kWh to Wh Converter

How to convert kilowatt-hours to watt-hours

FormulaWh = kWh × 1,000

Multiply the value in kilowatt-hours by 1,000. To go the other way, multiply by 0.001 (or divide by 1,000).

A kilowatt-hour is larger than a watt-hour: one kilowatt-hour contains 1,000 watt-hours.

Worked examples

1 kilowatt-hour1 kWh × 1,000 = 1,000 Wh
5 kilowatt-hours5 kWh × 1,000 = 5,000 Wh
10 kilowatt-hours10 kWh × 1,000 = 10,000 Wh
20 kilowatt-hours20 kWh × 1,000 = 20,000 Wh
100 kilowatt-hours100 kWh × 1,000 = 100,000 Wh

Kilowatt-hours to watt-hours conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Kilowatt-hours to watt-hours: 0.1–10 kWh
Kilowatt-hours (kWh)	Watt-hours (Wh)
0.1 kWh	100 Wh
0.25 kWh	250 Wh
0.5 kWh	500 Wh
1 kWh	1,000 Wh
2 kWh	2,000 Wh
3 kWh	3,000 Wh
4 kWh	4,000 Wh
5 kWh	5,000 Wh
6 kWh	6,000 Wh
7 kWh	7,000 Wh
8 kWh	8,000 Wh
9 kWh	9,000 Wh
10 kWh	10,000 Wh

Kilowatt-hours to watt-hours: 12–1,000 kWh
Kilowatt-hours (kWh)	Watt-hours (Wh)
12 kWh	12,000 Wh
15 kWh	15,000 Wh
20 kWh	20,000 Wh
25 kWh	25,000 Wh
30 kWh	30,000 Wh
40 kWh	40,000 Wh
50 kWh	50,000 Wh
75 kWh	75,000 Wh
100 kWh	100,000 Wh
250 kWh	250,000 Wh
500 kWh	500,000 Wh
1,000 kWh	1,000,000 Wh

About the units

Kilowatt-hour (kWh)

Exactly 3.6 MJ. The unit on electricity bills; running a 1,000 W heater for an hour uses 1 kWh. One kilowatt-hour equals 3,600,000 joules (J).

Watt-hour (Wh)

One watt sustained for an hour: 3,600 J. Battery capacities are rated in Wh.

Frequently asked questions

How many watt-hours are in one kilowatt-hour?

There are 1,000 watt-hours in one kilowatt-hour, and this value is exact by definition.

How do I convert kilowatt-hours to watt-hours?

Multiply the number of kilowatt-hours by 1,000. For example, 10 kWh × 1,000 = 10,000 Wh.

How many kilowatt-hours are in one watt-hour?

One watt-hour equals 0.001 kilowatt-hours. That is the reverse factor, 1 ÷ 1,000.

What is 10 kilowatt-hours in watt-hours?

10 kWh = 10,000 Wh.

Is this kWh to Wh converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.