Joules to Kilowatt-hours – joule to kilowatt-hour Converter

1 J ≈ 2.77778e-7 kWh

joules (J)

kilowatt-hours (kWh)2.77778e-7

Formula

kWh = J × ≈ 2.77778e-7

Joules to kilowatt-hours conversion table

joules (J)	kilowatt-hours (kWh)
0.5 J	1.38889e-7 kWh
1 J	≈ 2.77778e-7 kWh
2 J	5.55556e-7 kWh
3 J	8.33333e-7 kWh
5 J	0.00000138889 kWh
10 J	0.00000277778 kWh
20 J	0.00000555556 kWh
25 J	0.00000694444 kWh
50 J	0.0000138889 kWh
75 J	0.0000208333 kWh
100 J	0.0000277778 kWh
250 J	0.0000694444 kWh
500 J	0.000138889 kWh
1000 J	0.000277778 kWh
5000 J	0.00138889 kWh

Joules and kilowatt-hours are both energy units. One joule is approximately 2.77778e-7 kilowatt-hours; enter any value above for an instant result, or use the table for common conversions.

Sanity-check examples

1 J = 2.77778e-7 kWh
10 J = 0.00000277778 kWh
2.5 J = 6.94444e-7 kWh

Common pitfalls and look-alike units

The "Calorie" on food labels and in fitness is the kilocalorie (kcal): 1 kcal = 4184 J, and the small calorie (cal) is one thousandth of it. This page uses the thermochemical calorie (1 cal = 4.184 J); the International Steam Table calorie is about 4.1868 J, so values differ slightly. The "degree" (度) on a Chinese electricity bill is one kilowatt-hour, and 1 kWh = 3600 kJ.

Frequently asked questions

How many kilowatt-hours are in a joule?

1 joule (J) is approximately 2.77778e-7 kilowatt-hour (kWh).

How do I convert joules to kilowatt-hours?

Multiply the joule value by ≈ 2.77778e-7 to get kilowatt-hour — for example, 2 joules = 5.55556e-7 kilowatt-hour.

How do I convert kilowatt-hours back to joules?

1 kilowatt-hour equals 3600000 joule. Use the swap button or the reverse conversion page linked on this page.

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