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Watt-hours to Kilowatt-hours Converter

Convert watt-hours (Wh) to kilowatt-hours (kWh), 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
0.001 kWh
joules (watt-seconds)
3,600 J
kilojoules
3.6 kJ
megajoules
0.0036 MJ
gigajoules
3.6 × 10⁻⁶ GJ
calories (thermochemical)
860.420650096 cal
kilocalories (food Calories)
0.860420650096 kcal
megacalories
0.000860420650096 Mcal
megawatt-hours
1 × 10⁻⁶ MWh
British thermal units (IT)
3.41214163313 Btu
million Btu
3.41214163313 × 10⁻⁶ MMBtu
therms (100,000 Btu)
3.41214163313 × 10⁻⁵ thm
quads (10¹⁵ Btu)
3.41214163313 × 10⁻¹⁵ quad
electronvolts
2.24694326681 × 10²² eV
kiloelectronvolts
2.24694326681 × 10¹⁹ keV
megaelectronvolts
2.24694326681 × 10¹⁶ MeV

1 Wh = 0.001 kWh

Show the working
  1. 1 Wh = 0.001 kWh
  2. 1 × 0.001 = 0.001 kWh

How to convert watt-hours to kilowatt-hours

1 Wh = 0.001 kWh, so multiply by 0.001 to go from watt-hours to kilowatt-hours. Going the other way, 1 kWh = 1,000 Wh.

kWh = Wh × 0.001
Wh = kWh × 1,000

Worked example:

1 Wh = 0.001 kWh
5 × 0.001 = 0.005 kWh

Watt-hours to kilowatt-hours table

Watt-hoursKilowatt-hours
1 Wh0.001 kWh
2 Wh0.002 kWh
3 Wh0.003 kWh
4 Wh0.004 kWh
5 Wh0.005 kWh
6 Wh0.006 kWh
7 Wh0.007 kWh
8 Wh0.008 kWh
9 Wh0.009 kWh
10 Wh0.01 kWh
15 Wh0.015 kWh
20 Wh0.02 kWh
25 Wh0.025 kWh
30 Wh0.03 kWh
40 Wh0.04 kWh
50 Wh0.05 kWh
75 Wh0.075 kWh
100 Wh0.1 kWh
250 Wh0.25 kWh
500 Wh0.5 kWh
1000 Wh1 kWh

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