## ››Convert decibar to millimeter water [4 °C]

 decibar mm H2O

How many decibar in 1 mm H2O? The answer is 0.000980665.
We assume you are converting between decibar and millimeter water [4 °C].
You can view more details on each measurement unit:
decibar or mm H2O
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.0001 decibar, or 0.10197162129779 mm H2O.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between decibars and millimeters water.
Type in your own numbers in the form to convert the units!

## ››Quick conversion chart of decibar to mm H2O

1 decibar to mm H2O = 1019.71621 mm H2O

2 decibar to mm H2O = 2039.43243 mm H2O

3 decibar to mm H2O = 3059.14864 mm H2O

4 decibar to mm H2O = 4078.86485 mm H2O

5 decibar to mm H2O = 5098.58106 mm H2O

6 decibar to mm H2O = 6118.29728 mm H2O

7 decibar to mm H2O = 7138.01349 mm H2O

8 decibar to mm H2O = 8157.7297 mm H2O

9 decibar to mm H2O = 9177.44592 mm H2O

10 decibar to mm H2O = 10197.16213 mm H2O

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## ››Definition: Decibar

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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