About This Calculator
This calculator converts energy between kilojoules (kJ) and kilocalories (kcal), useful for interpreting nutrition labels and calculating energy needs. It supports two-way conversion using the standard factor.
How It Works
- Select conversion direction: kJ to kcal or kcal to kJ.
- Enter the energy value to convert.
- The calculator uses:
kcal = kJ ÷ 4.184
kJ = kcal × 4.184
Note: 1 kcal = 4.184 kJ (exact, defined).
Kilojoules to Kilocalories Conversion Table
| kJ | kcal |
|---|---|
| 100 kJ | 23.90 kcal |
| 250 kJ | 59.82 kcal |
| 500 kJ | 119.63 kcal |
| 750 kJ | 179.42 kcal |
| 1000 kJ | 239.00 kcal |
| 1250 kJ | 298.75 kcal |
| 1500 kJ | 358.50 kcal |
| 2000 kJ | 478.00 kcal |
| 2500 kJ | 597.50 kcal |
| 3000 kJ | 717.01 kcal |
Frequently Asked Questions
Can I convert both ways?
Yes, toggle between kJ to kcal and kcal to kJ using the selector.
Is kcal the same as Cal?
Yes. In nutrition, 1 kcal = 1 Calorie.
Why use kJ?
Many countries use kJ on food labels. Converting ensures clarity when reading international packaging.
How precise is this?
It uses the exact scientific factor: 1 kcal = 4.184 kJ.