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Joules to Watt-hours converter

Convert J to Wh instantly. Type any value and get the result in watt-hours. 1 J = 0.000277778 Wh.

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Energy›J → Wh
From
To
result below ↓
1 J=
0.000277778Wh
formula1 J = 0.000277778 Wh

Common joules → watt-hours

=0.000277778 Wh
=0.000555556 Wh
=0.00138889 Wh
=0.00277778 Wh
=0.00555556 Wh
=0.0138889 Wh
=0.0277778 Wh
=0.138889 Wh
=0.277778 Wh

Need a different value? .

Convert the other way
Watt-hours to Joules

How to convert joules to watt-hours

To convert joules to watt-hours, multiply the value by 0.000277778.

Formula
Wh = J × 0.000277778

For example:

  • →5 J = 0.00138889 Wh
  • →100 J = 0.0277778 Wh

Quick reference

  • ▸1 J = 0.000277778 Wh
  • ▸1 Wh = 3,600 J

When you need to convert J to Wh

  • ·Nutrition — converting calories to kilojoules on food labels.
  • ·Electricity bills — kWh consumption.
  • ·Heating — BTU ratings for furnaces.
  • ·Exercise — calorie burn during workouts.
  • ·Science — chemistry and physics problems.

Frequently asked

How many watt-hours are in 1 joule?
One joule equals 0.000277778 watt-hours.
How do I convert J to Wh in my head?
Multiply the value in joules by 0.000277778 to get watt-hours.
What is the formula for joules to watt-hours?
Wh = J × 0.000277778.
What is the reverse — how many joules in 1 watt-hour?
One watt-hour equals 3,600 joules.

Related conversions

Watt-hours to Joules
1 Wh = 3,600 J
Joules to Kilojoules
1 J = 0.001 kJ
Joules to Calories
1 J = 0.239006 cal
Joules to Kilocalories
1 J = 0.000239006 kcal
Kilojoules to Watt-hours
1 kJ = 0.277778 Wh
Calories to Watt-hours
1 cal = 0.00116222 Wh
Kilocalories to Watt-hours
1 kcal = 1.16222 Wh
Kilowatt-hours to Watt-hours
1 kWh = 1,000 Wh
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