Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
10 MJ to GJ 25 MJ to GJ 100 MJ to GJ 176 MJ to GJ 250 MJ to GJ 320 MJ to GJ 384 MJ to GJ 500 MJ to GJ 640 MJ to GJ 2,500 MJ to GJ 3,200 MJ to GJ 10,000 MJ to GJ
Reverse Conversions
5 GJ to MJ 25 GJ to MJ 100 GJ to MJ 144 GJ to MJ 192 GJ to MJ 250 GJ to MJ 384 GJ to MJ 640 GJ to MJ 1,600 GJ to MJ 10,000 GJ to MJ 25,000 GJ to MJ 50,000 GJ 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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Common Benchmarks

Microwave 10 minutes 0.17 kWh
100 W bulb for 1 hour 0.1 kWh
Boil 1 liter water 334 kJ
AA battery 10 kJ
Phone battery 40 kJ
Match stick 1 kJ

Formula

GJ = MJ × 0.001

Example

Example: convert 160 megajoules to gigajoules.

160 MJ = 0.16 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: 160 MJ → 0.16 GJ

Frequently Asked Questions

How much is 160 megajoules in gigajoules?

160 megajoules equals 0.16 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.