Kilocalories to Kilojoules Converter
Convert kilocalories (kcal) to kilojoules (kJ) instantly. Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Result
- Kilojoules
- 4.184 kJ
How to use the kilocalories to kilojoules converter
- Enter the kilocalories (kcal).
- The results update as you type, or press Calculate.
- Read the kilojoules first, then the supporting figures below it.
Formula
Kilojoules = kilocalories × 4.184
Worked example
For example, with these inputs:
- Kilocalories (kcal): 1
the calculator returns:
- Kilojoules: 4.184 kJ
Kilocalories to Kilojoules table
| Kilocalories | Kilojoules |
|---|---|
| 1 kcal | 4.184 kJ |
| 2 kcal | 8.368 kJ |
| 5 kcal | 20.92 kJ |
| 10 kcal | 41.84 kJ |
| 20 kcal | 83.68 kJ |
| 25 kcal | 104.6 kJ |
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
| 250 kcal | 1,046 kJ |
| 500 kcal | 2,092 kJ |
| 1,000 kcal | 4,184 kJ |
About this conversion
Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Frequently asked questions
How many kilojoules are in one kilocalorie?
1 kcal = 4.184 kJ.
How do I convert kcal to kJ?
Kilojoules = kilocalories × 4.184.