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Convert joules to watt hours (Joules to Watt-hours)

Convert joules to wh instantly (Joules to Watt-hours). 1 J = 0.0002777777778 Wh.

Converter

joule (J)
watt-hour (Wh)

J to Wh conversion table

JoulesWatt-hours
1 J0.00027777778 Wh
2 J0.00055555556 Wh
5 J0.0013888889 Wh
10 J0.0027777778 Wh
25 J0.0069444444 Wh
50 J0.013888889 Wh
100 J0.027777778 Wh
1000 J0.27777778 Wh

Formula

Wh = J × 0.0002777777778

Worked example

25 J × 0.0002777777778 = 0.006944444444 Wh

Popular conversion examples

Choose an example to open this converter with the value filled in. These are useful examples, not a claim about search rankings.

  • 1 J to Wh

    0.000277778 Wh. Open the full joules to wh converter.

    convertly.website/joules-to-wh/?value=1
  • 5 J to Wh

    0.00138889 Wh. Open the full joules to wh converter.

    convertly.website/joules-to-wh/?value=5
  • 100 J to Wh

    0.0277778 Wh. Open the full joules to wh converter.

    convertly.website/joules-to-wh/?value=100
  • 10 J to Wh

    0.00277778 Wh. Open the full joules to wh converter.

    convertly.website/joules-to-wh/?value=10
  • 1 Wh to J

    3600 J. Open the full wh to joules converter.

    convertly.website/wh-to-joules/?value=1
  • 5.625 Wh to J

    20250 J. Open the full wh to joules converter.

    convertly.website/wh-to-joules/?value=5.625

About joules and watt-hours

Joule (J)

The joule is the SI unit of energy and work: one newton-meter. It is used in physics, engineering and electrical energy ratings.

Watt-hour (Wh)

A watt-hour is the energy used by 1 watt over one hour: exactly 3,600 joules. It is used for battery capacity and small appliances.

Both are units of energy; the base unit used internally is J.

Notes

J to Wh FAQs

How do I convert joules to watt-hours?

Multiply the number of joules by 0.0002777777778 (equivalently, divide by 3600) to get watt-hours. For example, 25 J × 0.0002777777778 = 0.00694444 Wh.

How many watt-hours are in one joule?

1 J = 0.0002777777778 Wh and 1 Wh = 3600 J. To go the other way, use the watt-hours to joules converter.

How many watt-hours are in 87500 joules?

87500 J = 24.3056 Wh, rounded to 6 significant digits. Change the value in the converter above for any other amount.

How many watt-hours are in 2260000 joules?

2260000 J = 627.778 Wh, rounded to 6 significant digits.

Is the J to Wh conversion exact?

The ratio is exact by definition, but its decimal form does not end (0.000277777777778… to 12 significant digits). The converter keeps full precision internally and rounds only the displayed answer, which you can set from 4 to 12 significant digits.

What is the difference between joules and watt-hours?

The joule is the SI unit of energy and work: one newton-meter. It is used in physics, engineering and electrical energy ratings. A watt-hour is the energy used by 1 watt over one hour: exactly 3,600 joules. It is used for battery capacity and small appliances.

Is a kilowatt-hour the same as a kilowatt?

No. A kilowatt (kW) is a rate of using energy, while a kilowatt-hour (kWh) is an amount of energy. A 2 kW heater running for 3 hours uses 6 kWh, which is 21600 kJ.

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