Energy Converter
Convert between kilocalories, kilojoules, and other energy units instantly
Common Energy Conversions
About Energy Conversions
Energy conversion allows you to convert between different units of energy such as joules (J), calories (cal), kilocalories (kcal), kilojoules (kJ), watt-hours (Wh), and more. This is particularly useful for nutrition, physics, engineering, and understanding energy consumption in various contexts.
Converting Between Kilocalories and Kilojoules
Converting between kilocalories and kilojoules (kcal to kJ or kJ to kcal) is one of the most common energy conversions. This is particularly useful in nutrition and fitness, as food energy is often expressed in kilocalories (often simply called "calories" on food labels) in some countries and kilojoules in others.
To convert from kilocalories to kilojoules, multiply the energy value by 4.184. For example, 100 kcal equals 418.4 kJ (100 × 4.184 = 418.4).
To convert from kilojoules to kilocalories, divide the energy value by 4.184. For example, 500 kJ equals 119.5 kcal (500 ÷ 4.184 = 119.5).
Common Energy Conversions
Kilocalories to Kilojoules Conversion Table
| Kilocalories (kcal) | Kilojoules (kJ) |
|---|---|
| 100 kcal | 418.4 kJ |
| 200 kcal | 836.8 kJ |
| 300 kcal | 1255.2 kJ |
| 500 kcal | 2092.0 kJ |
| 1000 kcal | 4184.0 kJ |
| 2000 kcal | 8368.0 kJ |
| 2500 kcal | 10460.0 kJ |
Kilojoules to Kilocalories Conversion Table
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 100 kJ | 23.9 kcal |
| 200 kJ | 47.8 kcal |
| 500 kJ | 119.5 kcal |
| 1000 kJ | 239.0 kcal |
| 2000 kJ | 478.0 kcal |
| 5000 kJ | 1195.0 kcal |
| 8700 kJ | 2079.1 kcal |
Other Energy Units
Our converter also supports other energy units such as joules (J), calories (cal), watt-hours (Wh), kilowatt-hours (kWh), British thermal units (BTU), foot-pounds (ft⋅lb), and electronvolts (eV). Whether you're working with nutrition, physics, engineering, or just need to convert between different energy units, our energy converter provides quick and accurate conversions.