Kilowatt-Hours to Joules

1 kWh = 3,600,000 J

From

How to convert kilowatt-hours to joules

J = kWh × 3,600,000

Example: 5 kWh = 18,000,000 J

Kilowatt-Hours to Joules conversion table

Kilowatt-Hours (kWh)	Joules (J)
1 kWh	3,600,000 J
2 kWh	7,200,000 J
3 kWh	10,800,000 J
4 kWh	14,400,000 J
5 kWh	18,000,000 J
6 kWh	21,600,000 J
7 kWh	25,200,000 J
8 kWh	28,800,000 J
9 kWh	32,400,000 J
10 kWh	36,000,000 J
15 kWh	54,000,000 J
20 kWh	72,000,000 J
25 kWh	90,000,000 J
30 kWh	108,000,000 J
40 kWh	144,000,000 J
50 kWh	180,000,000 J
75 kWh	270,000,000 J
100 kWh	360,000,000 J
250 kWh	900,000,000 J
500 kWh	1,800,000,000 J
1,000 kWh	3,600,000,000 J

About the units

Kilowatt-Hours: The kilowatt-hour is the energy used by a 1 kW device in one hour, equal to 3.6 megajoules. Electricity bills are measured in kWh.

Joules: The joule is the SI unit of energy, equal to the work done by a force of one newton over one meter.

Frequently asked questions

How many joules are in 1 kilowatt-hour?

1 kilowatt-hour equals 3,600,000 joules.

How many kilowatt-hours are in 1 joule?

1 joule equals 2.77778E-7 kilowatt-hours.

How do I convert kilowatt-hours to joules?

Use the formula J = kWh × 3,600,000.

What is 10 kilowatt-hours in joules?

10 kilowatt-hours equals 36,000,000 joules.

Related conversions

Factors: NIST SP 811 · SI Brochure · NIST Handbook 44 — Updated October 17, 2026