Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
51.2 MJ to kWh 70.4 MJ to kWh 76.8 MJ to kWh 100 MJ to kWh 154 MJ to kWh 256 MJ to kWh 640 MJ to kWh 2,500 MJ to kWh 5,000 MJ to kWh 25,000 MJ to kWh 50,000 MJ to kWh 100,000 MJ to kWh
Reverse Conversions
1 kWh to MJ 5 kWh to MJ 50 kWh to MJ 57.6 kWh to MJ 70.4 kWh to MJ 76.8 kWh to MJ 102 kWh to MJ 154 kWh to MJ 250 kWh to MJ 10,000 kWh to MJ 50,000 kWh to MJ 100,000 kWh to MJ
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
Phone battery 40 kJ
Gasoline liter 34 MJ
AA battery 10 kJ
Slice of bread 330 kJ
Cup of coffee 5 kJ

Formula

kWh = MJ × 0.2777777778

Example

Example: convert 64 megajoules to kilowatt-hours.

64 MJ = 17.77777778 kWh

Conversion table

megajoules (MJ) kilowatt-hours (kWh)
1 MJ 0.27777778 kWh
2 MJ 0.55555556 kWh
5 MJ 1.38888889 kWh
10 MJ 2.77777778 kWh
20 MJ 5.55555556 kWh
50 MJ 13.88888889 kWh
100 MJ 27.77777778 kWh

Explanation

These are both units.

How to convert megajoules to kilowatt-hours

  1. Start with the value in megajoules (MJ).
  2. Multiply it by 0.2777777778.
  3. The result is the measurement in kilowatt-hours (kWh).

Example: 64 MJ → 17.77777778 kWh

Frequently Asked Questions

How much is 64 megajoules in kilowatt-hours?

64 megajoules is about 17.7778 kilowatt-hours.

How many kilowatt-hours is 1 megajoule?

1 megajoule equals 0.277777777778 kilowatt-hours.

How many megajoules is 1 kilowatt-hour?

1 kilowatt-hour equals 3.6 megajoules.

What is the difference between megajoules 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 megajoules 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 megajoule equal 0.277777777778 kilowatt-hours?

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