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Pressure Units - Online Converter

Convert between pressure units like Pa,  bar, atmosphere, pound square feet, psi and more.

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Pressure Converter

The calculator below can be used to convert between some common pressure units

Pressure Converting Tables

The tables below can be used to convert between some common pressure units:

For full table - rotate the screen!

Pressure Converter
Convert from Multiply by
Convert to
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!

Pressure Converter
Convert from Multiply by
Convert to
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
  • 1 Torr = 1 mm Hg

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).

Example - Convert from 10 psi to Pa

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

Some other Pressure Units

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

psi to bar Nomogram

psi to bar converter

Download and print psi to bar Converter!

psi to kPa Nomogram

psi to kPa converter

Download and print psi to kPa Converter!

kPa vs bar, psi, mmh2o and inh2o

Download kPa to bar, psi, mmH2O and inH2O chart

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