Joules to Kilowatt-Hours (J to kWh) Converter

Joules to Kilowatt-Hours

1 joule = 2.7777778 × 10^−7 kilowatt-hours. To convert joules (J) to kilowatt-hours (kWh), divide by 3,600,000.

Joules (J)

Kilowatt-hours (kWh)

How to convert joules to kilowatt-hours

kWh = J ÷ 3,600,000

Example: convert 8 joules to kilowatt-hours.
8 J ÷ 3,600,000 = 0.000002222222 kWh

The same relationship in reverse: 1 kilowatt-hour = 3,600,000 joules, so you can also multiply by 2.7777778 × 10^−7. Need the other direction? Use the kilowatt-hours to joules converter.

You will typically need this conversion for physics homework and comparing energy sources.

Joules to Kilowatt-Hours conversion chart

Joules (J)	Kilowatt-Hours (kWh)
1 J	2.7777778 × 10^−7 kWh
2 J	5.5555556 × 10^−7 kWh
3 J	8.3333333 × 10^−7 kWh
4 J	0.000001111111 kWh
5 J	0.000001388889 kWh
6 J	0.000001666667 kWh
7 J	0.000001944444 kWh
8 J	0.000002222222 kWh
9 J	0.0000025 kWh
10 J	0.000002777778 kWh
15 J	0.000004166667 kWh
20 J	0.000005555556 kWh
25 J	0.000006944444 kWh
30 J	0.000008333333 kWh
40 J	0.000011111111 kWh
50 J	0.000013888889 kWh
75 J	0.000020833333 kWh
100 J	0.000027777778 kWh
250 J	0.000069444444 kWh
500 J	0.00013888889 kWh
1,000 J	0.00027777778 kWh

Values rounded to 8 significant figures. The converter above shows up to 12.

About the units

Joule (J)

The SI unit of energy: the work done by a force of one newton over one meter, or one watt for one second.

Kilowatt-Hour (kWh)

1,000 watt-hours or 3.6 MJ — the "unit" on your electricity bill.

Frequently asked questions

How many kilowatt-hours are in a joule?

1 joule = 2.7777778 × 10^−7 kilowatt-hours. Going the other way, 1 kilowatt-hour = 3,600,000 joules.

How do I convert joules to kilowatt-hours?

To convert joules to kilowatt-hours, divide by 3,600,000. The formula is kWh = J ÷ 3,600,000.

What is 8 J in kWh?

8 joules is 0.000002222222 kilowatt-hours (8 J ÷ 3,600,000 = 0.000002222222 kWh).