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Kilowatt-hours to Joules Converter

Convert kilowatt-hours (kWh) to joules (watt-seconds) (J), 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
3,600,000 J
kilojoules
3,600 kJ
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 = 3,600,000 J

Show the working
  1. 1 kWh = 3600000 J
  2. 1 × 3600000 = 3600000 J

How to convert kilowatt-hours to joules

1 kWh = 3,600,000 J, so multiply by 3,600,000 to go from kilowatt-hours to joules (watt-seconds). Going the other way, 1 J = 2.77777777778 × 10⁻⁷ kWh.

J = kWh × 3,600,000
kWh = J × 2.77777777778

Worked example:

1 kWh = 3600000 J
5 × 3600000 = 18000000 J

Kilowatt-hours to joules table

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

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).
Joules (J)
Joules (watt-seconds), 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