Energy Converter

Convert between chemical, electrical and physical energy units.

Energy
6
Printable Chart
Related Conversions
1 kJ to kWh 4 kJ to kWh 4.5 kJ to kWh 12 kJ to kWh 20 kJ to kWh 50 kJ to kWh 100 kJ to kWh 1,000 kJ to kWh 2,500 kJ to kWh 5,000 kJ to kWh 10,000 kJ to kWh 100,000 kJ to kWh
Reverse Conversions
1 kWh to kJ 4 kWh to kJ 4.5 kWh to kJ 5.5 kWh to kJ 6 kWh to kJ 250 kWh to kJ 500 kWh to kJ 2,500 kWh to kJ 5,000 kWh to kJ 10,000 kWh to kJ 25,000 kWh to kJ 50,000 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

Trending Now

Days Until New Year 0 °F to °C 1000 ft² to m² Days Until Halloween Days Until Christmas Age Calculator 1000 J to calories 1 oz to grams Week Number FIFA World Cup 2026

Recent Tools

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

Cup of coffee 5 kJ
Slice of bread 330 kJ
1 kWh 3.6 MJ
Phone battery 40 kJ
Match stick 1 kJ
AA battery 10 kJ

Formula

kWh = kJ × 0.0002777778

Example

Example: convert 5 kilojoules to kilowatt-hours.

5 kJ = 0.00138889 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: 5 kJ → 0.00138889 kWh

Frequently Asked Questions

How much is 5 kilojoules in kilowatt-hours?

5 kilojoules is about 0.00138889 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.