How to convert calories to kilocalories
To convert calories to kilocalories, multiply the value by the conversion factor 0.001. To go the other way, multiply by 1,000 (or divide by 0.001).
Worked example: 25 cal to kcal
- Write the value: 25 cal
- Multiply by 0.001: 25 × 0.001
- Result: 0.025 kcal
Calorie to Kilocalorie conversion table
Quick reference values, rounded to 6 significant digits.
| Calorie (cal) | Kilocalorie (kcal) |
|---|---|
| 0.1 cal | 0.0001 kcal |
| 0.25 cal | 0.00025 kcal |
| 0.5 cal | 0.0005 kcal |
| 1 cal | 0.001 kcal |
| 2 cal | 0.002 kcal |
| 3 cal | 0.003 kcal |
| 4 cal | 0.004 kcal |
| 5 cal | 0.005 kcal |
| 6 cal | 0.006 kcal |
| 7 cal | 0.007 kcal |
| 8 cal | 0.008 kcal |
| 9 cal | 0.009 kcal |
| 10 cal | 0.01 kcal |
| 12 cal | 0.012 kcal |
| 15 cal | 0.015 kcal |
| 20 cal | 0.02 kcal |
| 25 cal | 0.025 kcal |
| 30 cal | 0.03 kcal |
| 40 cal | 0.04 kcal |
| 50 cal | 0.05 kcal |
| 75 cal | 0.075 kcal |
| 100 cal | 0.1 kcal |
| 250 cal | 0.25 kcal |
| 500 cal | 0.5 kcal |
| 1,000 cal | 1 kcal |
Kilocalorie to Calorie
| kcal | cal |
|---|---|
| 1 kcal | 1,000 cal |
| 5 kcal | 5,000 cal |
| 10 kcal | 10,000 cal |
| 50 kcal | 50,000 cal |
| 100 kcal | 100,000 cal |
1 Calorie in other energy units
About Calorie and Kilocalorie
What is a calorie (cal)?
A small calorie is the energy to raise 1 g of water by 1 °C (4.184 J).
What is a kilocalorie (kcal)?
A kilocalorie (food Calorie) equals 1,000 calories, used for diet and nutrition.
Where calorie to kilocalorie conversion is used
Energy conversions are needed for electricity bills, food calories, heating, batteries and physics. Converting between calories and kilocalories is especially common when you compare products, read foreign specifications, or fill in forms that expect a specific unit.
Need every unit at once? Use the full Energy Converter.
Frequently asked questions
How many kilocalories are in 1 calorie?
1 Calorie equals 0.001 kcal.
How do I convert calories to kilocalories?
Multiply the number of calories by 0.001. For example, 25 cal × 0.001 = 0.025 kcal.
What is 25 cal in kcal?
25 cal = 0.025 kcal.
How many calories are in 1 kilocalorie?
1 Kilocalorie equals 1,000 cal. Use the Kcal to Calories converter for the reverse direction.
Is this Calorie to Kilocalorie converter accurate?
Yes. It uses exact internationally defined conversion factors, calculated with full floating-point precision. Results are displayed rounded for readability.