Inch of mercury | 1 inHg | 2 inHg | 3 inHg | 4 inHg | 5 inHg | 6 inHg | 7 inHg | 8 inHg | 9 inHg | 10 inHg | 11 inHg | 12 inHg | 13 inHg | 14 inHg | 15 inHg | 16 inHg | 17 inHg | 18 inHg | 19 inHg | 20 inHg | 21 inHg | 22 inHg | 23 inHg | 24 inHg | 25 inHg | 26 inHg | 27 inHg | 28 inHg | 29 inHg | 30 inHg | 31 inHg | 32 inHg | 33 inHg | 34 inHg | 35 inHg | 36 inHg | 37 inHg | 38 inHg | 39 inHg | 40 inHg | 41 inHg | 42 inHg | 43 inHg | 44 inHg | 45 inHg | 46 inHg | 47 inHg | 48 inHg | 49 inHg | 50 inHg | 51 inHg | 52 inHg | 53 inHg | 54 inHg | 55 inHg | 56 inHg | 57 inHg | 58 inHg | 59 inHg | 60 inHg | 61 inHg | 62 inHg | 63 inHg | 64 inHg | 65 inHg | 66 inHg | 67 inHg | 68 inHg | 69 inHg | 70 inHg | 71 inHg | 72 inHg | 73 inHg | 74 inHg | 75 inHg | 76 inHg | 77 inHg | 78 inHg | 79 inHg | 80 inHg | 81 inHg | 82 inHg | 83 inHg | 84 inHg | 85 inHg | 86 inHg | 87 inHg | 88 inHg | 89 inHg | 90 inHg | 91 inHg | 92 inHg | 93 inHg | 94 inHg | 95 inHg | 96 inHg | 97 inHg | 98 inHg | 99 inHg | 100 inHg |
centimeter of water (4 °C) | 34.5325084 cmH2O | 69.0650169 cmH2O | 103.5975253 cmH2O | 138.1300337 cmH2O | 172.6625421 cmH2O | 207.1950506 cmH2O | 241.7275590 cmH2O | 276.2600674 cmH2O | 310.7925759 cmH2O | 345.3250843 cmH2O | 379.8575927 cmH2O | 414.3901011 cmH2O | 448.9226096 cmH2O | 483.4551180 cmH2O | 517.9876264 cmH2O | 552.5201349 cmH2O | 587.0526433 cmH2O | 621.5851517 cmH2O | 656.1176601 cmH2O | 690.6501686 cmH2O | 725.1826770 cmH2O | 759.7151854 cmH2O | 794.2476938 cmH2O | 828.7802023 cmH2O | 863.3127107 cmH2O | 897.8452191 cmH2O | 932.3777276 cmH2O | 966.9102360 cmH2O | 1,001.4427444 cmH2O | 1,035.9752528 cmH2O | 1,070.5077613 cmH2O | 1,105.0402697 cmH2O | 1,139.5727781 cmH2O | 1,174.1052866 cmH2O | 1,208.6377950 cmH2O | 1,243.1703034 cmH2O | 1,277.7028118 cmH2O | 1,312.2353203 cmH2O | 1,346.7678287 cmH2O | 1,381.3003371 cmH2O | 1,415.8328456 cmH2O | 1,450.3653540 cmH2O | 1,484.8978624 cmH2O | 1,519.4303708 cmH2O | 1,553.9628793 cmH2O | 1,588.4953877 cmH2O | 1,623.0278961 cmH2O | 1,657.5604046 cmH2O | 1,692.0929130 cmH2O | 1,726.6254214 cmH2O | 1,761.1579298 cmH2O | 1,795.6904383 cmH2O | 1,830.2229467 cmH2O | 1,864.7554551 cmH2O | 1,899.2879636 cmH2O | 1,933.8204720 cmH2O | 1,968.3529804 cmH2O | 2,002.8854888 cmH2O | 2,037.4179973 cmH2O | 2,071.9505057 cmH2O | 2,106.4830141 cmH2O | 2,141.0155225 cmH2O | 2,175.5480310 cmH2O | 2,210.0805394 cmH2O | 2,244.6130478 cmH2O | 2,279.1455563 cmH2O | 2,313.6780647 cmH2O | 2,348.2105731 cmH2O | 2,382.7430815 cmH2O | 2,417.2755900 cmH2O | 2,451.8080984 cmH2O | 2,486.3406068 cmH2O | 2,520.8731153 cmH2O | 2,555.4056237 cmH2O | 2,589.9381321 cmH2O | 2,624.4706405 cmH2O | 2,659.0031490 cmH2O | 2,693.5356574 cmH2O | 2,728.0681658 cmH2O | 2,762.6006743 cmH2O | 2,797.1331827 cmH2O | 2,831.6656911 cmH2O | 2,866.1981995 cmH2O | 2,900.7307080 cmH2O | 2,935.2632164 cmH2O | 2,969.7957248 cmH2O | 3,004.3282333 cmH2O | 3,038.8607417 cmH2O | 3,073.3932501 cmH2O | 3,107.9257585 cmH2O | 3,142.4582670 cmH2O | 3,176.9907754 cmH2O | 3,211.5232838 cmH2O | 3,246.0557922 cmH2O | 3,280.5883007 cmH2O | 3,315.1208091 cmH2O | 3,349.6533175 cmH2O | 3,384.1858260 cmH2O | 3,418.7183344 cmH2O | 3,453.2508428 cmH2O |
Inch of mercury (inHg and "Hg) is a unit of measurement for pressure. It is still used for barometric pressure in weather reports, refrigeration and aviation in the United States.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
Inch of mercury | inHg | ≡ 13595.1 kg/m3 × 1 in × ɡ0 | ≈ 3.386389×103 Pa | Imperial/US |
Inches of mercury | centimeter of water (4 °C) | Inches of mercury | centimeter of water (4 °C) |
---|---|---|---|
1 | ≈ 34.532508428187 | 6 | ≈ 207.19505056912 |
2 | ≈ 69.065016856373 | 7 | ≈ 241.72755899731 |
3 | ≈ 103.59752528456 | 8 | ≈ 276.26006742549 |
4 | ≈ 138.13003371275 | 9 | ≈ 310.79257585368 |
5 | ≈ 172.66254214093 | 10 | ≈ 345.32508428187 |
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) | Inches of mercury | centimeter of water (4 °C) | Inches of mercury |
---|---|---|---|
1 | ≈ 0.028958220688763 | 6 | ≈ 0.17374932413258 |
2 | ≈ 0.057916441377526 | 7 | ≈ 0.20270754482134 |
3 | ≈ 0.086874662066289 | 8 | ≈ 0.23166576551011 |
4 | ≈ 0.11583288275505 | 9 | ≈ 0.26062398619887 |
5 | ≈ 0.14479110344382 | 10 | ≈ 0.28958220688763 |
Inches of mercury | centimeter of water (4 °C) |
---|---|
1 | ≈ 34.5325084 |
0.0289582 | ≈ 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 …) |