Energy Converter
Convert joules, calories, watt-hours, kilowatt-hours, and BTU.
Formula: multiply the source value by 3,600
Quick Conversions
About this tool
Energy is converted through the joule. A thermochemical calorie is 4.184 J. A kilowatt-hour is 3.6 million joules.
How it works
Enter an energy value, choose the source and target units, and read the live result.
value_to = value_from Ă— (from_in_joules / to_in_joules)
Examples
1 kWh to kJ
1 Ă— 3,600,000 / 1,000 = 3,600 kJ.
FAQ
Is a calorie the same as a food Calorie?
Food labels use kilocalories (kcal). 1 kcal = 1,000 cal = 4,184 J.
What BTU is used here?
The International Table BTU, about 1,055.06 J.