kcal to Calories Converter
Convert kilocalorie (food calorie) to calorie (small) instantly. 1 kcal = 1000 cal, worked steps and a full reference table.
How to use it
- Type the value in kilocalorie (food calorie) — 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 kcal | 1000 cal |
| 5 kcal | 5000 cal |
| 10 kcal | 10000 cal |
| 100 kcal | 100000 cal |
One kilocalorie (food calorie) equals 1000 calorie (small)s (cal). To convert kilocalorie (food calorie)s to calorie (small)s, multiply by 1000; to go back the other way, multiply by 0.001 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 kilocalorie (food calorie)s and calorie (small)s actually measure
Kilocalorie (food Calorie) (kcal) — A kilocalorie is a thousand small calories. Food labels call it a Calorie, capitalised. Nutrition and diet planning.
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.
kcal to Calories conversion table
The most common values, worked out in advance. Anything not listed can be typed straight into the converter.
| kcal | cal |
|---|---|
| 1 kcal | 1000 cal |
| 2 kcal | 2000 cal |
| 5 kcal | 5000 cal |
| 10 kcal | 10000 cal |
| 25 kcal | 25000 cal |
| 50 kcal | 50000 cal |
| 100 kcal | 100000 cal |
How to convert kilocalorie (food calorie)s to calorie (small)s by hand
Multiply the number of kilocalorie (food calorie)s by 1000.
For example, 25 kcal × 1000 = 25000 cal.
Going the other way, divide by 1000 — or multiply by 0.001, 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 cal are in 1 kcal?
1 kcal equals exactly 1000 cal. Multiply any value in kilocalorie (food calorie) by 1000 to get calorie (small).
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