Calories to kcal Converter
Convert calorie (small) to kilocalorie (food calorie) instantly. 1 cal = 0.001 kcal, worked steps and a full reference table.
How to use it
- Type the value in calorie (small) — the result updates as you type.
- Use Swap to flip the direction, or change either dropdown to convert between any two units.
- Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.
Examples
| 1 cal | 0.001 kcal |
| 5 cal | 0.005 kcal |
| 10 cal | 0.01 kcal |
| 100 cal | 0.1 kcal |
One calorie (small) equals 0.001 kilocalorie (food calorie)s (kcal). To convert calorie (small)s to kilocalorie (food calorie)s, multiply by 0.001; to go back the other way, multiply by 1000 instead.
The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.
What calorie (small)s and kilocalorie (food calorie)s actually measure
Calorie (small) (cal) — A calorie raises one gram of water by one degree Celsius — 4.184 joules. Chemistry and physics. Note this is the small calorie, not the food one.
Kilocalorie (food Calorie) (kcal) — A kilocalorie is a thousand small calories. Food labels call it a Calorie, capitalised. Nutrition and diet planning.
Calories to kcal conversion table
The most common values, worked out in advance. Anything not listed can be typed straight into the converter.
| cal | kcal |
|---|---|
| 1 cal | 0.001 kcal |
| 2 cal | 0.002 kcal |
| 5 cal | 0.005 kcal |
| 10 cal | 0.01 kcal |
| 25 cal | 0.025 kcal |
| 50 cal | 0.05 kcal |
| 100 cal | 0.1 kcal |
How to convert calorie (small)s to kilocalorie (food calorie)s by hand
Multiply the number of calorie (small)s by 0.001.
For example, 25 cal × 0.001 = 0.025 kcal.
Going the other way, divide by 0.001 — or multiply by 1000, which is the same thing and easier to do in your head.
Everything runs in your browser
There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.
Questions people ask
How many kcal are in 1 cal?
1 cal equals exactly 0.001 kcal. Multiply any value in calorie (small) by 0.001 to get kilocalorie (food calorie).
Is anything uploaded to a server?
No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.
Last updated 18 August 2026