Kilocalories to Joules Converter
Convert kilocalories (kcal) to joules (J) instantly. Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Result
- Joules
- 4,184 J
How to use the kilocalories to joules converter
- Enter the kilocalories (kcal).
- The results update as you type, or press Calculate.
- Read the joules first, then the supporting figures below it.
Formula
Joules = kilocalories × 4,184
Worked example
For example, with these inputs:
- Kilocalories (kcal): 1
the calculator returns:
- Joules: 4,184 J
Kilocalories to Joules table
| Kilocalories | Joules |
|---|---|
| 1 kcal | 4,184 J |
| 2 kcal | 8,368 J |
| 5 kcal | 20,920 J |
| 10 kcal | 41,840 J |
| 20 kcal | 83,680 J |
| 25 kcal | 104,600 J |
| 50 kcal | 209,200 J |
| 100 kcal | 418,400 J |
| 250 kcal | 1,046,000 J |
| 500 kcal | 2,092,000 J |
| 1,000 kcal | 4,184,000 J |
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.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
Frequently asked questions
How many joules are in one kilocalorie?
1 kcal = 4,184 J.
How do I convert kcal to J?
Joules = kilocalories × 4,184.