Calories to Megajoules Converter
Convert calories (cal) to megajoules (MJ) instantly. Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Result
- Megajoules
- 4.184000e-6 MJ
How to use the calories to megajoules converter
- Enter the calories (cal).
- The results update as you type, or press Calculate.
- Read the megajoules first, then the supporting figures below it.
Formula
Megajoules = calories × 4.184000e-06
Worked example
For example, with these inputs:
- Calories (cal): 1
the calculator returns:
- Megajoules: 4.184000e-6 MJ
Calories to Megajoules table
| Calories | Megajoules |
|---|---|
| 1 cal | 4.184000e-6 MJ |
| 2 cal | 8.368000e-6 MJ |
| 5 cal | 2.092000e-5 MJ |
| 10 cal | 4.184000e-5 MJ |
| 20 cal | 8.368000e-5 MJ |
| 25 cal | 0.000105 MJ |
| 50 cal | 0.000209 MJ |
| 100 cal | 0.000418 MJ |
| 250 cal | 0.001046 MJ |
| 500 cal | 0.002092 MJ |
| 1,000 cal | 0.004184 MJ |
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 megajoules are in one calorie?
1 cal = 4.184000e-6 MJ.
How do I convert cal to MJ?
Megajoules = calories × 4.184000e-06.