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Convert hectopascal to inch of water

Here you can quickly calculate how many inch of water fit in one hectopascal.
  • 1 hPa = 0.401463 inH₂O
  • 1 inH₂O = 2.490889 hPa

Hectopascal to inch of water conversion table

hectopascal inch of water
1 0.401463
2 0.802926
5 2.007315
10 4.014631
20 8.029262
50 20.073154
100 40.146308

Formula to convert hectopascal to inch of water

To convert hectopascal to inch of water, multiply by 0.401463.

1 hPa = 0.401463 inH₂O
Example: 1 hectopascal = 0.401463 inch of water

Common mistakes in pressure conversion

  • Blood pressure uses mmHg (120/80) and weather reports use hPa (around 1,013), different units that must not be mixed: 760 mmHg = 1,013.25 hPa. One mmHg is about 1.33 hPa.
  • Hectopascals and millibars are exactly the same size: 1 hPa = 1 mbar. A chart showing 1,013 mbar and one showing 1,013 hPa agree perfectly, no conversion needed. Meteorology simply renamed the unit.

Quick hectopascal to/from inch of water conversion quiz

Score: 0

23.3 inch of water equals 63.8 hectopascal.

Correct answer: 23.3 inch of water = 58 hectopascal.

7.9 hectopascal equals 3.17 inch of water.

Correct answer: 7.9 hectopascal = 3.17 inch of water.

17.2 hectopascal equals 6.21 inch of water.

Correct answer: 17.2 hectopascal = 6.91 inch of water.

23.7 hectopascal equals 9.51 inch of water.

Correct answer: 23.7 hectopascal = 9.51 inch of water.

105 hectopascal equals 46.4 inch of water.

Correct answer: 105 hectopascal = 42.2 inch of water.

More conversions in pressure