Convert energy between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, British thermal units and foot-pounds instantly. This free converter runs entirely in your browser and updates as you type. Enter an energy value and choose your units to see the result.
Formula: result = value x (from unit in joules / to unit in joules). For example, 1 kilocalorie = 4184 / 1000 kilojoules.