Daily interest calculator
Useful for short deposits, savings accounts and late payments where interest is counted by the day.
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How to use it
- Enter amount, annual interest rate, number of days and day-count basis.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Interest = P × annual rate × days / year basis (365 or 360). Daily interest = P × rate / basis.
Example
Inputs: Amount = 10,000 your currency, Annual interest rate = 5 %, Number of days = 30 days, Day-count basis = 365 days (Actual/365). Result: Interest for the period: 41.10; Interest per day: 1.37; Total amount: 10,041.10.
Limits and caveats
- Simple interest with no daily compounding.
- The day-count basis varies by bank and contract, so check yours.
Questions about this tool
What is the difference between 365 and 360 basis?
A 360 basis divides by fewer days, so daily interest is slightly higher. Money markets and some loans use it.
How do I count days between two dates?
Count the actual days from deposit to withdrawal; usually one of the two end dates is not counted.
Is daily interest added to the balance?
Not here; this is simple interest. Some accounts credit it monthly, which makes it compound.