Calories to kilocalories
Type a value in calories to see it in kilocalories straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the calories box.
- Read the result in kilocalories as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
kcal = cal × 0.001
Multiply the value in calories by 0.001 to get kilocalories.
Example
To convert 25 cal to kilocalories: 25 × 0.001 = 0.025 kcal.
Conversion table
| Calories (cal) | Kilocalories (kcal) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
About the units
- Calorie
- The small calorie in its thermochemical definition, exactly 4.184 joules. The food calorie on labels equals 1000 of these.
- Kilocalorie
- Equal to 1000 thermochemical calories, exactly 4184 joules. This is the everyday food calorie.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many kilocalories are in one calorie?
1 cal = 0.001 kcal exactly.
How do I convert calories to kilocalories?
Use kcal = cal × 0.001. For example, 25 cal = 0.025 kcal.
How many calories are in one kilocalorie?
1 kcal = 1,000 cal.
Which calorie do these converters use?
The thermochemical calorie, exactly 4.184 joules, the factor many countries use to turn kcal into kJ on food labels. The International Table calorie is 4.1868 joules, less than 0.07% larger.
What is the difference between kW and kWh?
A kilowatt is a unit of power, the rate of using energy, while a kilowatt-hour is an amount of energy. A 2 kW heater running for three hours uses 6 kWh.