Energy Converter

Value From

Joules-

Kilojoules-

Calories-

Kilocalories-

Watt-hours-

Kilowatt-hours-

BTU-

Foot-pounds-

Conversion factors

1 kWh = 3.6 million joules = 3,412 BTU = 860 kcal. 1 kcal (the "Calorie" on food labels) = 4.184 kJ = 1,000 small calories. 1 BTU = 1,055 J = 0.293 Wh.

Example: 2,000 kcal of food energy is 8,368 kJ or 2.32 kWh.

FAQ

How many kJ are in a calorie?

One food Calorie (kcal) is 4.184 kilojoules. Multiply kcal by 4.184 to get kJ.

How many BTU are in a kWh?

About 3,412 BTU.