1,001 tools
Free tools and calculators
Finance, health, math, date, home, text and developer tools that run right in your browser.
- Finance, loans and investing120 toolsLoan payment calculator, Loan amortization schedule, Auto loan calculator
- Business, commerce and marketing100 toolsMarkup calculator, Margin to markup converter, Markup to margin converter
- Tax, zakat and salary60 toolsSaudi VAT calculator (15%), UAE VAT calculator (5%), Bahrain VAT calculator (10%)
- Health, fitness and nutrition100 toolsBMI calculator, BMI calculator in pounds, feet and inches, BMI Prime calculator
- Math, geometry and statistics160 toolsPercentage of a number calculator, What percent is X of Y calculator, Percent change calculator
- Date and time70 toolsAge calculator in years, months and days, Age in days calculator, Age in weeks calculator
- Construction, home and auto90 toolsConcrete calculator (m³ and cubic yards), Concrete column calculator (round or square), Concrete mix calculator: cement, sand, aggregate
- Physics, chemistry and electrical120 toolsVelocity calculator: speed, distance and time, Acceleration calculator, Force calculator: Newton's second law F = ma
- Everyday, education and travel80 toolsGPA calculator (5.0 scale), GPA calculator (4.0 scale), Cumulative GPA calculator
- Writing and text tools50 toolsCharacter counter with and without spaces, Sentence counter, Paragraph counter
- Developer and web tools51 toolsMD5 hash generator, SHA-1 hash generator, SHA-256 hash generator
Finance, loans and investingAll 120 tools in Finance, loans and investing
- Loan payment calculatorWork out the monthly payment on any loan from the amount, annual interest rate and term, plus the total paid and total interest.
- Loan amortization scheduleBuild a month-by-month or year-by-year loan schedule showing the interest part, principal part and remaining balance of every payment.
- Auto loan calculatorCalculate a car loan payment after the down payment and trade-in, using a declining or flat rate, with total interest and full cost.
- Personal loan calculatorCalculate a personal loan payment with the admin fee, the net amount you receive, total cost and the effective APR after fees.
- APR calculatorFind the APR of a loan with fees, whether fees are paid upfront or added to the loan, plus the effective annual rate.
- Interest-only loan calculatorCalculate the interest-only payment, the higher payment that follows, and how much extra interest you pay versus a fully amortizing loan.
- Balloon loan calculatorCalculate the monthly payment on a loan or car finance plan with a large final balloon payment, plus the balloon, total interest and total paid.
- Loan early payoff calculatorFind the monthly payment needed to clear your loan by a date you choose, how much above your current payment that is, and the interest saved.
- Extra payment calculatorSee how much interest you save and how many months you cut by adding a fixed amount to your monthly payment, with the new payoff time.
- Loan comparison calculatorCompare two loan offers by rate, term and fees to see each monthly payment, each total cost, which one is cheaper and by how much.
- Loan affordability calculatorWork out the largest loan you can take from your monthly salary, the deduction limit, your current debts, the interest rate and the term.
- Loan payment frequency calculatorCalculate a loan payment made weekly, every two weeks, monthly, quarterly or yearly, and compare total interest for each frequency in one table.
- Loan interest paid calculatorFind the interest and principal paid between any two payments of your loan, such as year one or year three, plus total interest and the balance after.
- Rule of 78 calculatorCalculate the interest rebate and payoff amount when you settle a precomputed-interest loan early under the Rule of 78 (sum of digits).
- Loan term calculatorWork out how many months it takes to repay a loan at the monthly payment you choose, with the final payment and total interest.
- Loan interest rate calculatorFind the real annual interest rate of a loan from its amount, monthly payment and number of payments, plus the effective annual rate.
- Remaining loan balance calculatorCalculate the balance left on your loan after a number of payments, how much principal and interest you have paid so far, and payments left.
- Loan refinance calculatorCompare your current loan with a new rate and term to see the monthly saving, net saving after costs and the months to break even on refinancing.
- Loan amount calculatorCalculate the loan amount a set monthly payment can repay at a given interest rate and term, with the total paid and total interest.
- Loan grace period calculatorCalculate the monthly payment on a loan that starts with a grace period, whether grace interest is added to the balance or paid monthly.
- Mortgage calculatorWork out the monthly mortgage payment from home price, down payment, annual rate and term, with total interest and total amount paid.
- Mortgage amortization calculatorSee a year by year mortgage amortization schedule: how much of your payments goes to interest and principal, and the balance left each year.
- Mortgage refinance calculatorCompare your current mortgage payment with a refinance offer, and see the monthly saving, break-even months and lifetime difference after costs.
- Rent vs buy calculatorCompare the net cost of buying a home with a mortgage against renting over the years you choose, with rent growth, price growth and investment return.
Business, commerce and marketingAll 100 tools in Business, commerce and marketing
- Markup calculatorWork out the selling price from cost and markup percentage, with the profit per unit and the real margin on the selling price.
- Margin to markup converterConvert a target profit margin on the selling price into the matching markup on cost, plus the multiplier to apply to cost.
- Markup to margin converterFind the real profit margin on the selling price when you price with a fixed markup on cost, plus the cost multiplier.
- Reverse markup calculatorFind the original cost from a selling price and a known markup percentage, with the profit amount and margin on price.
- Cost-plus pricing calculatorAdd up materials, labour and overhead per unit, then apply a markup to get the selling price, profit and margin.
- Price for target margin after feesFind the selling price that hits your target margin after a marketplace or payment fee, as a percentage plus a fixed fee per order.
- Sales commission calculatorCalculate a salesperson commission from sales value and commission rate, with total pay once the base salary is added.
- Tiered commission calculatorWork out commission when a higher rate applies above a sales threshold, with the effective commission rate on total sales.
- Sales target and leads calculatorTurn a revenue target into the number of deals and leads you need, split by month, from average deal size and close rate.
- Conversion rate calculatorCalculate conversion rate from visitors and orders or sign-ups, and how many visitors you need on average for one conversion.
- Average order value calculatorCalculate average order value from total revenue and number of orders, plus average items per order and average item price.
- Price increase sales volume calculatorSee how far unit sales can fall after a price increase while keeping the same total gross profit, from price, cost and increase.
- Price cut sales increase calculatorFind how much unit sales must rise after a price cut or promotion to keep the same total gross profit.
- Bundle pricing calculatorAdd up to 4 product prices and apply a bundle discount to get the bundle price and customer saving, plus profit and margin with cost.
- Wholesale price calculatorWork out the wholesale price from the suggested retail price and the retailer margin, plus the distributor price if one is involved.
- Volume pricing and unit price ladderSet three quantity discount tiers, get the unit price and order total for any quantity, and a price ladder table to show buyers.
- Price elasticity of demand calculatorCalculate price elasticity of demand with the midpoint method from two prices and quantities, whether demand is elastic, and the revenue change.
- Sales run rate calculatorProject full-period sales from sales to date and days elapsed, compare with your target, and see the daily rate you still need.
- Sales quota attainment calculatorCalculate quota attainment from actual sales and the sales quota, with the amount still needed or the amount above quota.
- New price after cost increase calculatorWhen your product cost rises, find the new price that keeps the same profit margin, or the same profit amount per unit.
- Marketplace fee and profit calculatorWork out your net profit per order on marketplaces like Amazon or Noon after commission, payment fees, fixed fees, shipping and product cost.
- Cash on delivery (COD) cost calculatorFind the real cost of cash on delivery orders, including collection fees, shipping, the refusal rate and return charges, per delivered order.
- Ecommerce return cost calculatorCalculate what product returns cost you, from return shipping and handling to stock that cannot be resold, and the share carried by every order.
- Inventory turnover calculatorCalculate inventory turnover from cost of goods sold and opening and closing stock, with average inventory and the days it takes to sell through.
Tax, zakat and salaryAll 60 tools in Tax, zakat and salary
- Saudi VAT calculator (15%)Add 15% Saudi VAT to an amount in riyals or extract it from a VAT-inclusive price, with the net amount, the tax and the total.
- UAE VAT calculator (5%)Work out 5% UAE VAT on any amount in dirhams, or take it out of a VAT-inclusive price to see the price before tax.
- Bahrain VAT calculator (10%)Add 10% Bahrain VAT to an amount in dinars or extract it from an inclusive price, showing the tax and the total.
- Oman VAT calculator (5%)Calculate 5% Oman VAT on an amount in Omani rials or pull it out of a VAT-inclusive price in one step.
- Egypt VAT calculator (14%)Calculate 14% Egyptian VAT on an amount in pounds or extract it from an inclusive price, with the net price and the total.
- Jordan sales tax calculator (16%)Work out Jordan general sales tax at 16% on an amount in dinars, or remove it from an inclusive price to see the price before tax.
- Morocco VAT calculator (TVA 20%)Convert a price from HT to TTC or back with Morocco TVA at 20%, and see the tax amount in dirhams.
- Turkey KDV calculator (20%)Add 20% Turkish VAT (KDV) to an amount in lira or extract it from a KDV-inclusive price (KDV dahil).
- UK VAT calculator (20%)Add 20% UK VAT to an amount in pounds sterling or remove it from a VAT-inclusive price, with the net and gross figures.
- Lebanon VAT calculator (11%)Calculate Lebanon VAT at 11% on any amount in lira or dollars, or extract it from a VAT-inclusive price.
- Tunisia VAT calculator (TVA 19%)Convert a price from HT to TTC or back with Tunisia TVA at 19%, and see the tax amount in Tunisian dinars.
- Algeria VAT calculator (TVA 19%)Calculate Algeria TVA at 19% on an amount in dinars, or extract it from a TTC price that already includes it.
- Germany VAT calculator (MwSt 19%)Convert a price between Netto and Brutto with German VAT at 19% or the reduced 7%, and see the tax amount in euros.
- France VAT calculator (TVA 20%)Convert a price from HT to TTC or back with French TVA at 20% or a reduced rate, and see the tax amount in euros.
- India GST calculator (CGST, SGST, IGST)Add Indian GST to an amount in rupees or extract it from an inclusive price, split into CGST and SGST or IGST by supply type.
- VAT rate finder from net and gross priceFind the VAT rate actually applied from the price before tax and the price after it, with the tax amount and the multiplier.
- VAT payable calculator (output minus input VAT)Work out net VAT for a return: VAT on sales minus VAT on purchases, to see whether you owe tax or have a credit.
- GCC VAT registration threshold checkerCheck whether VAT registration is mandatory or optional for your business in Saudi Arabia, the UAE, Bahrain or Oman from annual sales.
- Bulk VAT calculator for a list of amountsPaste a list of prices, one per line, to get VAT and the total for each line plus the sums, adding or removing tax at any rate.
- New price after a VAT rate changeReprice a product when the VAT rate changes: enter the current inclusive price and both rates to get the new price and the difference.
- Zakat calculatorWork out total zakat on cash, gold, silver, investments and receivables, minus debts due now, checked against the gold or silver nisab.
- Zakat on cash and savings calculatorCalculate zakat on cash, savings and bank balances at a quarter of a tenth, with a nisab check using the gold or silver price you enter.
- Gold zakat calculator by karatCalculate zakat on gold of any karat: convert weight to pure gold, compare it with the 85 g nisab, then get zakat in money and grams.
- Mixed karat gold zakat calculatorCombine gold of 24K, 22K, 21K and 18K into one pure weight, check it against the 85 g nisab and get the zakat due.
Health, fitness and nutritionAll 100 tools in Health, fitness and nutrition
- BMI calculatorWork out your body mass index from weight in kg and height in cm, see your WHO category and the healthy weight range for your height.
- BMI calculator in pounds, feet and inchesCalculate BMI from weight in pounds and height in feet and inches, using exact conversion to kilograms and meters.
- BMI Prime calculatorFind your BMI Prime, the ratio of your BMI to the upper healthy limit of 25, and see how far above or below that limit you are.
- Target weight for a BMI calculatorFind the weight that gives the BMI you want at your height, and how many kilograms you need to lose or gain to get there.
- Healthy weight range calculatorSee the lowest and highest healthy weight for your height, based on the WHO healthy BMI band of 18.5 to 24.9.
- Ideal weight calculatorCalculate your ideal body weight from height and sex with four medical formulas: Devine, Robinson, Miller and Hamwi, side by side.
- Broca and Lorentz ideal weight calculatorWork out ideal weight with the classic Broca formula (height minus 100) and the Lorentz formula, which adjusts for sex.
- BMR calculator (Mifflin-St Jeor)Calculate your basal metabolic rate with the Mifflin-St Jeor equation: the calories your body burns each day at complete rest.
- Harris-Benedict BMR calculatorCalculate basal metabolic rate with the Harris-Benedict equation, in the original 1919 version or the 1984 Roza and Shizgal revision.
- Katch-McArdle BMR calculatorCalculate BMR with the Katch-McArdle equation, which uses lean body mass. Useful if you know your body fat percentage.
- TDEE calculatorEstimate your total daily energy expenditure from BMR and activity level, the calories you need each day to keep your weight steady.
- Body fat calculator (US Navy method)Estimate your body fat percentage with just a tape measure using the US Navy method: height, neck and waist, plus hips for women.
- Body fat from BMI calculatorEstimate body fat percentage from BMI, age and sex using the Deurenberg equation, with no tape measure needed.
- Lean body mass calculatorCalculate your lean body mass with three known equations, Boer, James and Hume, plus the body fat percentage each one implies.
- FFMI calculator (fat-free mass index)Calculate your fat-free mass index and its height-adjusted value, a better gauge of muscle than BMI for people who train.
- Waist-to-hip ratio calculatorWork out your waist-to-hip ratio and compare it with the WHO cut-offs of 0.90 for men and 0.85 for women to gauge belly fat.
- Waist-to-height ratio calculatorWork out your waist-to-height ratio against the rule of keeping your waist under half your height, with the UK NICE bands.
- Body surface area calculatorCalculate body surface area in square meters with the Mosteller, Du Bois, Haycock and Gehan and George formulas used in dosing.
- Body roundness index (BRI) calculatorCalculate your body roundness index from waist and height, a newer measure of belly fat that links body shape to health risk.
- Body adiposity index (BAI) calculatorEstimate body fat percentage with the body adiposity index from hip circumference and height only, with no weight or scale needed.
- Calorie deficit calculator with target dateWork out your daily calorie deficit, expected weekly weight loss and the date you reach your goal weight from maintenance and intake.
- Calories to reach a goal weight in set weeksSet current weight, goal weight and number of weeks to get the daily calorie target, the deficit needed and the weekly loss rate.
- Macro calculator: protein, carbs and fatSplit your daily calories into grams of protein, carbohydrate and fat using the percentages you choose, with the calories of each.
- Daily protein intake calculatorFind how many grams of protein you need a day from your weight and situation: inactive adult, older adult or regular exerciser, split by meal.
Math, geometry and statisticsAll 160 tools in Math, geometry and statistics
- Percentage of a number calculatorFind any percentage of a number, such as 15% of 200, and see the decimal multiplier used in the calculation.
- What percent is X of Y calculatorFind what percentage one number is of another, such as your score out of the full mark or progress toward a target.
- Percent change calculatorCalculate the percentage increase or decrease from an old value to a new one, with the difference and direction.
- Percent difference calculatorCalculate the percent difference between two positive values relative to their average, with neither one treated as the base.
- Reverse percentage calculatorFind the original value before a known percentage increase or decrease, such as a price before tax or before a discount.
- Increase or decrease a number by a percentageAdd a percentage to a number or take it away, and get the new value and the change, such as a 10% salary raise.
- Successive percentage change calculatorCombine up to 4 percentage changes in a row, rises or falls, into one net percentage and a final value.
- Percent error calculatorCalculate the percent error between a measured or estimated value and a known true value, plus the absolute error.
- Average of percentages calculatorWork out the correct average of several percentages, weighted by the size of each group, and compare it with the plain mean.
- Percent to fraction converterTurn any percentage into a fraction in lowest terms and a decimal, such as 12.5% to 1/8, including repeating decimals.
- Ratio simplifierReduce a ratio of two or three terms to its smallest whole numbers, such as 12:18 to 2:3, with the 1:n form and each share.
- Ratio scalerScale a ratio up or down while keeping it in proportion once you know one term, such as scaling a 2:3:5 mix.
- Proportion calculator (rule of three)Solve for the unknown in the proportion A:B = C:X by cross multiplication, such as the price of 6 kg when 2 kg cost 5.
- Divide an amount by a ratioSplit an amount or quantity between several parties in a given ratio, such as sharing 1000 between two partners at 2:3.
- Fraction calculatorAdd, subtract, multiply or divide two fractions and get the answer in lowest terms, as a mixed number and as a decimal.
- Fraction simplifierReduce any fraction to lowest terms by dividing by the greatest common divisor, and see it as a mixed number and a decimal.
- Fraction to decimal converterConvert any fraction to an exact decimal with the repeating part shown in brackets, such as 1/6 = 0.1(6), plus the percentage.
- Decimal to fraction converterConvert any terminating or repeating decimal to a fraction in lowest terms and a mixed number, such as 0.75 = 3/4 and 0.(3) = 1/3.
- Mixed number to improper fractionConvert a mixed number such as 2 1/3 into an improper fraction such as 7/3 in lowest terms, with its decimal value.
- Improper fraction to mixed numberConvert an improper fraction such as 7/3 into a mixed number such as 2 1/3, with the whole part and remaining fraction in lowest terms.
- Quadratic equation solverSolve any quadratic equation ax² + bx + c = 0 with the quadratic formula, showing the discriminant, root type and parabola vertex.
- Linear equation solverSolve a one-variable linear equation of the form ax + b = cx + d, with the simplified form and the no-solution and infinite-solution cases.
- System of 2 linear equations solverSolve a system of two linear equations in x and y using Cramer's rule, with the determinant and detection of no or infinitely many solutions.
- System of 3 linear equations solverSolve three linear equations in x, y and z with Cramer's rule, showing the determinant and whether the solution is unique, missing or infinite.
Date and timeAll 70 tools in Date and time
- Age calculator in years, months and daysFind your exact age in years, months and days from your date of birth to today or any date, plus total months, weeks and days.
- Age in days calculatorSee how many days you have been alive from your birth date to today or another date, with the same span in weeks, hours and years.
- Age in weeks calculatorWork out your age or your baby's age in whole weeks plus leftover days from the date of birth, with the decimal value and total days.
- Age in months calculatorCalculate age in whole calendar months plus extra days from the date of birth, the usual way to track a child's age up to about 3.
- Age in hours, minutes and secondsFind how many hours, minutes and seconds you have lived since the moment of birth, using the birth date and time and a second date and time.
- How old will I be in a given yearType a future or past year to see the age you reach in it, the date and weekday of your birthday, and your age at the start and end of it.
- Next birthday countdownSee how many days are left until your next birthday, which weekday it falls on and the age you will turn.
- What day of the week was I bornFind the weekday you were born on from your birth date, with its day of the year, whether it was a leap year and the matching Hijri date.
- Age difference calculatorEnter two birth dates to get the age gap in years, months and days, in total days and whole months, and who is older.
- Retirement date calculator by ageFind the date you reach retirement age from your birth date and the retirement age you set, with the time and days left until then.
- Hijri age calculator from a Gregorian dateEnter your Gregorian birth date to get your age in Hijri years, months and days on the Umm al-Qura calendar, plus your Hijri birth date.
- Age from a Hijri birth dateEnter your Hijri birth day, month and year to get your Hijri and Gregorian age in detail, your Gregorian birth date and the weekday.
- Next Hijri birthdaySee when your next birthday falls on the Hijri calendar, its Gregorian date, how many days are left and the Hijri age you will turn.
- Generation calculator by birth yearType your birth year to find your generation: Millennials, Gen Z, Gen X or another, with the generation's birth years and the source.
- Age milestones: 10,000 days and a billion secondsFind when you turn 10,000 days, 20,000 days and one billion seconds old, with a table of day milestones, weekdays and which have passed.
- Birthday weekday by yearSee which weekday your birthday falls on this year and in the years ahead, in a table with the date and your age each year.
- School entry age calculatorCheck whether your child meets the school or kindergarten entry age on a set date, their age on that day and when they reach it.
- Age by birth year calculatorEnter just a birth year to see how old people born that year are now: their age before and after this year's birthday.
- Days between dates calculatorCount the days between two dates, shown also as weeks and days and as years, months and days, with an option to count the end day.
- Add days to a dateAdd any number of days to a date and see the resulting date and weekday, such as a deadline 30 or 90 days from now.
- Subtract days from a dateSubtract a number of days from a date to find the earlier date and its weekday, such as the date 40 or 100 days ago.
- Add or subtract weeks from a dateAdd weeks to a date or subtract them to get the resulting date, such as an appointment 6 weeks later or 12 weeks earlier.
- Add or subtract months from a dateAdd or subtract calendar months from a date, with month-end handling: 31 January plus 1 month becomes the last day of February.
- Add or subtract years from a dateAdd or subtract calendar years from a date to get the result, with 29 February handled in years that are not leap years.
Construction, home and autoAll 90 tools in Construction, home and auto
- Concrete calculator (m³ and cubic yards)Work out the concrete volume for a slab, footing or wall in cubic metres and cubic yards, with your own waste allowance.
- Concrete column calculator (round or square)Find the concrete volume for round or square columns and tube forms from the diameter or side, the height and the count.
- Concrete mix calculator: cement, sand, aggregateGet the cement bags, sand and coarse aggregate for a concrete volume from a nominal mix ratio such as 1:2:4 or 1:1.5:3.
- Concrete bag calculator (premix bags)Find how many premixed concrete bags you need for a small pad or path from its area, depth and the yield printed on the bag.
- Plaster calculator: cement and sandEstimate cement bags and sand for wall plastering or rendering from the area, the coat thickness and a mix ratio such as 1:4 or 1:6.
- Brick calculator with mortar volumeCount the bricks for a wall from its size, the brick dimensions and mortar joint, with the mortar volume and a waste allowance.
- Concrete block calculator for wallsCount the concrete blocks for a wall from its area, the block face size, the mortar joint and a waste allowance, for any block size.
- Tile calculator: tiles and boxesWork out how many floor or wall tiles and boxes you need from the room size, the tile size, tiles per box and a waste allowance.
- Tile grout calculatorEstimate the kilograms of grout for tile joints from the tile size, tile thickness, joint width and the tiled area, with bag count.
- Paint calculator for a roomCalculate litres of paint and cans for a room's walls and ceiling from its size, openings, number of coats and paint coverage.
- Wallpaper roll calculatorWork out how many wallpaper rolls you need from wall width and height, roll size and pattern repeat, with strips per roll.
- Drywall calculator (plasterboard sheets)Count the drywall or plasterboard sheets for walls, partitions or ceilings from the area, sheet size, sides covered and waste.
- Rebar weight calculatorCalculate reinforcing steel weight in kilograms and tonnes from bar diameter, length and number of bars, with kg per metre.
- Gravel calculator (tonnes and m³)Work out gravel, crushed stone or sand for a driveway or garden in cubic metres and tonnes from the area, depth and density.
- Asphalt calculator (tonnes)Work out the tonnes of hot mix asphalt to pave a driveway or car park from the area, compacted thickness and density.
- Laminate flooring and skirting calculatorWork out the packs of laminate, parquet or vinyl flooring and skirting board lengths from the room size, pack coverage and waste.
- Concrete stairs calculatorFind the concrete volume for solid steps poured on the ground from the number of steps, width, riser height and tread depth.
- Slab rebar calculator (bar grid)Count the bars in a slab or floor mesh and get their total length and weight from the slab size, spacing, cover and bar diameter.
- AC size calculator (BTU and tons)Estimate the air conditioner size for a room in BTU/h and tons from floor area, sun exposure, occupants and kitchen use.
- AC efficiency calculator (EER, COP)Work out an air conditioner EER, COP and kW per ton from the cooling capacity and electrical input shown on its label.
- AC running cost calculatorCalculate air conditioner energy use in kWh and monthly running cost from its capacity, EER, running hours and electricity price.
- Electricity bill calculator with tiersCalculate an electricity bill from kWh with two price tiers, a fixed fee and VAT, preset to the Saudi residential tariff.
- kWh from electricity bill amountFind how many kWh you used from the electricity bill amount after removing VAT and the fixed fee, using two editable tiers.
- Meter reading consumption calculatorWork out electricity use from previous and current meter readings, with the daily average, a 30 day projection and a flat-rate cost.
Physics, chemistry and electricalAll 120 tools in Physics, chemistry and electrical
- Velocity calculator: speed, distance and timeFind speed from distance and time, or solve for distance or travel time, with results in m/s, km/h and mph.
- Acceleration calculatorWork out acceleration from initial speed, final speed and time, in m/s² and in g, such as a car going from 0 to 100 km/h.
- Force calculator: Newton's second law F = maApply Newton's second law: find force from mass and acceleration, mass from force and acceleration, or acceleration from force and mass.
- Kinetic energy calculatorCalculate the kinetic energy of a moving object from its mass and speed, in joules and kilojoules, with speed in m/s, km/h or mph.
- Gravitational potential energy calculatorCalculate the gravitational potential energy of a raised object from its mass, height and g, with the result in joules and kilojoules.
- Work calculator (force × distance)Calculate the work done by a force from its size, the displacement and the angle between them, with the result in joules and kilojoules.
- Mechanical power calculatorCalculate power from work and time or from force and speed, in watts, kilowatts, mechanical horsepower and metric horsepower.
- Momentum calculatorCalculate the linear momentum of an object from its mass and velocity in kg·m/s, along with the matching kinetic energy.
- Impulse calculatorCalculate impulse from force and contact time or from the change in momentum, with the resulting speed change or average force.
- Free fall calculatorCalculate how long an object takes to fall from a given height and its impact speed, ignoring air resistance, with an editable g.
- Projectile motion calculatorFind the range, maximum height, flight time and impact speed of a projectile from its launch speed, launch angle and starting height.
- Centripetal force and circular motion calculatorCalculate centripetal force, centripetal acceleration, angular velocity and period for an object moving in a circle at constant speed.
- Friction force calculatorCalculate friction force and normal force for an object on a flat or inclined surface from the friction coefficient, mass and slope angle.
- Torque calculatorCalculate torque from force, lever arm length and the angle between them, in N·m with conversions to lbf·ft and kgf·m.
- Density calculator: mass and volumeFind density from mass and volume, mass from density and volume, or volume from mass and density, in g/cm³ and kg/m³.
- Kinematic equations calculator (SUVAT)Use the constant-acceleration equations to find final velocity, displacement and time from initial velocity and acceleration.
- Newton's law of gravitation calculatorCalculate the gravitational pull between two masses from their masses and the distance between their centers using Newton's law and G.
- Simple pendulum period calculatorCalculate the period and frequency of a simple pendulum from its length and gravity, plus swings per minute, for small angles.
- Hooke's law spring calculatorUse Hooke's law to find spring force, spring constant or extension, along with the elastic energy stored in the spring.
- Elastic and inelastic collision calculatorFind the speeds of two bodies after a head-on collision in a straight line, elastic or perfectly inelastic, with momentum and energy lost.
- Ohm's law calculatorEnter any two of voltage, current, resistance and power to get the other two instantly using Ohm's law and the power law.
- Electrical power calculator (watts)Calculate electrical power in watts and kilowatts from voltage and current for DC, single-phase and three-phase AC, with power factor.
- Watts to amps calculatorConvert power in watts to current in amps from the voltage and supply type: DC, single-phase or three-phase AC, with power factor.
- kVA to amps calculatorFind the full-load current in amps from apparent power in kVA and voltage, for a single-phase or three-phase generator or transformer.
Everyday, education and travelAll 80 tools in Everyday, education and travel
- GPA calculator (5.0 scale)Work out your semester GPA on the 5.0 scale used by Saudi universities from course grades and credit hours, with total points and the rating.
- GPA calculator (4.0 scale)Calculate a GPA on the 4.0 scale, either the US style with plus and minus grades or the Saudi 4-point scale, from grades and credit hours.
- Cumulative GPA calculatorFind your new cumulative GPA after this semester from your previous GPA and hours plus the semester GPA and hours, on a 5.0 or 4.0 scale.
- Raise GPA calculatorFind the semester GPA you need next term to reach a target cumulative GPA, and the highest cumulative GPA you could reach, on a 5.0 or 4.0 scale.
- Hours needed to raise GPACalculate how many credit hours and semesters at an expected term GPA it takes for your cumulative GPA to reach a target, on a 5.0 or 4.0 scale.
- Weighted grade calculatorCalculate your course grade from assignment and exam scores and their weights, with the total weight and the points earned so far.
- Final exam score needed calculatorFind the score you need on the final exam to reach the course grade you want, with a table for A, B, C and D targets.
- Final course grade calculatorCalculate your final course grade once you know the final exam score and its weight, with the letter grade and how much the grade moved.
- Percentage to letter grade converterConvert a percentage to a letter grade and grade points on the Saudi 5.0 scale (Excellent plus to Fail) or the US 4.0 scale.
- Test score percentage calculatorTurn a test score into a percentage of the full mark, with the letter grade and the number of points missed.
- Easy grader chart for teachersA teacher tool: enter the number of questions to get a full chart of the percentage and letter grade for every number of wrong answers.
- Marks percentage calculatorAdd up your subject marks and turn them into an overall percentage of the total maximum marks, with the percentage for each subject.
- Grade curve calculatorCurve a test score three common ways: add the gap to the top score, scale to the top score, or use the square root curve.
- Exam study schedule plannerSpread your chapters over the days left before an exam, see the daily study hours, keep review days, and get a dated day by day plan.
- Pomodoro study session plannerSplit your study time into focus sessions with short and long breaks using the Pomodoro method, and see the finish time and schedule.
- Book reading time calculatorWork out how long a book takes to read from its pages, words per page and your reading speed, and how many days at a set daily time.
- Attendance percentage calculatorCalculate your attendance percentage, how many classes in a row you need to reach the required rate, or how many you can still miss.
- Absence limit calculatorFind the most absences allowed in a course before exam denial, how many you have left and your current absence rate, with an editable limit.
- Saudi weighted percentage calculatorCalculate the Saudi university admission weighted percentage from your high school grade, Qudurat and Tahsili, using 30/30/40 or your university weights.
- Required Tahsili score calculatorFind the Tahsili score you need to reach a target weighted percentage, from your high school grade, Qudurat score and the admission weights.
- Travel time calculatorWork out how long a trip takes from distance and average speed, with break time added so you can plan your arrival.
- Fuel cost split calculatorFind the fuel cost of a trip from distance, car consumption and price per liter, then split it evenly among travelers.
- Trip cost per person calculatorAdd up transport, lodging, food and activities with a contingency buffer to get the total trip cost and each person's share.
- Flight distance calculator (coordinates)Great-circle distance between two latitude and longitude points using the haversine formula, in km, miles and nautical miles.
Writing and text toolsAll 50 tools in Writing and text tools
- Character counter with and without spacesCount the characters in your text with and without spaces, plus letters, digits, symbols and UTF-8 bytes. Handles Arabic and emoji correctly.
- Sentence counterCount the sentences in Arabic or English text, with the word count, average sentence length and the number of questions and exclamations.
- Paragraph counterCount paragraphs in your text by blank lines or by every line break, with sentence and word counts and the average words per paragraph.
- Reading time calculatorEstimate how long a text or article takes to read silently, from its word count and the reading speed you set in words per minute.
- Speaking time calculatorWork out how long a speech, presentation or voice-over script takes to deliver, from its word count and the speaking pace you choose.
- Keyword density checkerCount how often a keyword or key phrase appears in your text and its density as a share of all words, ignoring Arabic diacritics.
- Word frequency counterList the most repeated words in your text in a table sorted by count, with each word’s share, ignoring letter case and Arabic diacritics.
- Repeated phrase finderFind the two, three or four word phrases that repeat in your text, sorted by how many times each appears within sentences.
- Flesch reading ease and Flesch-Kincaid gradeCalculate the Flesch reading ease score and Flesch-Kincaid grade level of English text, with the word, sentence and syllable counts.
- Coleman-Liau index calculatorCalculate the Coleman-Liau readability index of English text from letters and sentences per 100 words, without relying on syllable counts.
- Automated readability index (ARI) calculatorCalculate the automated readability index (ARI) of English text from average word length in characters and average sentence length in words.
- Letter frequency counterCount how many times each Arabic or Latin letter appears in your text and its percentage, in a table sorted by frequency or by letter.
- Longest word finderFind the longest and shortest words in your text with their letter counts, the average word length and a list of the 10 longest words.
- Unique words counterCount the unique words in your text, the words used only once and the lexical diversity ratio, and get the list of distinct words.
- Tweet character counter for XCount your post length the way X does out of 280: Arabic letters weigh 1, emoji weigh 2 and every link counts as 23 characters.
- SMS character and segment counterCount SMS characters and message segments by encoding: GSM-7 allows 160 characters, while Arabic uses UCS-2 with 70 per message.
- Average sentence length calculatorCalculate the average words per sentence, the longest and shortest sentence, and how many sentences go over a length limit you choose.
- Find and replace textFind a word or phrase in your text and replace every match at once, with match case, whole word and regular expression options.
- Remove line breaksRemove line breaks from text copied from a PDF or an email and make it flow, with options to keep paragraphs or join lines with no space.
- Remove empty linesDelete the blank lines from any text or list in one step, with an option to treat lines that hold only spaces as empty too.
- Remove punctuationStrip Arabic and English punctuation such as commas, question marks and brackets from text, while keeping separators inside numbers.
- Remove numbers from textRemove Western and Arabic-Indic digits from text, either every single digit or whole numbers including decimals and signs.
- Remove emojis from textRemove every emoji from text, including flags, skin tones and combined emoji, while leaving Arabic and English letters untouched.
- Add prefix and suffix to linesAdd text to the start and end of every line at once, such as bullets, quotes or commas, to prepare lists and code.
Developer and web toolsAll 51 tools in Developer and web tools
- MD5 hash generatorCompute the MD5 digest of any text or hex bytes in your browser, shown as hex and Base64 with the input size in bytes.
- SHA-1 hash generatorCompute the 160-bit SHA-1 digest of any text or hex bytes and view it as lowercase hex, uppercase hex and Base64.
- SHA-256 hash generatorCompute the SHA-256 digest of Arabic or English text or hex bytes, as hex and Base64, without sending any data to a server.
- SHA-384 hash generatorCompute the 384-bit SHA-384 digest of text or hex bytes, including the Base64 form used by the script integrity attribute.
- SHA-512 hash generatorCompute the 512-bit SHA-512 digest of text or hex bytes as a 128-character hex string and as Base64, with the input size.
- SHA3-256 hash generatorCompute the FIPS 202 SHA3-256 digest of text or hex bytes as hex and Base64, and see how it differs from Keccak-256.
- CRC32 checksum calculatorCompute the CRC-32 of any text or hex bytes, the variant used by ZIP, PNG and Ethernet, as hex and as a decimal number.
- HMAC-SHA256 generatorCompute an HMAC-SHA256 signature for a message with a text or hex secret key, as hex and Base64, to check webhooks and API calls.
- UUID v4 generatorGenerate up to 100 random UUID v4 values at once from a secure random source, with uppercase, hyphen and brace options.
- UUID v7 generatorGenerate time-ordered UUID v7 values that start with a millisecond timestamp, optionally for a chosen time, with the UTC date shown.
- UUID validator and decoderCheck whether a UUID or GUID is well formed, see its version, variant and canonical form, and read the date inside v1, v6 and v7 ids.
- ULID generatorGenerate 26-character ULIDs that sort by time as plain text, for now or a time you pick, with the time part and its date shown.
- Nano ID generatorGenerate short, URL-safe Nano IDs with the length and alphabet you choose, and see how many bits of randomness each id carries.
- Random hex string generatorGenerate secure random hex strings of any length for API keys, session tokens and salts, with optional 0x prefix and uppercase.
- Luhn algorithm checkerCheck card numbers, IMEIs and other ids with the Luhn algorithm, and work out the check digit to append, with the running sum.
- ISBN validator and converterCheck whether an ISBN-10 or ISBN-13 is valid by its check digit and convert between the two forms, including the X in ISBN-10.
- IBAN validatorValidate an IBAN from Saudi Arabia, the UAE, the Gulf, Europe and more with the mod 97 test and country length, and get correct check digits.
- IPv4 subnet calculator (CIDR)Get the network and broadcast address, usable host range, host count, subnet mask and wildcard from an IPv4 address and prefix.
- IP address to binary, decimal and hexConvert an IPv4 address to dotted binary with 8 bits per octet, to a single decimal integer, and to hexadecimal.
- Decimal integer to IP addressTurn an integer from 0 to 4294967295, or a 0x hex value, back into a normal dotted IPv4 address with its binary form.
- IPv6 address expander and compressorEnter an IPv6 address in any form to get the full 8-group form, the RFC 5952 compressed form, and the ip6.arpa reverse name.
- IP range to CIDR converterTurn an IPv4 range from a start address to an end address into the smallest list of CIDR blocks, ready for firewall rules.
- IP address type checker: public or privateCheck whether an IPv4 or IPv6 address is public, private, loopback, link-local, multicast or documentation, with its range and RFC.
- MAC address formatterConvert a MAC address between colon, hyphen and Cisco dot formats, see if it is unicast or multicast, global or local, and its EUI-64 link-local IPv6.
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