Convert calories to kilocalories

1 cal=0.001kcal

Use the converter below to change any calories value into kilocalories instantly — with formula, conversion table, and real-world examples.

You have

Equals

0.001

Conversion formula

Forward

kilocalories = calories × 0.001

Reverse

calories = kilocalories × 1,000

Example: 10 cal × 0.001 = 0.01 kcal.

About both units

From

Calorie

cal

The gram calorie (small calorie) equals 4.184 joules — the energy to raise 1 g of water by 1 °C. It is a scientific unit, distinct from the nutrition "Calorie" (kcal). Largely replaced by joules in modern science.

Real-world: Raising 1 g of water 1 °C: 1 cal. A 100 kcal snack = 100,000 small calories.

Read full calorie reference →

Kilocalorie

kcal

The kilocalorie equals 1000 small calories or 4184 joules. This is the nutrition "Calorie" (capital C in some US labels). EU and UK labels always say kcal; US labels say Calories. Adult daily intake is about 2000 kcal.

Real-world: Adult daily intake: ~2000 kcal. Banana: 90 kcal. Big Mac: 550 kcal. 30 min running: ~300 kcal burned.

Read full kilocalorie reference →

Calorie to Kilocalorie conversion table

Common calories to kilocalories values for quick reference.

Calorie (cal)	Kilocalorie (kcal)
1 cal	0.001 kcal
10 cal	0.01 kcal
100 cal	0.1 kcal
500 cal	0.5 kcal
1,000 cal	1 kcal
5,000 cal	5 kcal
10,000 cal	10 kcal
50,000 cal	50 kcal
100,000 cal	100 kcal
500,000 cal	500 kcal

Tips & common mistakes

Quick tips

1 cal = 4.184 J. 1 kcal = 4184 J.
Scientific "calorie" and nutrition "Calorie" differ by 1000×.
Prefer joules in modern scientific writing.

Avoid these

Assuming "calories" on food labels means gram calories — they are kcal.
Mixing gram calories and kilocalories in calculations.
Confusing calorie (energy) with calorimeter (apparatus).

Frequently asked questions

How many kilocalories in a calorie?

One calorie equals 0.001 kilocalories.

How do I convert calories to kilocalories?

Multiply the calorie value by 0.001 to get the equivalent in kilocalories.

What is 100 calories in kilocalories?

100 calories equals 0.1 kilocalories.

Is a calorie bigger than a kilocalorie?

No. 1 calorie equals 0.001 kilocalories, so one calorie is smaller.

How to convert calories to kilocalories without a calculator?

Multiply by 0 for a quick estimate; use a calculator for precise results.

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