Calorie (cal) to Kilocalorie (kcal)
1 cal = 0.001 kcal · Free instant converter, no signup required.
Direct Answer
1 cal = 0.001 kcal
Formula: kcal = cal × 0.001. This page supports instant conversion, reference table checks, and related unit links.
About this conversion
This Koverts page converts small calories (cal) to kilocalories (kcal) — the food-energy ‘Calorie’ is actually a kilocalorie, which confuses many labels.
The small calorie (cal) is the energy to raise 1 g of water by 1 °C. It appears in chemistry and physics contexts more than on grocery packaging.
The kilocalorie (kcal) is 1000 calories. Nutrition labels in many countries list energy in kcal (often labeled ‘Cal’ with a capital C) or kilojoules.
Typical uses
- Converting physics homework (cal) to nutrition thinking (kcal)
- Comparing kcal and kJ on international food labels
- Fitness apps that mix unit systems
- Teaching the calorie vs Calorie distinction
Common reference values
- 1 cal = 0.001 kcal
- 10 cal = 0.01 kcal
- 100 cal = 0.1 kcal
Tip: Divide calories by 1000 to get kilocalories. So 2500 cal = 2.5 kcal — but note that food labels usually already give kcal directly per serving.
Did you know? On food packaging, ‘Cal’ with a capital C traditionally meant kilocalorie — the same energy as 1000 small calories.
Educational reference — always verify critical measurements (medical, engineering, legal) with primary sources.
// calorie Conversion table kilocalorie
| Calorie (cal) (cal) | Kilocalorie (kcal) (kcal) |
|---|---|
| 1 cal | 0.001 kcal |
| 2 cal | 0.002 kcal |
| 5 cal | 0.005 kcal |
| 10 cal | 0.01 kcal |
| 20 cal | 0.02 kcal |
| 25 cal | 0.025 kcal |
| 50 cal | 0.05 kcal |
| 100 cal | 0.1 kcal |
| 250 cal | 0.25 kcal |
| 500 cal | 0.5 kcal |
| 1000 cal | 1 kcal |
How to convert
Calorie (cal) → Kilocalorie (kcal)
To convert from Calorie (cal) (cal) to Kilocalorie (kcal) (kcal)，multiply your value by 0.001.
For example，10 cal = 0.01 kcal.
// Frequently Asked Questions
Are food calories and physics calories the same unit?▼
How do I convert kcal to kJ?▼
What is 1 cal in kcal?▼
How is the conversion calculated?▼
Can I convert other values?▼
// Related conversions