Energy Converter

Convert joules, calories, kilowatt-hours, BTUs, and electronvolts for physics and everyday use.

Quick Converter

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Popular Energy Conversions

Joules to Calories

Convert joules to calories (thermochemical)

Calories to Joules

Convert thermochemical calories to joules

Kilowatt-Hours to Joules

Convert kWh to joules

Convert BTU to joules

Kilocalories to Kilojoules

Convert kcal to kJ

Kilojoules to Kilocalories

Convert kJ to kcal

All Energy Units

JouleJKilojoulekJMegajouleMJWatt-hourWhKilowatt-hourkWhCaloriecalKilocaloriekcalBritish Thermal UnitBTUElectronvolteVErgergFoot-poundft·lbf