Energy Converter
Convert energy units: joules, calories, kilocalories, kWh, watt-hours and BTU.
Energy Converter
About the Energy Converter
Convert energy between joules, calories, food kilocalories, kilowatt-hours and BTU. Use it for nutrition labels, electricity bills, heating and physics homework.
How to Use the Energy Converter
- Enter the amount of energy.
- Choose the units to convert from and to.
- Press Calculate.
Formula and How It Works
1 calorie = 4.184 joules and 1 kilocalorie (food Calorie) = 4,184 J. 1 kWh = 3,600,000 J and 1 BTU = 1,055.06 J.
Frequently Asked Questions
Are food calories the same as calories?
A food Calorie on a label is actually a kilocalorie (1,000 small calories).
How many joules are in a kWh?
3.6 million joules.