How many kilowatt-hours are in one kilojoule?

One kilojoule equals 0.000278 kWh. The formula is kWh = kJ × 0.000278.

How do I convert kilojoules to kilowatt-hours?

Multiply the value in kilojoules by 0.000278. For example, 100 × 0.000278 = 0.027778 — so 100 kJ = 0.027778 kWh.

How many kilojoules are in one kilowatt-hour?

One kilowatt-hour equals 3,600 kJ.

Pair · linear · factor 0.000278

kilojoules to kilowatt-hours

kJkWh

Active unit

kilojoules · ≈ 100,000 J (base)

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kJkilojoule100

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Frequently asked questions

A glowing emerald doughnut with a battery-and-lightning symbol at its centre, wrapped in a geometric grid, against a cosmic nebula in violet and magenta

Energy

How much energy is in a doughnut — calories, joules and kilowatt-hours

A calorie on your plate, a joule in the lab and a kilowatt-hour on your electricity bill all describe exactly the same thing: the ability to do work. One traditional doughnut holds about 407 watt-hours of energy — enough to run an efficient LED for more than a day, or charge a smartphone nearly 24 times. Here is how a single pastry ties together nutrition, physics and your power bill.

13 min