Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
1 kJ to kWh 18 kJ to kWh 22 kJ to kWh 32 kJ to kWh 50 kJ to kWh 80 kJ to kWh 100 kJ to kWh 200 kJ to kWh 400 kJ to kWh 2,500 kJ to kWh 50,000 kJ to kWh 100,000 kJ to kWh
Reverse Conversions
1 kWh to kJ 5 kWh to kJ 10 kWh to kJ 16 kWh to kJ 22 kWh to kJ 25 kWh to kJ 40 kWh to kJ 48 kWh to kJ 200 kWh to kJ 2,500 kWh to kJ 5,000 kWh to kJ 10,000 kWh to kJ
More Energy Conversions
1 GJ to MJ 1 MJ to BTU 100 J to cal 1 GJ to kWh 2 GJ to MJ 2 MJ to BTU 100 kJ to kcal 1 MJ to kWh 10,000 J to kJ

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Popular Conversions

Kilowatt-Hours to Megajoules Megajoules to Kilowatt-Hours Joules to Calories Kilocalories to Kilojoules British Thermal Units to Joules Watt-Hours to Joules

Common Benchmarks

Microwave 10 minutes 0.17 kWh
Boil 1 liter water 334 kJ
Match stick 1 kJ
Slice of bread 330 kJ
Food calorie 4184 J
100 W bulb for 1 hour 0.1 kWh

Formula

kWh = kJ × 0.0002777778

Example

Example: convert 20 kilojoules to kilowatt-hours.

20 kJ = 0.00555556 kWh

Conversion table

kilojoules (kJ) kilowatt-hours (kWh)
1 kJ 0.00027778 kWh
2 kJ 0.00055556 kWh
5 kJ 0.00138889 kWh
10 kJ 0.00277778 kWh
20 kJ 0.00555556 kWh
50 kJ 0.01388889 kWh
100 kJ 0.02777778 kWh

Explanation

These are both units.

How to convert kilojoules to kilowatt-hours

  1. Start with the value in kilojoules (kJ).
  2. Multiply it by 0.0002777778.
  3. The result is the measurement in kilowatt-hours (kWh).

Example: 20 kJ → 0.00555556 kWh

Frequently Asked Questions

How much is 20 kilojoules in kilowatt-hours?

20 kilojoules is about 0.00555556 kilowatt-hours.

How many kilowatt-hours is 1 kilojoule?

1 kilojoule equals 0.000277777778 kilowatt-hours.

How many kilojoules is 1 kilowatt-hour?

1 kilowatt-hour equals 3600 kilojoules.

What is the difference between kilojoules and kilowatt-hours?

Both measure energy in SI. The main difference is usually scale: some units are convenient for smaller values, while others are used to express larger values more practically.

Where are kilojoules and kilowatt-hours used?

They are used in physics and engineering to measure work, energy, and heat; the most practical unit depends on the magnitude.

Why does 1 kilojoule equal 0.000277777778 kilowatt-hours?

Because the units are defined with a fixed relationship. To convert kilojoules to kilowatt-hours, multiply by that factor.