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Watt-hours to Kilojoules converter

Convert Wh to kJ instantly. Type any value and get the result in kilojoules. 1 Wh = 3.6 kJ.

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Energy›Wh → kJ
From
To
result below ↓
1 Wh=
3.6kJ
formula1 Wh = 3.6 kJ

Common watt-hours → kilojoules

=3.6 kJ
=7.2 kJ
=18 kJ
=36 kJ
=72 kJ
=180 kJ
=360 kJ
=1,800 kJ
=3,600 kJ

Need a different value? .

Convert the other way
Kilojoules to Watt-hours

How to convert watt-hours to kilojoules

To convert watt-hours to kilojoules, multiply the value by 3.6.

Formula
kJ = Wh × 3.6

For example:

  • →5 Wh = 18 kJ
  • →100 Wh = 360 kJ

Quick reference

  • ▸1 Wh = 3.6 kJ
  • ▸1 kJ = 0.277778 Wh

When you need to convert Wh to kJ

  • ·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 kilojoules are in 1 watt-hour?
One watt-hour equals 3.6 kilojoules.
How do I convert Wh to kJ in my head?
Multiply the value in watt-hours by 3.6 to get kilojoules.
What is the formula for watt-hours to kilojoules?
kJ = Wh × 3.6.
What is the reverse — how many watt-hours in 1 kilojoule?
One kilojoule equals 0.277778 watt-hours.

Related conversions

Kilojoules to Watt-hours
1 kJ = 0.277778 Wh
Watt-hours to Joules
1 Wh = 3,600 J
Watt-hours to Calories
1 Wh = 860.421 cal
Watt-hours to Kilocalories
1 Wh = 0.860421 kcal
Joules to Kilojoules
1 J = 0.001 kJ
Calories to Kilojoules
1 cal = 0.004184 kJ
Kilocalories to Kilojoules
1 kcal = 4.184 kJ
Kilowatt-hours to Kilojoules
1 kWh = 3,600 kJ
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