How many gigatonne in 1 megatonne?
The answer is 0.001.
We assume you are converting between gigatonne and megatonne.
You can view more details on each measurement unit: gigatonne or
megatonne
The SI base unit for mass is the kilogram.
1 kilogram is equal to 1.0E-12 gigatonne, or 1.0E-9 megatonne.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between gigatonnes and megatonnes.
Type in your own numbers in the form to convert the units!

››Quick conversion chart of gigatonne to megatonne

1 gigatonne to megatonne = 1000 megatonne

2 gigatonne to megatonne = 2000 megatonne

3 gigatonne to megatonne = 3000 megatonne

4 gigatonne to megatonne = 4000 megatonne

5 gigatonne to megatonne = 5000 megatonne

6 gigatonne to megatonne = 6000 megatonne

7 gigatonne to megatonne = 7000 megatonne

8 gigatonne to megatonne = 8000 megatonne

9 gigatonne to megatonne = 9000 megatonne

10 gigatonne to megatonne = 10000 megatonne

››Want other units?

You can do the reverse unit conversion from
megatonne to gigatonne, or enter any two units below:

The SI prefix "giga" represents a factor of
10^{9}, or in exponential notation, 1E9.

So 1 gigatonne = 10^{9} tonnes.

The definition of a tonne is as follows:

A tonne (also called metric ton) is a non-SI unit of mass, accepted for use with SI, defined as: 1 tonne = 1000 kg (= 10^{6} g).

››Definition: Megatonne

The SI prefix "mega" represents a factor of
10^{6}, or in exponential notation, 1E6.

So 1 megatonne = 10^{6} tonnes.

The definition of a tonne is as follows:

A tonne (also called metric ton) is a non-SI unit of mass, accepted for use with SI, defined as: 1 tonne = 1000 kg (= 10^{6} g).

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