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 |
foot of water (39.2 °F) | 0.0328084 ftH2O | 0.0656169 ftH2O | 0.0984253 ftH2O | 0.1312338 ftH2O | 0.1640422 ftH2O | 0.1968507 ftH2O | 0.2296591 ftH2O | 0.2624676 ftH2O | 0.2952760 ftH2O | 0.3280845 ftH2O | 0.3608929 ftH2O | 0.3937014 ftH2O | 0.4265098 ftH2O | 0.4593183 ftH2O | 0.4921267 ftH2O | 0.5249352 ftH2O | 0.5577436 ftH2O | 0.5905521 ftH2O | 0.6233605 ftH2O | 0.6561690 ftH2O | 0.6889774 ftH2O | 0.7217859 ftH2O | 0.7545943 ftH2O | 0.7874028 ftH2O | 0.8202112 ftH2O | 0.8530197 ftH2O | 0.8858281 ftH2O | 0.9186366 ftH2O | 0.9514450 ftH2O | 0.9842535 ftH2O | 1.0170619 ftH2O | 1.0498704 ftH2O | 1.0826788 ftH2O | 1.1154873 ftH2O | 1.1482957 ftH2O | 1.1811042 ftH2O | 1.2139126 ftH2O | 1.2467211 ftH2O | 1.2795295 ftH2O | 1.3123380 ftH2O | 1.3451464 ftH2O | 1.3779549 ftH2O | 1.4107633 ftH2O | 1.4435718 ftH2O | 1.4763802 ftH2O | 1.5091887 ftH2O | 1.5419971 ftH2O | 1.5748056 ftH2O | 1.6076140 ftH2O | 1.6404225 ftH2O | 1.6732309 ftH2O | 1.7060394 ftH2O | 1.7388478 ftH2O | 1.7716563 ftH2O | 1.8044647 ftH2O | 1.8372732 ftH2O | 1.8700816 ftH2O | 1.9028901 ftH2O | 1.9356985 ftH2O | 1.9685070 ftH2O | 2.0013154 ftH2O | 2.0341239 ftH2O | 2.0669323 ftH2O | 2.0997408 ftH2O | 2.1325492 ftH2O | 2.1653577 ftH2O | 2.1981661 ftH2O | 2.2309746 ftH2O | 2.2637830 ftH2O | 2.2965915 ftH2O | 2.3293999 ftH2O | 2.3622084 ftH2O | 2.3950168 ftH2O | 2.4278253 ftH2O | 2.4606337 ftH2O | 2.4934422 ftH2O | 2.5262506 ftH2O | 2.5590591 ftH2O | 2.5918675 ftH2O | 2.6246760 ftH2O | 2.6574844 ftH2O | 2.6902929 ftH2O | 2.7231013 ftH2O | 2.7559098 ftH2O | 2.7887182 ftH2O | 2.8215267 ftH2O | 2.8543351 ftH2O | 2.8871436 ftH2O | 2.9199520 ftH2O | 2.9527605 ftH2O | 2.9855689 ftH2O | 3.0183774 ftH2O | 3.0511858 ftH2O | 3.0839943 ftH2O | 3.1168027 ftH2O | 3.1496112 ftH2O | 3.1824196 ftH2O | 3.2152281 ftH2O | 3.2480365 ftH2O | 3.2808450 ftH2O |
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) | feet of water (39.2 °F) | centimeter of water (4 °C) | feet of water (39.2 °F) |
---|---|---|---|
1 | ≈ 0.032808449705251 | 6 | ≈ 0.1968506982315 |
2 | ≈ 0.065616899410501 | 7 | ≈ 0.22965914793675 |
3 | ≈ 0.098425349115752 | 8 | ≈ 0.262467597642 |
4 | ≈ 0.131233798821 | 9 | ≈ 0.29527604734726 |
5 | ≈ 0.16404224852625 | 10 | ≈ 0.32808449705251 |
foot of water (39.2 °F) is the unit of pressure.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
foot of water (39.2 °F) | ftH2O | ≈ 999.972 kg/m3 × 1 ft × ɡ0 | ≈ 2.98898×103 Pa | Metric system SI |
feet of water (39.2 °F) | centimeter of water (4 °C) | feet of water (39.2 °F) | centimeter of water (4 °C) |
---|---|---|---|
1 | ≈ 30.479952847024 | 6 | ≈ 182.87971708214 |
2 | ≈ 60.959905694048 | 7 | ≈ 213.35966992917 |
3 | ≈ 91.439858541072 | 8 | ≈ 243.83962277619 |
4 | ≈ 121.9198113881 | 9 | ≈ 274.31957562322 |
5 | ≈ 152.39976423512 | 10 | ≈ 304.79952847024 |
centimeter of water (4 °C) | feet of water (39.2 °F) |
---|---|
1 | ≈ 0.0328084 |
30.4799528 | ≈ 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 …) |