pound per (square inch) | 1 lb/in2 | 2 lb/in2 | 3 lb/in2 | 4 lb/in2 | 5 lb/in2 | 6 lb/in2 | 7 lb/in2 | 8 lb/in2 | 9 lb/in2 | 10 lb/in2 | 11 lb/in2 | 12 lb/in2 | 13 lb/in2 | 14 lb/in2 | 15 lb/in2 | 16 lb/in2 | 17 lb/in2 | 18 lb/in2 | 19 lb/in2 | 20 lb/in2 | 21 lb/in2 | 22 lb/in2 | 23 lb/in2 | 24 lb/in2 | 25 lb/in2 | 26 lb/in2 | 27 lb/in2 | 28 lb/in2 | 29 lb/in2 | 30 lb/in2 | 31 lb/in2 | 32 lb/in2 | 33 lb/in2 | 34 lb/in2 | 35 lb/in2 | 36 lb/in2 | 37 lb/in2 | 38 lb/in2 | 39 lb/in2 | 40 lb/in2 | 41 lb/in2 | 42 lb/in2 | 43 lb/in2 | 44 lb/in2 | 45 lb/in2 | 46 lb/in2 | 47 lb/in2 | 48 lb/in2 | 49 lb/in2 | 50 lb/in2 | 51 lb/in2 | 52 lb/in2 | 53 lb/in2 | 54 lb/in2 | 55 lb/in2 | 56 lb/in2 | 57 lb/in2 | 58 lb/in2 | 59 lb/in2 | 60 lb/in2 | 61 lb/in2 | 62 lb/in2 | 63 lb/in2 | 64 lb/in2 | 65 lb/in2 | 66 lb/in2 | 67 lb/in2 | 68 lb/in2 | 69 lb/in2 | 70 lb/in2 | 71 lb/in2 | 72 lb/in2 | 73 lb/in2 | 74 lb/in2 | 75 lb/in2 | 76 lb/in2 | 77 lb/in2 | 78 lb/in2 | 79 lb/in2 | 80 lb/in2 | 81 lb/in2 | 82 lb/in2 | 83 lb/in2 | 84 lb/in2 | 85 lb/in2 | 86 lb/in2 | 87 lb/in2 | 88 lb/in2 | 89 lb/in2 | 90 lb/in2 | 91 lb/in2 | 92 lb/in2 | 93 lb/in2 | 94 lb/in2 | 95 lb/in2 | 96 lb/in2 | 97 lb/in2 | 98 lb/in2 | 99 lb/in2 | 100 lb/in2 |
centimeter of water (4 °C) | 70.3088937 cmH2O | 140.6177875 cmH2O | 210.9266812 cmH2O | 281.2355749 cmH2O | 351.5444687 cmH2O | 421.8533624 cmH2O | 492.1622561 cmH2O | 562.4711499 cmH2O | 632.7800436 cmH2O | 703.0889373 cmH2O | 773.3978311 cmH2O | 843.7067248 cmH2O | 914.0156185 cmH2O | 984.3245122 cmH2O | 1,054.6334060 cmH2O | 1,124.9422997 cmH2O | 1,195.2511934 cmH2O | 1,265.5600872 cmH2O | 1,335.8689809 cmH2O | 1,406.1778746 cmH2O | 1,476.4867684 cmH2O | 1,546.7956621 cmH2O | 1,617.1045558 cmH2O | 1,687.4134496 cmH2O | 1,757.7223433 cmH2O | 1,828.0312370 cmH2O | 1,898.3401308 cmH2O | 1,968.6490245 cmH2O | 2,038.9579182 cmH2O | 2,109.2668120 cmH2O | 2,179.5757057 cmH2O | 2,249.8845994 cmH2O | 2,320.1934932 cmH2O | 2,390.5023869 cmH2O | 2,460.8112806 cmH2O | 2,531.1201744 cmH2O | 2,601.4290681 cmH2O | 2,671.7379618 cmH2O | 2,742.0468556 cmH2O | 2,812.3557493 cmH2O | 2,882.6646430 cmH2O | 2,952.9735367 cmH2O | 3,023.2824305 cmH2O | 3,093.5913242 cmH2O | 3,163.9002179 cmH2O | 3,234.2091117 cmH2O | 3,304.5180054 cmH2O | 3,374.8268991 cmH2O | 3,445.1357929 cmH2O | 3,515.4446866 cmH2O | 3,585.7535803 cmH2O | 3,656.0624741 cmH2O | 3,726.3713678 cmH2O | 3,796.6802615 cmH2O | 3,866.9891553 cmH2O | 3,937.2980490 cmH2O | 4,007.6069427 cmH2O | 4,077.9158365 cmH2O | 4,148.2247302 cmH2O | 4,218.5336239 cmH2O | 4,288.8425177 cmH2O | 4,359.1514114 cmH2O | 4,429.4603051 cmH2O | 4,499.7691989 cmH2O | 4,570.0780926 cmH2O | 4,640.3869863 cmH2O | 4,710.6958801 cmH2O | 4,781.0047738 cmH2O | 4,851.3136675 cmH2O | 4,921.6225612 cmH2O | 4,991.9314550 cmH2O | 5,062.2403487 cmH2O | 5,132.5492424 cmH2O | 5,202.8581362 cmH2O | 5,273.1670299 cmH2O | 5,343.4759236 cmH2O | 5,413.7848174 cmH2O | 5,484.0937111 cmH2O | 5,554.4026048 cmH2O | 5,624.7114986 cmH2O | 5,695.0203923 cmH2O | 5,765.3292860 cmH2O | 5,835.6381798 cmH2O | 5,905.9470735 cmH2O | 5,976.2559672 cmH2O | 6,046.5648610 cmH2O | 6,116.8737547 cmH2O | 6,187.1826484 cmH2O | 6,257.4915422 cmH2O | 6,327.8004359 cmH2O | 6,398.1093296 cmH2O | 6,468.4182234 cmH2O | 6,538.7271171 cmH2O | 6,609.0360108 cmH2O | 6,679.3449046 cmH2O | 6,749.6537983 cmH2O | 6,819.9626920 cmH2O | 6,890.2715857 cmH2O | 6,960.5804795 cmH2O | 7,030.8893732 cmH2O |
The pound per square inch or, more accurately, pound-force per square inch (symbol: lbf/in2; abbreviation: psi) is a unit of pressure or of stress based on avoirdupois units.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
pound per (square inch) | lb/in2 | ≡ 1 pound × ɡ0 / 1 sq in | = 6 894.75729 pascals | Imperial/US |
pound per (square inch) | centimeter of water (4 °C) | pound per (square inch) | centimeter of water (4 °C) |
---|---|---|---|
1 | ≈ 70.308893732125 | 6 | ≈ 421.85336239275 |
2 | ≈ 140.61778746425 | 7 | ≈ 492.16225612488 |
3 | ≈ 210.92668119638 | 8 | ≈ 562.471149857 |
4 | ≈ 281.2355749285 | 9 | ≈ 632.78004358913 |
5 | ≈ 351.54446866063 | 10 | ≈ 703.08893732125 |
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) | pound per (square inch) | centimeter of water (4 °C) | pound per (square inch) |
---|---|---|---|
1 | ≈ 0.014222951705228 | 6 | ≈ 0.085337710231366 |
2 | ≈ 0.028445903410455 | 7 | ≈ 0.099560661936594 |
3 | ≈ 0.042668855115683 | 8 | ≈ 0.11378361364182 |
4 | ≈ 0.056891806820911 | 9 | ≈ 0.12800656534705 |
5 | ≈ 0.071114758526138 | 10 | ≈ 0.14222951705228 |
pound per (square inch) | centimeter of water (4 °C) |
---|---|
1 | ≈ 70.3088937 |
0.0142230 | ≈ 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 …) |