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Joules to kilowatt-hours

1 joule in kilowatt-hours
1 J = 2.778 × 10^-7 kWh
kWh = J × 2.777777778 × 10^-7

To convert joules to kilowatt-hours, multiply by 2.777777778 × 10^-7. The table below gives the values people look up most often, and the converter works for any number.

Joules to kilowatt-hours table

Common joule values converted to kilowatt-hours.
Joules Kilowatt-hours
1 J 2.778 × 10^-7
2 J 5.556 × 10^-7
3 J 8.333 × 10^-7
4 J 0.000001111
5 J 0.000001389
10 J 0.000002778
15 J 0.000004167
20 J 0.000005556
25 J 0.000006944
30 J 0.000008333
40 J 0.00001111
50 J 0.00001389
75 J 0.00002083
100 J 0.00002778
250 J 0.00006944
500 J 0.0001389
1,000 J 0.0002778

How the conversion works

The relationship is kWh = J × 2.777777778 × 10^-7. Both units measure energy, so the conversion is a fixed factor that never changes.

Common questions

How many kilowatt-hours are in one joule?
One joule equals 2.778 × 10^-7 kilowatt-hours. kWh = J × 2.777777778 × 10^-7.
How do you convert joules to kilowatt-hours?
Use kWh = J × 2.777777778 × 10^-7. So 10 J is 0.000002778 kWh.
How many joules are in one kilowatt-hour?
One kilowatt-hour equals 3,600,000 joules, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked