Air pressure Calculator

Enter the value that you want to calculate air pressure..

Fill in the value of the known unit and click on ‘Calculate’ to calculate the four unknown air pressure units.
Pascal (hPa)
Bar (mBar)
Inches of Mercury (inHg)
Torr (mmHg)
Atmosphere (atm)

Relationship Between Altitude and Pressure

Altitude above Sea LevelAbsolute Atmospheric Pressure
feetmilesmeterskPaatmpsia
-5000-0.95-1524121.01.1917.55
-4000-0.76-1219116.91.1516.95
-3000-0.57-914112.81.1116.36
-2000-0.38-610108.91.0715.79
-1000-0.19-305105.01.0415.24
-500-0.09-152103.21.0214.96
00.000101.31.0014.70
5000.0915299.50.9814.43
10000.1930597.70.9614.17
15000.2845796.00.9513.92
20000.3861094.20.9313.66
25000.4776292.50.9113.42
30000.5791490.80.9013.17
35000.66106789.10.8812.93
40000.76121987.50.8612.69
45000.85137285.90.8512.46
50000.95152484.30.8312.23
60001.14182981.20.8011.78
70001.33213478.20.7711.34
80001.52243875.30.7410.92
90001.70274372.40.7110.51
100001.89304869.70.6910.11
150002.84457257.20.568.29
200003.79609646.60.466.75
250004.73762037.60.375.45
300005.68914430.10.304.36
350006.631066823.80.243.46
400007.581219218.80.192.72
450008.521371614.70.152.14
500009.471524011.60.111.68
5500010.42167649.10.091.32
6000011.36182887.20.071.04
6500012.31198125.60.060.82