How many mmH2O in 1 inch of water? The answer is 25.399999830047. We assume you are converting between millimeter of water [4 °C] and inch of water [4 °C]. You can view more details on each measurement unit: mmH2O or inch of water The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.10197162129779 mmH2O, or 0.0040146307866177 inch of water. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between millimeters of water and inches of water. Type in your own numbers in the form to convert the units!
1 mmH2O to inch of water = 0.03937 inch of water
10 mmH2O to inch of water = 0.3937 inch of water
20 mmH2O to inch of water = 0.7874 inch of water
30 mmH2O to inch of water = 1.1811 inch of water
40 mmH2O to inch of water = 1.5748 inch of water
50 mmH2O to inch of water = 1.9685 inch of water
100 mmH2O to inch of water = 3.93701 inch of water
200 mmH2O to inch of water = 7.87402 inch of water
You can do the reverse unit conversion from inch of water to mmH2O, or enter any two units below:
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