Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
10 GJ to kWh 25 GJ to kWh 50 GJ to kWh 400 GJ to kWh 450 GJ to kWh 550 GJ to kWh 1,200 GJ to kWh 2,000 GJ to kWh 2,500 GJ to kWh 10,000 GJ to kWh 25,000 GJ to kWh 100,000 GJ to kWh
Reverse Conversions
1 kWh to GJ 5 kWh to GJ 10 kWh to GJ 50 kWh to GJ 450 kWh to GJ 500 kWh to GJ 600 kWh to GJ 800 kWh to GJ 1,200 kWh to GJ 2,500 kWh to GJ 5,000 kWh to GJ 100,000 kWh to GJ
More Energy Conversions
1 MJ to BTU 100 J to cal 1 GJ to kWh 1 GJ to MJ 2 MJ to BTU 100 kJ to kcal 1 MJ to kWh 2 GJ to MJ 10 BTU to J

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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

Cup of coffee 5 kJ
100 W bulb for 1 hour 0.1 kWh
Match stick 1 kJ
Food calorie 4184 J
Laptop full charge 200 kJ
1 kWh 3.6 MJ

Formula

kWh = GJ × 277.7777777778

Example

Example: convert 500 gigajoules to kilowatt-hours.

500 GJ = 138888.88888889 kWh

Conversion table

gigajoules (GJ) kilowatt-hours (kWh)
1 GJ 277.77777778 kWh
2 GJ 555.55555556 kWh
5 GJ 1388.88888889 kWh
10 GJ 2777.77777778 kWh
20 GJ 5555.55555556 kWh
50 GJ 13888.88888889 kWh
100 GJ 27777.77777778 kWh

Explanation

These are both units.

How to convert gigajoules to kilowatt-hours

  1. Start with the value in gigajoules (GJ).
  2. Multiply it by 277.7777777778.
  3. The result is the measurement in kilowatt-hours (kWh).

Example: 500 GJ → 138888.88888889 kWh

Frequently Asked Questions

How much is 500 gigajoules in kilowatt-hours?

500 gigajoules is about 138888.89 kilowatt-hours.

How many kilowatt-hours is 1 gigajoule?

1 gigajoule equals 277.77777778 kilowatt-hours.

How many gigajoules is 1 kilowatt-hour?

1 kilowatt-hour equals 0.0036 gigajoules.

What is the difference between gigajoules 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 gigajoules 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 gigajoule equal 277.77777778 kilowatt-hours?

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