Energy

Energy Conversions

Joules, kilojoules, calories, kilocalories, kilowatt-hours, BTU. Pick a starting unit below — every conversion to every other unit in this category is a click away.

Energy Conversions

Joules (J)

Kilojoules (kJ)

Megajoules (MJ)

Calories (cal)

Kilocalories (kcal)

Watt-hours (Wh)

Kilowatt-hours (kWh)

BTU (BTU)

Foot-pounds (ft·lb)