Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
1 GJ to MJ 5 GJ to MJ 6 GJ to MJ 25 GJ to MJ 30 GJ to MJ 50 GJ to MJ 100 GJ to MJ 250 GJ to MJ 2,500 GJ to MJ 10,000 GJ to MJ 25,000 GJ to MJ 100,000 GJ to MJ
Reverse Conversions
1 MJ to GJ 2 MJ to GJ 3.5 MJ to GJ 5 MJ to GJ 15 MJ to GJ 30 MJ to GJ 500 MJ to GJ 2,500 MJ to GJ 5,000 MJ to GJ 25,000 MJ to GJ 50,000 MJ to GJ 100,000 MJ to GJ
More Energy Conversions
2 GJ to MJ 1 MJ to BTU 100 J to cal 1 GJ to kWh 10,000 J to kJ 2 MJ to BTU 100 kJ to kcal 1 MJ to kWh 1,000,000 J to MJ

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Common Benchmarks

Food calorie 4184 J
Cup of coffee 5 kJ
Phone battery 40 kJ
Slice of bread 330 kJ
Gasoline liter 34 MJ
Microwave 10 minutes 0.17 kWh

Formula

MJ = GJ × 1000

Example

Example: convert 1.5 gigajoules to megajoules.

1.5 GJ = 1500 MJ

Conversion table

gigajoules (GJ) megajoules (MJ)
1 GJ 1000 MJ
2 GJ 2000 MJ
5 GJ 5000 MJ
10 GJ 10000 MJ
20 GJ 20000 MJ
50 GJ 50000 MJ
100 GJ 100000 MJ

Explanation

These are both units.

How to convert gigajoules to megajoules

  1. Start with the value in gigajoules (GJ).
  2. Multiply it by 1000.
  3. The result is the measurement in megajoules (MJ).

Example: 1.5 GJ → 1500 MJ

Frequently Asked Questions

How much is 1.5 gigajoules in megajoules?

1.5 gigajoules equals 1500 megajoules.

How many megajoules is 1 gigajoule?

1 gigajoule equals 1000 megajoules.

How many gigajoules is 1 megajoule?

1 megajoule equals 0.001 gigajoules.

What is the difference between gigajoules and megajoules?

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 megajoules 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 1000 megajoules?

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