centimeter of water (4 °C) | 1 cmH2O | 2 cmH2O | 3 cmH2O | 4 cmH2O | 5 cmH2O | 6 cmH2O | 7 cmH2O | 8 cmH2O | 9 cmH2O | 10 cmH2O | 11 cmH2O | 12 cmH2O | 13 cmH2O | 14 cmH2O | 15 cmH2O | 16 cmH2O | 17 cmH2O | 18 cmH2O | 19 cmH2O | 20 cmH2O | 21 cmH2O | 22 cmH2O | 23 cmH2O | 24 cmH2O | 25 cmH2O | 26 cmH2O | 27 cmH2O | 28 cmH2O | 29 cmH2O | 30 cmH2O | 31 cmH2O | 32 cmH2O | 33 cmH2O | 34 cmH2O | 35 cmH2O | 36 cmH2O | 37 cmH2O | 38 cmH2O | 39 cmH2O | 40 cmH2O | 41 cmH2O | 42 cmH2O | 43 cmH2O | 44 cmH2O | 45 cmH2O | 46 cmH2O | 47 cmH2O | 48 cmH2O | 49 cmH2O | 50 cmH2O | 51 cmH2O | 52 cmH2O | 53 cmH2O | 54 cmH2O | 55 cmH2O | 56 cmH2O | 57 cmH2O | 58 cmH2O | 59 cmH2O | 60 cmH2O | 61 cmH2O | 62 cmH2O | 63 cmH2O | 64 cmH2O | 65 cmH2O | 66 cmH2O | 67 cmH2O | 68 cmH2O | 69 cmH2O | 70 cmH2O | 71 cmH2O | 72 cmH2O | 73 cmH2O | 74 cmH2O | 75 cmH2O | 76 cmH2O | 77 cmH2O | 78 cmH2O | 79 cmH2O | 80 cmH2O | 81 cmH2O | 82 cmH2O | 83 cmH2O | 84 cmH2O | 85 cmH2O | 86 cmH2O | 87 cmH2O | 88 cmH2O | 89 cmH2O | 90 cmH2O | 91 cmH2O | 92 cmH2O | 93 cmH2O | 94 cmH2O | 95 cmH2O | 96 cmH2O | 97 cmH2O | 98 cmH2O | 99 cmH2O | 100 cmH2O |
inch of water (39.2 °F) | 0.3937009 inH2O | 0.7874017 inH2O | 1.1811026 inH2O | 1.5748035 inH2O | 1.9685043 inH2O | 2.3622052 inH2O | 2.7559061 inH2O | 3.1496070 inH2O | 3.5433078 inH2O | 3.9370087 inH2O | 4.3307096 inH2O | 4.7244104 inH2O | 5.1181113 inH2O | 5.5118122 inH2O | 5.9055130 inH2O | 6.2992139 inH2O | 6.6929148 inH2O | 7.0866157 inH2O | 7.4803165 inH2O | 7.8740174 inH2O | 8.2677183 inH2O | 8.6614191 inH2O | 9.0551200 inH2O | 9.4488209 inH2O | 9.8425217 inH2O | 10.2362226 inH2O | 10.6299235 inH2O | 11.0236243 inH2O | 11.4173252 inH2O | 11.8110261 inH2O | 12.2047270 inH2O | 12.5984278 inH2O | 12.9921287 inH2O | 13.3858296 inH2O | 13.7795304 inH2O | 14.1732313 inH2O | 14.5669322 inH2O | 14.9606330 inH2O | 15.3543339 inH2O | 15.7480348 inH2O | 16.1417357 inH2O | 16.5354365 inH2O | 16.9291374 inH2O | 17.3228383 inH2O | 17.7165391 inH2O | 18.1102400 inH2O | 18.5039409 inH2O | 18.8976417 inH2O | 19.2913426 inH2O | 19.6850435 inH2O | 20.0787443 inH2O | 20.4724452 inH2O | 20.8661461 inH2O | 21.2598470 inH2O | 21.6535478 inH2O | 22.0472487 inH2O | 22.4409496 inH2O | 22.8346504 inH2O | 23.2283513 inH2O | 23.6220522 inH2O | 24.0157530 inH2O | 24.4094539 inH2O | 24.8031548 inH2O | 25.1968557 inH2O | 25.5905565 inH2O | 25.9842574 inH2O | 26.3779583 inH2O | 26.7716591 inH2O | 27.1653600 inH2O | 27.5590609 inH2O | 27.9527617 inH2O | 28.3464626 inH2O | 28.7401635 inH2O | 29.1338643 inH2O | 29.5275652 inH2O | 29.9212661 inH2O | 30.3149670 inH2O | 30.7086678 inH2O | 31.1023687 inH2O | 31.4960696 inH2O | 31.8897704 inH2O | 32.2834713 inH2O | 32.6771722 inH2O | 33.0708730 inH2O | 33.4645739 inH2O | 33.8582748 inH2O | 34.2519757 inH2O | 34.6456765 inH2O | 35.0393774 inH2O | 35.4330783 inH2O | 35.8267791 inH2O | 36.2204800 inH2O | 36.6141809 inH2O | 37.0078817 inH2O | 37.4015826 inH2O | 37.7952835 inH2O | 38.1889844 inH2O | 38.5826852 inH2O | 38.9763861 inH2O | 39.3700870 inH2O |
A centimetre of water (US spelling centimeter of water, abbreviated cm H2O or cm H2O) is a less commonly used unit of pressure derived from pressure head calculations using metrology.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
centimeter of water (4 °C) | cmH2O | ≈ 999.972 kg/m3 × 1 cm × ɡ0 | ≈ 98.0638 Pa | Metric system SI |
centimeter of water (4 °C) | inches of water (39.2 °F) | centimeter of water (4 °C) | inches of water (39.2 °F) |
---|---|---|---|
1 | ≈ 0.39370086959315 | 6 | ≈ 2.3622052175589 |
2 | ≈ 0.78740173918629 | 7 | ≈ 2.755906087152 |
3 | ≈ 1.1811026087794 | 8 | ≈ 3.1496069567452 |
4 | ≈ 1.5748034783726 | 9 | ≈ 3.5433078263383 |
5 | ≈ 1.9685043479657 | 10 | ≈ 3.9370086959315 |
inch of water (39.2 °F) is a unit of measurement for pressure.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
inch of water (39.2 °F) | inH2O | ≈ 999.972 kg/m3 × 1 in × ɡ0 | ≈ 249.082 Pa | Imperial/US |
inches of water (39.2 °F) | centimeter of water (4 °C) | inches of water (39.2 °F) | centimeter of water (4 °C) |
---|---|---|---|
1 | ≈ 2.539999469733 | 6 | ≈ 15.239996818398 |
2 | ≈ 5.0799989394659 | 7 | ≈ 17.779996288131 |
3 | ≈ 7.6199984091989 | 8 | ≈ 20.319995757864 |
4 | ≈ 10.159997878932 | 9 | ≈ 22.859995227597 |
5 | ≈ 12.699997348665 | 10 | ≈ 25.39999469733 |
centimeter of water (4 °C) | inches of water (39.2 °F) |
---|---|
1 | ≈ 0.3937009 |
2.5399995 | ≈ 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |