⚡ Energy converter

Joule to Kilowatt-hour Converter

Convert joules (J) to kilowatt hours (kWh) instantly with the exact formula, a conversion table and chart.

J

Results

Kilowatt Hours
2.77777778e-7 kWh
Same value in every unit

📊 Joule to Kilowatt-hour chart

Joule to Kilowatt-hour — plotted against joule (j).

How to convert joules to kilowatt hours

To convert joules to kilowatt hours, multiply by 2.77777778e-7. Energy conversions connect nutrition, electricity bills, heating systems and physics.

kWh = J × 2.77777778e-7 J = kWh ÷ 2.77777778e-7
Joule to Kilowatt-hour conversion – J to kWh formula illustration
Joule (J) → Kilowatt-hour (kWh) at a glance.

Joule to Kilowatt-hour conversion table

Joule (J)Kilowatt-hour (kWh)
0.1 J2.77777778e-8 kWh
0.5 J1.38888889e-7 kWh
1 J2.77777778e-7 kWh
2 J5.55555556e-7 kWh
3 J8.33333333e-7 kWh
4 J0.00000111111111111 kWh
5 J0.00000138888888889 kWh
10 J0.00000277777777778 kWh
20 J0.00000555555555556 kWh
25 J0.00000694444444444 kWh
50 J0.0000138888888889 kWh
100 J0.0000277777777778 kWh
500 J0.000138888888889 kWh
1,000 J0.000277777777778 kWh

About the units

Joule (J)

The joule is the SI unit of energy, the work done by one newton over one meter.

Kilowatt-hour (kWh)

A kilowatt-hour equals 3.6 million joules and is the unit on electricity bills.

How to use this converter

  1. Type the number of joules (J) in the input box.
  2. The result in kilowatt hours appears instantly — no button needed.
  3. See the same value in every other energy unit just below.
  4. Use “Swap units” to convert kilowatt hours back to joules.

Tips for better results

  • Double-check which system a unit belongs to (for example US vs UK gallons).
  • Use the swap button to convert in the opposite direction instantly.
  • Bookmark the conversions you use most — each pair has its own page.

Frequently asked questions

How many kilowatt hours are in one joule?

One joule equals 2.77777778e-7 kilowatt hours. 2.77777778e-7 is the exact factor used by this converter.

How do I convert joules to kilowatt hours?

Multiply the value in joules by 2.77777778e-7. To go the other way, multiply kilowatt hours by 3,600,000.

What is 10 J in kWh?

10 J = 0.00000277777777778 kWh. Also, 5 J = 0.00000138888888889 kWh and 100 J = 0.0000277777777778 kWh.

What is the difference between a joule and a kilowatt-hour?

The joule is the SI unit of energy, the work done by one newton over one meter. A kilowatt-hour equals 3.6 million joules and is the unit on electricity bills.

Is this tool free and private?

Yes — the Joule to Kilowatt-hour is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.

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