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Kilowatt-hours to Kilojoules Converter

Convert kilowatt-hours (kWh) to kilojoules (kJ), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
3,600 kJ
joules (watt-seconds)
3,600,000 J
megajoules
3.6 MJ
gigajoules
0.0036 GJ
calories (thermochemical)
860,420.650096 cal
kilocalories (food Calories)
860.420650096 kcal
megacalories
0.860420650096 Mcal
watt-hours
1,000 Wh
megawatt-hours
0.001 MWh
British thermal units (IT)
3,412.14163313 Btu
million Btu
0.00341214163313 MMBtu
therms (100,000 Btu)
0.0341214163313 thm
quads (10¹⁵ Btu)
3.41214163313 × 10⁻¹² quad
electronvolts
2.24694326681 × 10²⁵ eV
kiloelectronvolts
2.24694326681 × 10²² keV
megaelectronvolts
2.24694326681 × 10¹⁹ MeV

1 kWh = 3,600 kJ

Show the working
  1. 1 kWh = 3600 kJ
  2. 1 × 3600 = 3600 kJ

How to convert kilowatt-hours to kilojoules

1 kWh = 3,600 kJ, so multiply by 3,600 to go from kilowatt-hours to kilojoules. Going the other way, 1 kJ = 0.000277777777778 kWh.

kJ = kWh × 3,600
kWh = kJ × 0.000277777777778

Worked example:

1 kWh = 3600 kJ
5 × 3600 = 18000 kJ

Kilowatt-hours to kilojoules table

Kilowatt-hoursKilojoules
1 kWh3,600 kJ
2 kWh7,200 kJ
3 kWh10,800 kJ
4 kWh14,400 kJ
5 kWh18,000 kJ
6 kWh21,600 kJ
7 kWh25,200 kJ
8 kWh28,800 kJ
9 kWh32,400 kJ
10 kWh36,000 kJ
15 kWh54,000 kJ
20 kWh72,000 kJ
25 kWh90,000 kJ
30 kWh108,000 kJ
40 kWh144,000 kJ
50 kWh180,000 kJ
75 kWh270,000 kJ
100 kWh360,000 kJ
250 kWh900,000 kJ
500 kWh1,800,000 kJ
1000 kWh3,600,000 kJ

About the units

Kilowatt-hours (kWh)
Kilowatt-hours, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).

Formula version 0.1.0Reviewed