## ››Convert zeptogram to gigatonne

 zeptogram gigaton

How many zeptogram in 1 gigaton? The answer is 1.0E+36.
We assume you are converting between zeptogram and gigatonne.
You can view more details on each measurement unit:
zeptogram or gigaton
The SI base unit for mass is the kilogram.
1 kilogram is equal to 1.0E+24 zeptogram, or 1.0E-12 gigaton.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between zeptograms and gigatonnes.
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## ››Definition: Zeptogram

The SI prefix "zepto" represents a factor of 10-21, or in exponential notation, 1E-21.

So 1 zeptogram = 10-21 grams-force.

## ››Definition: Gigatonne

The SI prefix "giga" represents a factor of 109, or in exponential notation, 1E9.

So 1 gigatonne = 109 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 (= 106 g).

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