Convert energy across scientific, nutritional, and electrical units, from joules to food calories to kilowatt-hours.
How it works
- Select the initial energy format and the format you want to translate to.
- Input your energy value.
- Read the converted result.
Frequently asked questions
Is a food Calorie the same as a calorie?
No — the dietary Calorie (capital C) is 1000 small calories, i.e. a kilocalorie. This trips up many conversions.
How many joules in a kWh?
Exactly 3.6 million (3,600,000 J), since 1 watt for 1 hour is 3600 J.
Where are these units used?
Joules in physics, calories in nutrition, kWh on electricity bills.