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Pressure Conversion
  psi kPa kg/cm2 cm of
H2O		 in of
H2O		 ft of
H2O		 in of
Hg		 mm of
Hg		 oz/in2 atmo-
spheres		 bar mbar MPa
psi 1 6.894757 .0703069 70.30692 27.68068 2.306723 2.03602 51.71486 16 .0680460 .0689474 68.9475 .00689
kPa .1450377 1 .0101971 10.19745 4.01472 .3345618 .2952997 7.500610 2.320603 .987 .01 10 .001
kg/cm2 14.22334 98.06694 1 1000.026 393.361 32.80931 28.95901 735.5588 227.5734 .9678416 .9806649 981.354 .098135
cm of H2O .0142229 .0980634 .0009999 1 .3937 .032808 .0289581 .7355372 .227566 .0009678 .0009806 .9806 .000098
in of H2O .036125 .2490819 .0025421 2.54 1 .08333 .0735539 1.868268 .578020 .0024582 .0024908 2.49089 .000249
ft of H2O .433515 2.98898 .0304791 30.480 12 1 .882646 22.4192 6.93624 .0294989 .0296865 29.865 .00298
in of Hg .4911542 3.386389 .0345316 34.53253 13.59548 1.132957 1 25.4 7.85847 .0334211 .0338638 33.8639 .003386
mm of Hg .0193368 .1333225 .0013595 1.359554 .535255 .0446046 .0393700 1 .3093888 .0013158 .0013332 1.33322 .00013
oz/in2 .0625 .4309223 .0043943 4.394308 1.73004 .14417 .1272514 3.23218 1 .0042529 .0043092 4.309 .0004309
atmospheres 14.6960 101.3253 1.033231 1033.263 406.794 33.8995 29.9213 760 235.136 1 1.013254 1013.25 .1013
bar 14.5038 100 1.019716 1019.746 401.47 33.4833 29.5300 750.0626 232.0608 .986923 1 1000 .1
mbar .0145 .1 .001019 1.019 .40147 .003348 .02953 .75006 .23206 .00099 .001 1 .0001
MPa 145 1000 10.197 10197.45 4041.74 334.56 295.229 7500.61 2320.603 9.872 .1 1000 1
 
Table of Equivalents
Atmospheres x
=		 33.9 =
÷		 Feet of Water
Atmospheres x
=		 29.92 =
÷		 Inches of
Mercury
Atmospheres x
=		 14.7 =
÷		 PSI
BTU x
=		 778.3 =
÷		 Foot-Pounds
BTU
per hour		 x
=		 0.2931 =
÷		 Watts
BTU
per minute		 x
=		 0.02356 =
÷		 Horsepower
Centimetres x
=		 0.3937 =
÷		 Inches
Cubic
Centimetres		 x
=		 0.0002642 =
÷		 Gallons (US)
Cubic
Centimetres		 x
=		 0.001 =
÷		 Litres
Cubic Feet x
=		 1728 =
÷		 Cubic Inches
Cubic Feet x
=		 7.48052 =
÷		 Gallons (US)
Cubic Inches x
=		 0.0005787 =
÷		 Cubic Feet
Cubic Inches x
=		 0.004329 =
÷		 Gallons (US)
Days x
=		 86 400 =
÷		 Seconds
Degrees (angle) x
=		 0.01745 =
÷		 Radians
Feet x
=		 0.3048 =
÷		 Metres
Feet x
=		 0.0001894 =
÷		 Miles (statute)
Feet of Water x
=		 0.0295 =
÷		 Atmospheres
Feet of Water x
=		 0.8826 =
÷		 Inches of
Mercury
Feet of Water x
=		 0.4335 =
÷		 PSI
Feet per
Minute		 x
=		 0.1136 =
÷		 Miles per
Hour
Feet Per
Second		 x
=		 0.6818 =
÷		 Miles per
Hour
Foot-Pounds x
=		 .001286 =
÷		 BTU
Foot-Pounds
per Minute		 x
=		 .0000303 =
÷		 Horsepower
Foot-Pounds
per Second		 x
=		 .001818 =
÷		 Horsepower
Gallons (US) x
=		 0.1337 =
÷		 Cubic Feet
Gallons (US) x
=		 231 =
÷		 Cubic Inches
Gallons of
Water		 x
=		 8.3453 =
÷		 Pounds of
Water
Horsepower x
=		 42.44 =
÷		 BTU per
Minute
Horsepower x
=		 33 000 =
÷		 Foot-Pounds
per Minute
Horsepower x
=		 550 =
÷		 Foot-Pounds
per Second
Horsepower x
=		 745.7 =
÷		 Watts
Hours x
=		 0.04167 =
÷		 Days
Hours x
=		 0.005952 =
÷		 Weeks
Inches x
=		 2.54 =
÷		 Cenimetres
Inches of
Mercury		 x
=		 0.03342 =
÷		 Atmospheres
Inches of
Mercury		 x
=		 1.133 =
÷		 Feet of
Water
Inches of
Mercury		 x
=		 0.4912 =
÷		 PSI
Inches of
Water		 x
=		 0.03613 =
÷		 PSI
Litres x
=		 1000 =
÷		 Cubic
Centimetres
Litres x
=		 0.2642 =
÷		 Gallons (US)
Micron x
=		 0.00004 =
÷		 Inches
Miles
(statute)		 x
=		 5280 =
÷		 Feet
Miles per
Hour		 x
=		 88 =
÷		 Feet per
Minute
Miles per
Hour		 x
=		 1.467 =
÷		 Feet per
Second
Ounces
(weight)		 x
=		 0.0625 =
÷		 Pounds
Ounces
(liquid)		 x
=		 1.805 =
÷		 Cubic Inches
Pints
(liquid)		 x
=		 0.5 =
÷		 Quarts
(liquid)
Pounds x
=		 7000 =
÷		 Grains
Pounds x
=		 453.59 =
÷		 Grams
Pounds x
=		 16 =
÷		 Ounces
PSI x
=		 0.6804 =
÷		 Atmospheres
PSI x
=		 2.307 =
÷		 Feet of
Water
PSI x
=		 2.036 =
÷		 Inches of
Mercury
Quarts x
=		 0.25 =
÷		 Gallons
Square Feet x
=		 144 =
÷		 Square Inches
Temperature
(°F-32)		 x
=		 0.5555 =
÷		 Temperature
(°C)
Tons (US) x
=		 2000 =
÷		 Pounds
Watts x
=		 0.001341 =
÷		 Horsepower


Reference > Conversions
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