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Pressure Units - Online Converter

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Pressure Converter

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

Value (use period as decimal point)

Pa (N/m2)

kPa

bar

atmosphere

mm Hg

mm H2O

m H2O

kgf/m2

kgf/cm2

pound square feet (psf)

pound square inches (psi)

inches Hg

inches H2O

ft H2O


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Pressure Converting Tables

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

For full table - rotate the screen!

Multiply by
Convert from 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!

Multiply by
Convert from 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

Download and print psi to bar Converter!

psi to kPa Nomogram

Download and print psi to kPa Converter!

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