Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
10 MJ to GJ 25 MJ to GJ 50 MJ to GJ 250 MJ to GJ 500 MJ to GJ 2,500 MJ to GJ 4,400 MJ to GJ 6,050 MJ to GJ 6,600 MJ to GJ 10,000 MJ to GJ 22,000 MJ to GJ 50,000 MJ to GJ
Reverse Conversions
1 GJ to MJ 10 GJ to MJ 25 GJ to MJ 50 GJ to MJ 100 GJ to MJ 2,500 GJ to MJ 4,950 GJ to MJ 5,000 GJ to MJ 8,800 GJ to MJ 13,200 GJ to MJ 50,000 GJ to MJ 110,000 GJ to MJ
More Energy Conversions
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 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

100 W bulb for 1 hour 0.1 kWh
Boil 1 liter water 334 kJ
Cup of coffee 5 kJ
Match stick 1 kJ
Phone battery 40 kJ
Food calorie 4184 J

Formula

GJ = MJ × 0.001

Example

Example: convert 5500.000000000001 megajoules to gigajoules.

5500.000000000001 MJ = 5.5 GJ

Conversion table

megajoules (MJ) gigajoules (GJ)
1 MJ 0.001 GJ
2 MJ 0.002 GJ
5 MJ 0.005 GJ
10 MJ 0.01 GJ
20 MJ 0.02 GJ
50 MJ 0.05 GJ
100 MJ 0.1 GJ

Explanation

These are both units.

How to convert megajoules to gigajoules

  1. Start with the value in megajoules (MJ).
  2. Multiply it by 0.001.
  3. The result is the measurement in gigajoules (GJ).

Example: 5500.000000000001 MJ → 5.5 GJ

Frequently Asked Questions

How much is 5500 megajoules in gigajoules?

5500 megajoules equals 5.5 gigajoules.

How many gigajoules is 1 megajoule?

1 megajoule equals 0.001 gigajoules.

How many megajoules is 1 gigajoule?

1 gigajoule equals 1000 megajoules.

What is the difference between megajoules and gigajoules?

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 gigajoules 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 0.001 gigajoules?

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