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 |
torr | 0.7355390 torr | 1.4710780 torr | 2.2066170 torr | 2.9421560 torr | 3.6776949 torr | 4.4132339 torr | 5.1487729 torr | 5.8843119 torr | 6.6198509 torr | 7.3553899 torr | 8.0909289 torr | 8.8264679 torr | 9.5620068 torr | 10.2975458 torr | 11.0330848 torr | 11.7686238 torr | 12.5041628 torr | 13.2397018 torr | 13.9752408 torr | 14.7107798 torr | 15.4463188 torr | 16.1818577 torr | 16.9173967 torr | 17.6529357 torr | 18.3884747 torr | 19.1240137 torr | 19.8595527 torr | 20.5950917 torr | 21.3306307 torr | 22.0661697 torr | 22.8017086 torr | 23.5372476 torr | 24.2727866 torr | 25.0083256 torr | 25.7438646 torr | 26.4794036 torr | 27.2149426 torr | 27.9504816 torr | 28.6860205 torr | 29.4215595 torr | 30.1570985 torr | 30.8926375 torr | 31.6281765 torr | 32.3637155 torr | 33.0992545 torr | 33.8347935 torr | 34.5703325 torr | 35.3058714 torr | 36.0414104 torr | 36.7769494 torr | 37.5124884 torr | 38.2480274 torr | 38.9835664 torr | 39.7191054 torr | 40.4546444 torr | 41.1901834 torr | 41.9257223 torr | 42.6612613 torr | 43.3968003 torr | 44.1323393 torr | 44.8678783 torr | 45.6034173 torr | 46.3389563 torr | 47.0744953 torr | 47.8100342 torr | 48.5455732 torr | 49.2811122 torr | 50.0166512 torr | 50.7521902 torr | 51.4877292 torr | 52.2232682 torr | 52.9588072 torr | 53.6943462 torr | 54.4298851 torr | 55.1654241 torr | 55.9009631 torr | 56.6365021 torr | 57.3720411 torr | 58.1075801 torr | 58.8431191 torr | 59.5786581 torr | 60.3141970 torr | 61.0497360 torr | 61.7852750 torr | 62.5208140 torr | 63.2563530 torr | 63.9918920 torr | 64.7274310 torr | 65.4629700 torr | 66.1985090 torr | 66.9340479 torr | 67.6695869 torr | 68.4051259 torr | 69.1406649 torr | 69.8762039 torr | 70.6117429 torr | 71.3472819 torr | 72.0828209 torr | 72.8183599 torr | 73.5538988 torr |
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) | torrs | centimeter of water (4 °C) | torrs |
---|---|---|---|
1 | ≈ 0.73553898840365 | 6 | ≈ 4.4132339304219 |
2 | ≈ 1.4710779768073 | 7 | ≈ 5.1487729188256 |
3 | ≈ 2.206616965211 | 8 | ≈ 5.8843119072292 |
4 | ≈ 2.9421559536146 | 9 | ≈ 6.6198508956329 |
5 | ≈ 3.6776949420183 | 10 | ≈ 7.3553898840365 |
The torr (symbol: Torr) is a unit of pressure based on an absolute scale, now defined as exactly 1/760 of a standard atmosphere. Thus one torr is exactly 101325/760 pascals (~133.3 Pa).
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
torr | torr | ≡ 101325⁄760 Pa | ≈ 133.3224 Pa | Metric system SI |
torrs | centimeter of water (4 °C) | torrs | centimeter of water (4 °C) |
---|---|---|---|
1 | ≈ 1.3595472378294 | 6 | ≈ 8.1572834269763 |
2 | ≈ 2.7190944756588 | 7 | ≈ 9.5168306648057 |
3 | ≈ 4.0786417134881 | 8 | ≈ 10.876377902635 |
4 | ≈ 5.4381889513175 | 9 | ≈ 12.235925140464 |
5 | ≈ 6.7977361891469 | 10 | ≈ 13.595472378294 |
centimeter of water (4 °C) | torrs |
---|---|
1 | ≈ 0.7355390 |
1.3595472 | ≈ 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 …) |