atmosphere | 1 atm | 2 atm | 3 atm | 4 atm | 5 atm | 6 atm | 7 atm | 8 atm | 9 atm | 10 atm | 11 atm | 12 atm | 13 atm | 14 atm | 15 atm | 16 atm | 17 atm | 18 atm | 19 atm | 20 atm | 21 atm | 22 atm | 23 atm | 24 atm | 25 atm | 26 atm | 27 atm | 28 atm | 29 atm | 30 atm | 31 atm | 32 atm | 33 atm | 34 atm | 35 atm | 36 atm | 37 atm | 38 atm | 39 atm | 40 atm | 41 atm | 42 atm | 43 atm | 44 atm | 45 atm | 46 atm | 47 atm | 48 atm | 49 atm | 50 atm | 51 atm | 52 atm | 53 atm | 54 atm | 55 atm | 56 atm | 57 atm | 58 atm | 59 atm | 60 atm | 61 atm | 62 atm | 63 atm | 64 atm | 65 atm | 66 atm | 67 atm | 68 atm | 69 atm | 70 atm | 71 atm | 72 atm | 73 atm | 74 atm | 75 atm | 76 atm | 77 atm | 78 atm | 79 atm | 80 atm | 81 atm | 82 atm | 83 atm | 84 atm | 85 atm | 86 atm | 87 atm | 88 atm | 89 atm | 90 atm | 91 atm | 92 atm | 93 atm | 94 atm | 95 atm | 96 atm | 97 atm | 98 atm | 99 atm | 100 atm |
centimeter of water (4 °C) | 1,033.2559008 cmH2O | 2,066.5118015 cmH2O | 3,099.7677023 cmH2O | 4,133.0236030 cmH2O | 5,166.2795038 cmH2O | 6,199.5354045 cmH2O | 7,232.7913053 cmH2O | 8,266.0472060 cmH2O | 9,299.3031068 cmH2O | 10,332.5590075 cmH2O | 11,365.8149083 cmH2O | 12,399.0708090 cmH2O | 13,432.3267098 cmH2O | 14,465.5826105 cmH2O | 15,498.8385113 cmH2O | 16,532.0944120 cmH2O | 17,565.3503128 cmH2O | 18,598.6062135 cmH2O | 19,631.8621143 cmH2O | 20,665.1180150 cmH2O | 21,698.3739158 cmH2O | 22,731.6298165 cmH2O | 23,764.8857173 cmH2O | 24,798.1416180 cmH2O | 25,831.3975188 cmH2O | 26,864.6534195 cmH2O | 27,897.9093203 cmH2O | 28,931.1652210 cmH2O | 29,964.4211218 cmH2O | 30,997.6770225 cmH2O | 32,030.9329233 cmH2O | 33,064.1888240 cmH2O | 34,097.4447248 cmH2O | 35,130.7006255 cmH2O | 36,163.9565263 cmH2O | 37,197.2124270 cmH2O | 38,230.4683278 cmH2O | 39,263.7242285 cmH2O | 40,296.9801293 cmH2O | 41,330.2360300 cmH2O | 42,363.4919308 cmH2O | 43,396.7478315 cmH2O | 44,430.0037323 cmH2O | 45,463.2596330 cmH2O | 46,496.5155338 cmH2O | 47,529.7714345 cmH2O | 48,563.0273353 cmH2O | 49,596.2832360 cmH2O | 50,629.5391368 cmH2O | 51,662.7950375 cmH2O | 52,696.0509383 cmH2O | 53,729.3068390 cmH2O | 54,762.5627398 cmH2O | 55,795.8186405 cmH2O | 56,829.0745413 cmH2O | 57,862.3304420 cmH2O | 58,895.5863428 cmH2O | 59,928.8422435 cmH2O | 60,962.0981443 cmH2O | 61,995.3540450 cmH2O | 63,028.6099458 cmH2O | 64,061.8658465 cmH2O | 65,095.1217473 cmH2O | 66,128.3776480 cmH2O | 67,161.6335488 cmH2O | 68,194.8894495 cmH2O | 69,228.1453503 cmH2O | 70,261.4012510 cmH2O | 71,294.6571518 cmH2O | 72,327.9130525 cmH2O | 73,361.1689533 cmH2O | 74,394.4248540 cmH2O | 75,427.6807548 cmH2O | 76,460.9366555 cmH2O | 77,494.1925563 cmH2O | 78,527.4484570 cmH2O | 79,560.7043578 cmH2O | 80,593.9602585 cmH2O | 81,627.2161593 cmH2O | 82,660.4720600 cmH2O | 83,693.7279608 cmH2O | 84,726.9838615 cmH2O | 85,760.2397623 cmH2O | 86,793.4956630 cmH2O | 87,826.7515638 cmH2O | 88,860.0074645 cmH2O | 89,893.2633653 cmH2O | 90,926.5192660 cmH2O | 91,959.7751668 cmH2O | 92,993.0310675 cmH2O | 94,026.2869683 cmH2O | 95,059.5428690 cmH2O | 96,092.7987698 cmH2O | 97,126.0546705 cmH2O | 98,159.3105713 cmH2O | 99,192.5664720 cmH2O | 100,225.8223728 cmH2O | 101,259.0782735 cmH2O | 102,292.3341743 cmH2O | 103,325.5900750 cmH2O |
The standard atmosphere (symbol: atm) is a unit of pressure defined as 101325 Pa (1.01325 bar). It is sometimes used as a reference or standard pressure.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
atmosphere | atm | ≡ 101325 Pa | Metric system SI |
atmospheres | centimeter of water (4 °C) | atmospheres | centimeter of water (4 °C) |
---|---|---|---|
1 | ≈ 1033.2559007503 | 6 | ≈ 6199.535404502 |
2 | ≈ 2066.5118015007 | 7 | ≈ 7232.7913052523 |
3 | ≈ 3099.767702251 | 8 | ≈ 8266.0472060026 |
4 | ≈ 4133.0236030013 | 9 | ≈ 9299.303106753 |
5 | ≈ 5166.2795037516 | 10 | ≈ 10332.559007503 |
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) | atmospheres | centimeter of water (4 °C) | atmospheres |
---|---|---|---|
1 | ≈ 0.00096781445842586 | 6 | ≈ 0.0058068867505551 |
2 | ≈ 0.0019356289168517 | 7 | ≈ 0.006774701208981 |
3 | ≈ 0.0029034433752776 | 8 | ≈ 0.0077425156674069 |
4 | ≈ 0.0038712578337034 | 9 | ≈ 0.0087103301258327 |
5 | ≈ 0.0048390722921293 | 10 | ≈ 0.0096781445842586 |
atmospheres | centimeter of water (4 °C) |
---|---|
1 | ≈ 1,033.2559008 |
0.0009678 | ≈ 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 …) |