Calories to Joules Converter
Convert calories (cal) 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 calories to joules converter
- Enter the calories (cal).
- The results update as you type, or press Calculate.
- Read the joules first, then the supporting figures below it.
Formula
Joules = calories × 4.184
Worked example
For example, with these inputs:
- Calories (cal): 1
the calculator returns:
- Joules: 4.184 J
Calories to Joules table
| Calories | Joules |
|---|---|
| 1 cal | 4.184 J |
| 2 cal | 8.368 J |
| 5 cal | 20.92 J |
| 10 cal | 41.84 J |
| 20 cal | 83.68 J |
| 25 cal | 104.6 J |
| 50 cal | 209.2 J |
| 100 cal | 418.4 J |
| 250 cal | 1,046 J |
| 500 cal | 2,092 J |
| 1,000 cal | 4,184 J |
About this conversion
Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
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.
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.
Frequently asked questions
How many joules are in one calorie?
1 cal = 4.184 J.
How do I convert cal to J?
Joules = calories × 4.184.