THE RIGHT UNIT. THE CLEAR ANSWER.

Joule converter.

Convert work, heat, and electrical energy. Calories use the thermochemical convention; BTU uses the international table.

Energy converter

Precision

From

0.001kJ

THE RESULT

1 J = 0.001 kJ

Calculated in your browserFormula & conversion table

ONE VALUE, EVERY UNIT

Joule equivalents

Value

Convert to	Result	Calculator
Kilojoule (kJ)	0.001 kJ
Megajoule (MJ)	0.000001 MJ
Calorie (thermochemical) (cal)	0.2390057361 cal
Kilocalorie (kcal)	0.0002390057361 kcal
Watt-hour (Wh)	0.0002777777778 Wh
Kilowatt-hour (kWh)	2.777777778e-7 kWh
BTU (IT) (BTU)	0.0009478171203 BTU
Electronvolt (eV)	6.241509074e18 eV

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Convert joule to…

kJKilojoule MJMegajoule calCalorie (thermochemical)kcalKilocalorie WhWatt-hour kWhKilowatt-hour BTUBTU (IT)eVElectronvolt

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Explore energy conversions

The conversions you reach for.

kWh→JKilowatt-hour to Joule kWh→kJKilowatt-hour to Kilojoule kWh→MJKilowatt-hour to Megajoule kWh→calKilowatt-hour to Calorie (thermochemical)kWh→kcalKilowatt-hour to Kilocalorie kWh→WhKilowatt-hour to Watt-hour kWh→BTUKilowatt-hour to BTU (IT)kWh→eVKilowatt-hour to Electronvolt

About energy conversions

Convert work, heat, and electrical energy. Calories use the thermochemical convention; BTU uses the international table.

Each unit is defined relative to one common base unit, so the same factors work consistently in both directions. Select any unit above to see its conversion formula, a worked example, and a reference table.

How precision and conventions work