How many atomic mass unit [1973] in 1 gigatonne?
The answer is 6.0220448997646E+38.
We assume you are converting between atomic mass unit [1973] and gigatonne.
You can view more details on each measurement unit:
atomic mass unit [1973] or
gigatonne
The SI base unit for mass is the kilogram.
1 kilogram is equal to 6.0220448997646E+26 atomic mass unit [1973], or 1.0E-12 gigatonne.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between atomic mass units and gigatonnes.
Type in your own numbers in the form to convert the units!

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).

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