How many mm H2O in 1 gigapascal?
The answer is 101971621.29779.
We assume you are converting between millimeter water [4 °C] and gigapascal.
You can view more details on each measurement unit: mm H2O or
gigapascal
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.10197162129779 mm H2O, or 1.0E-9 gigapascal.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between millimeters water and gigapascals.
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The SI prefix "giga" represents a factor of
10^{9}, or in exponential notation, 1E9.

So 1 gigapascal = 10^{9} pascals.

The definition of a pascal is as follows:

The pascal (symbol Pa) is the SI unit of pressure.It is equivalent to one newton per square metre. The unit is named after Blaise Pascal, the eminent French mathematician, physicist and philosopher.

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