How many tonelada [Portugal] in 1 gigatonne?
The answer is 1260795561.9996.
We assume you are converting between tonelada [Portugal] and gigatonne.
You can view more details on each measurement unit: tonelada [Portugal] or
gigatonne
The SI base unit for mass is the kilogram.
1 kilogram is equal to 0.0012607955619996 tonelada [Portugal], 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 tonelada [Portugal] 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).

››Metric conversions and more

ConvertUnits.com provides an online
conversion calculator for all types of measurement units.
You can find metric conversion tables for SI units, as well
as English units, currency, and other data. Type in unit
symbols, abbreviations, or full names for units of length,
area, mass, pressure, and other types. Examples include mm,
inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm,
metres squared, grams, moles, feet per second, and many more!