torr | 1 torr | 2 torr | 3 torr | 4 torr | 5 torr | 6 torr | 7 torr | 8 torr | 9 torr | 10 torr | 11 torr | 12 torr | 13 torr | 14 torr | 15 torr | 16 torr | 17 torr | 18 torr | 19 torr | 20 torr | 21 torr | 22 torr | 23 torr | 24 torr | 25 torr | 26 torr | 27 torr | 28 torr | 29 torr | 30 torr | 31 torr | 32 torr | 33 torr | 34 torr | 35 torr | 36 torr | 37 torr | 38 torr | 39 torr | 40 torr | 41 torr | 42 torr | 43 torr | 44 torr | 45 torr | 46 torr | 47 torr | 48 torr | 49 torr | 50 torr | 51 torr | 52 torr | 53 torr | 54 torr | 55 torr | 56 torr | 57 torr | 58 torr | 59 torr | 60 torr | 61 torr | 62 torr | 63 torr | 64 torr | 65 torr | 66 torr | 67 torr | 68 torr | 69 torr | 70 torr | 71 torr | 72 torr | 73 torr | 74 torr | 75 torr | 76 torr | 77 torr | 78 torr | 79 torr | 80 torr | 81 torr | 82 torr | 83 torr | 84 torr | 85 torr | 86 torr | 87 torr | 88 torr | 89 torr | 90 torr | 91 torr | 92 torr | 93 torr | 94 torr | 95 torr | 96 torr | 97 torr | 98 torr | 99 torr | 100 torr |
centimeter of water (4 °C) | 1.3595472 cmH2O | 2.7190945 cmH2O | 4.0786417 cmH2O | 5.4381890 cmH2O | 6.7977362 cmH2O | 8.1572834 cmH2O | 9.5168307 cmH2O | 10.8763779 cmH2O | 12.2359251 cmH2O | 13.5954724 cmH2O | 14.9550196 cmH2O | 16.3145669 cmH2O | 17.6741141 cmH2O | 19.0336613 cmH2O | 20.3932086 cmH2O | 21.7527558 cmH2O | 23.1123030 cmH2O | 24.4718503 cmH2O | 25.8313975 cmH2O | 27.1909448 cmH2O | 28.5504920 cmH2O | 29.9100392 cmH2O | 31.2695865 cmH2O | 32.6291337 cmH2O | 33.9886809 cmH2O | 35.3482282 cmH2O | 36.7077754 cmH2O | 38.0673227 cmH2O | 39.4268699 cmH2O | 40.7864171 cmH2O | 42.1459644 cmH2O | 43.5055116 cmH2O | 44.8650588 cmH2O | 46.2246061 cmH2O | 47.5841533 cmH2O | 48.9437006 cmH2O | 50.3032478 cmH2O | 51.6627950 cmH2O | 53.0223423 cmH2O | 54.3818895 cmH2O | 55.7414368 cmH2O | 57.1009840 cmH2O | 58.4605312 cmH2O | 59.8200785 cmH2O | 61.1796257 cmH2O | 62.5391729 cmH2O | 63.8987202 cmH2O | 65.2582674 cmH2O | 66.6178147 cmH2O | 67.9773619 cmH2O | 69.3369091 cmH2O | 70.6964564 cmH2O | 72.0560036 cmH2O | 73.4155508 cmH2O | 74.7750981 cmH2O | 76.1346453 cmH2O | 77.4941926 cmH2O | 78.8537398 cmH2O | 80.2132870 cmH2O | 81.5728343 cmH2O | 82.9323815 cmH2O | 84.2919287 cmH2O | 85.6514760 cmH2O | 87.0110232 cmH2O | 88.3705705 cmH2O | 89.7301177 cmH2O | 91.0896649 cmH2O | 92.4492122 cmH2O | 93.8087594 cmH2O | 95.1683066 cmH2O | 96.5278539 cmH2O | 97.8874011 cmH2O | 99.2469484 cmH2O | 100.6064956 cmH2O | 101.9660428 cmH2O | 103.3255901 cmH2O | 104.6851373 cmH2O | 106.0446846 cmH2O | 107.4042318 cmH2O | 108.7637790 cmH2O | 110.1233263 cmH2O | 111.4828735 cmH2O | 112.8424207 cmH2O | 114.2019680 cmH2O | 115.5615152 cmH2O | 116.9210625 cmH2O | 118.2806097 cmH2O | 119.6401569 cmH2O | 120.9997042 cmH2O | 122.3592514 cmH2O | 123.7187986 cmH2O | 125.0783459 cmH2O | 126.4378931 cmH2O | 127.7974404 cmH2O | 129.1569876 cmH2O | 130.5165348 cmH2O | 131.8760821 cmH2O | 133.2356293 cmH2O | 134.5951765 cmH2O | 135.9547238 cmH2O |
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 |
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 |
torrs | centimeter of water (4 °C) |
---|---|
1 | ≈ 1.3595472 |
0.7355390 | ≈ 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 …) |