The tables below can be used to convert between some common pressure units:
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Pa (N/m2) | bar | atmosphere | mm Hg | mm H2O | m H2O | kg/cm2 | |
Pa (N/m2) | 1 | 10-5 | 9.87 10-6 | 0.0075 | 0.1 | 10-4 | 1.02 10-5 |
bar | 105 | 1 | 0.987 | 750 | 1.0197 104 | 10.197 | 1.0197 |
atmosphere | 1.01 105 | 1.013 | 1 | 759.9 | 10332 | 10.332 | 1.03 |
mm Hg | 133.3 | 1.33 10-3 | 1.32 10-3 | 1 | 13.3 | 0.013 | 1.36 10-3 |
mm H2O | 10 | 0.000097 | 9.87 10-5 | 0.075 | 1 | 0.001 | 1.02 10-4 |
m H2O | 104 | 0.097 | 9.87 10-2 | 75 | 1000 | 1 | 0.102 |
kg/cm2 | 9.8 104 | 0.98 | 0.97 | 735 | 10000 | 10 | 1 |
pound square feet | 47.8 | 4.78 10-4 | 4.72 10-4 | 0.36 | 4.78 | 4.78 10-3 | 4.88 10-4 |
pound square inches (psi) | 6894.76 | 0.069 | 0.068 | 51.7 | 689.7 | 0.690 | 0.07 |
inches Hg | 3377 | 0.0338 | 0.033 | 25.4 | 337.7 | 0.337 | 0.034 |
inches H2O | 248.8 | 2.49 10-3 | 2.46 10-3 | 1.87 | 25.4 | 0.0254 | 0.0025 |
For full table - rotate the screen!
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pound square feet | pound square inches (psi) | inches Hg | inches H2O | |
Pa (N/m2) | 0.021 | 1.450326 10-4 | 2.96 10-4 | 4.02 10-3 |
bar | 2090 | 14.50 | 29.61 | 402 |
atmosphere | 2117.5 | 14.69 | 29.92 | 407 |
mm Hg | 2.79 | 0.019 | 0.039 | 0.54 |
mm H2O | 0.209 | 1.45 10-3 | 2.96 10-3 | 0.04 |
m H2O | 209 | 1.45 | 2.96 | 40.2 |
kg/cm2 | 2049 | 14.21 | 29.03 | 394 |
pound square feet (psf) | 1 | 0.0069 | 0.014 | 0.19 |
pound square inches (psi) | 144 | 1 | 2.04 | 27.7 |
inches Hg | 70.8 | 0.49 | 1 | 13.57 |
inches H2O | 5.2 | 0.036 | 0.074 | 1 |
Note! - pressure is "force per unit area" and commonly used pressure units like kg/cm2 and similar are in principle not correct since kg is a mass unit. Mass must be multiplied with gravity g to be a force (weight).
From the table above - to convert from psi, multiply psi with 6894.76:
10 (psi) = 6894.76 10 (Pa) = 68947.6 Pa = 68.95 kPa
1 Pa (N/m2) = 0.0000102 Atmosphere (metric)
1 Pa (N/m2) = 0.0000099 Atmosphere (standard)
1 Pa (N/m2) = 0.00001 Bar
1 Pa (N/m2) = 10 Barad
1 Pa (N/m2) = 10 Barye
1 Pa (N/m2) = 0.0007501 Centimeter of mercury (0 C)
1 Pa (N/m2) = 0.0101974 Centimeter of water (4 C)
1 Pa (N/m2) = 10 Dyne/square centimeter
1 Pa (N/m2) = 0.0003346 Foot of water (4 C)
1 Pa (N/m2) = 10-9 Gigapascal
1 Pa (N/m2) = 0.01 Hectopascal
1 Pa (N/m2) = 0.0002953 Inch of mercury (0 C)
1 Pa (N/m2) = 0.0002961 Inch of mercury (15.56 C)
1 Pa (N/m2) = 0.0040186 Inch of water (15.56 C)
1 Pa (N/m2) = 0.0040147 Inch of water (4 C)
1 Pa (N/m2) = 0.0000102 Kilogram force/centimetre2
1 Pa (N/m2) = 0.0010197 Kilogram force/decimetre2
1 Pa (N/m2) = 0.101972 Kilogram force/meter2
1 Pa (N/m2) = 10-7 Kilogram force/millimeter2
1 Pa (N/m2) = 10-3 Kilopascal
1 Pa (N/m2) = 10-7 Kilopound force/square inch
1 Pa (N/m2) = 10-6 Megapascal
1 Pa (N/m2) = 0.000102 Meter of water (4 C)
1 Pa (N/m2) = 10 Microbar (barye, barrie)
1 Pa (N/m2) = 7.50062 Micron of mercury (millitorr)
1 Pa (N/m2) = 0.01 Millibar
1 Pa (N/m2) = 0.0075006 Millimeter of mercury (0 C)
1 Pa (N/m2) = 0.10207 Millimeter of water (15.56 C)
1 Pa (N/m2) = 0.10197 Millimeter of water (4 C)
1 Pa (N/m2) =7.5006 Millitorr
1 Pa (N/m2) = 1 Newton/square meter
1 Pa (N/m2) = 32.1507 Ounce force (avdp)/square inch
1 Pa (N/m2) = 0.0208854 Pound force/square foot
1 Pa (N/m2) = 0.000145 Pound force/square inch
1 Pa (N/m2) = 0.671969 Poundal/square foot
1 Pa (N/m2) = 0.0046665 Poundal/square inch
1 Pa (N/m2) = 0.0000099 Standard atmosphere
1 Pa (N/m2) = 0.0000093 Ton (long)/foot2
1 Pa (N/m2) = 10-7 Ton (long)/inch2
1 Pa (N/m2) = 0.0000104 Ton (short)/foot2
1 Pa (N/m2) = 0.64 10-7 Ton/inch2
1 Pa (N/m2) = 0.0075006 Torr
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