How many mmH2O in 1 decibar?
The answer is 1019.7162129779.

We assume you are converting between **millimeter of water [4 °C]** and **decibar**.

You can view more details on each measurement unit:

mmH2O or
decibar

The SI derived unit for **pressure** is the pascal.

1 pascal is equal to 0.10197162129779 mmH2O, or 0.0001 decibar.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between millimeters of water and decibars.

Type in your own numbers in the form to convert the units!

You can do the reverse unit conversion from decibar to mmH2O, or enter any two units below:

The SI prefix "deci" represents a factor of
10^{-1}, or in exponential notation, 1E-1.

So 1 decibar = 10^{-1} bars.

The definition of a bar is as follows:

The bar is a measurement unit of pressure, equal to 1,000,000 dynes per square centimetre (baryes), or 100,000 newtons per square metre (pascals). The word bar is of Greek origin, báros meaning weight. Its official symbol is "bar"; the earlier "b" is now deprecated, but still often seen especially as "mb" rather than the proper "mbar" for millibars.

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