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| ● Converison of pressure or stress units ● Definition: pressure = force per area; p = F/A; F = force, A = area, p = pressure The SI unit of the pressure is the pascal with the formula sign Pa. 1 Pascal is equal to the pressure of 1 newton per square meter. 1 Pa = 1 N / m2 ≡ 1 kg / m · s2. The standard atmospheric pressure is 101,325 pascal = 1,013.25 hPa = 101.325 kPa = 760 mmHg = 29.92 inHg = 14.7 lb/in2. Good to know: 1 Pa = 1 N/m2 ≡ 94 dBSPL and 1 bar = 105 Pa Fill in the appropriate line the known pressure value Attention: Do not re-enter the exact number of an answer. |
Standard atmospheric pressure is 101325 pascals = 1013.25 hPa = 101.325 kPa
Conversion of pressure or stress units chart or table
| psi | kPa | kg/cm2 | cm H2O |
feet H2O |
inch Hg |
mm Hg = torr |
inch H2O |
ounce per sq. inch |
Atmospheres | bar | mbar | MPa | |
| psi | 1 | 6.894757 | 0.070306958 | 70.306927 | 2.306723 | 2.03602 | 51.71486 | 27.68068 | 16 | 0.068046 | 0.06894757 | 68.9476 | 0.00689 |
| kPa | 0.1450377 | 1 | 0.01019716 | 10.19745 | 0.3345618 | 0.2952997 | 7.50061 | 4.01472 | 2.320603 | 0.009669235 | 0.01 | 10 | 0.001 |
| kg/cm2 | 14.223343 | 98.06694 | 1 | 1000.026 | 32.809312 | 28.95901 | 735.5588 | 393.711806 | 227.57349 | 0.967841596 | 0.98066494 | 1013.25 | 0.09806 |
| cm H2O | 0.0142229 | 0.0980634 | 0.00099997 | 1 | 0.032808 | 0.0289581 | 0.7355372 | 0.3937 | 0.227566 | 0.000967814 | 0.000980634 | 0.980665 | 0.00098 |
| feet H2O | 0.433515 | 2.968961 | 0.03047912 | 30.48 | 1 | 0.882646 | 22.4192 | 12 | 6.93624 | 0.02949896 | 0.02968961 | 29.689 | 0.00298 |
| inch Hg | 0.4911542 | 3.386389 | 0.0345316 | 34.53253 | 1.132957 | 1 | 25.4 | 13.595484 | 7.85847 | 0.0334211 | 0.03386389 | 33.8639 | 0.00386 |
| mm Hg = torr | 0.0193368 | 0.1333225 | 0.00135951 | 1.359554 | 0.0446046 | 0.039370079 | 1 | 0.535255 | 0.3093888 | 0.0013157895 | 0.001333225 | 1.33322 | 0.00013 |
| inch H2O | 0.03612628 | 0.2490819 | 0.00254219 | 2.54 | 0.08333 | 0.0735539 | 1.8682683 | 1 | 0.57802 | 0.00245825 | 0.002490819 | 2.49089 | 0.000249 |
| ounce per square inch | 0.0625 | 0.4309223 | 0.004394308 | 4.394308 | 0.14417 | 0.12725125 | 3.23218 | 1.73004 | 1 | 0.004252875 | 0.004309223 | 4.309 | 0.0004309 |
| Atmospheres | 14.696 | 101.325 | 1.033231 | 1033.2633 | 33.8995 | 29.9213 | 760 | 406.794 | 235.136 | 1 | 1.01325 | 1013.25 | 0.1013 |
| bar | 14.5038 | 100 | 1.019716 | 1019.7466 | 33.4833 | 29.53 | 750.0626 | 401.8596 | 232.0608 | 0.986923 | 1 | 1000 | 0.1 |
| mbar | 0.0145 | 0.1 | 0.001019 | 1.019 | 0.003456 | 0.02953 | 0.75006 | 0.40146 | .23206 | 0.00099 | 0.001 | 1 | 0.0001 |
| MPa | 145.0377 | 1000 | 10.197 | 10197.45 | 334.56 | 295.299 | 7500.61 | 4014.74 | 2320.603 | 9.669 | 10 | 10000 | 1 |
Conversions of other pressure units
| Unit Name | Symbol | SI Equivalent Pa = N/m2 |
| atmosphere (metric) techn. | at | 9.806650×104 Pa |
| atmosphere (metric) phys. | atm | 1.013250×105 Pa |
| atmosphere (metric) | bar | 1×105 Pa |
| barad | barad | 0.1 Pa |
| barye | 0.1 Pa | |
| centimeter of mercury (0 °C) | cm Hg (0 °C) | 1333.223684210526 Pa |
| centimeter of mercury (16 °C) | cm Hg (16 °C) | 1329.598425 Pa |
| centimeter of water (4 °C) | cm H2O (4 °C) | 98.06376018 Pa |
| centimeter of water (16 °C) | cm H2O (16 °C) | 97.9706 Pa |
| dyne per square centimeter | dyn/cm2 | 0.1 Pa |
| foot of water (4 °C) | ft H2O (4 °C) | 2988.98 Pa |
| foot of water (16 °C) | ft H2O (16 °C) | 2986.08 Pa |
| gigapascal | GPa | 1×109 Pa |
| hectopascal | hPa | 100 Pa |
| inch of mercury (0 °C) | in Hg (0 °C) | 3386.388157894736 Pa |
| inch of mercury (16 °C) | in Hg (16 °C) | 3377.18 Pa |
| inch of water (4 °C) | in H2O (4 °C) | 249.0819508572 Pa |
| inch of water (16 °C) | in H2O (16 °C) | 248.845 Pa |
| kilogram force per square centimeter | kgf/cm2 | 9.80665×104 Pa |
| kilogram force per square decimeter | kgf/dm2 | 980.665 Pa |
| kilogram force per square meter | kgf/m2 | 9.80665 Pa |
| kilogram force per square millimeter | kgf/mm2 | 9.80665×106 Pa |
| kilopascal | kPa | 1000 Pa |
| kilopound force per square inch | kip/in2, ksi, KSI | 6.89476 · 106 Pa |
| megapascal | MPa | 1×106 Pa |
| meter of water (4 °C) | m H2O, (4 °C) | 9806.38 Pa |
| meter of water (16 °C) | m H2O, (16 °C) | 9797.06 Pa |
| microbar (barye, barrie) | µbar | 0.1 Pa |
| micron of mercury (millitorr) | µHg (0 °C) | 0.133322 Pa |
| millibar | mbar | 100 Pa |
| millimeter of mercury (0 °C) | mm Hg, torr, (0 °C) | 133.322368 Pa |
| millimeter of mercury (16°C) | mm Hg, torr, (16 °C) | Pa |
| millimeter of water (4 °C) | mm H2O, (4 °C) | 9.80638 Pa |
| millimeter of water (16 °C) | mm H2O, (16 °C) | 9.79706 Pa |
| millitorr | mtorr | 0.133322 Pa |
| newton per square meter | N/m2 | 1 Pa |
| ounce force (av.) per square inch | ozf/in2, osi | 430.922 Pa |
| pascal | Pa, N/m2 | 1 Pa |
| pound force per square foot | lbf/ft2 | 47.8803 Pa |
| pound force per square inch | psi, PSI, lbf/in2 | 6894.76 Pa |
| poundal per square foot | pdl/ft2 | 1.48816 Pa |
| poundal per square inch | pdl/in2 | 214.296 Pa |
| standard atmosphere | atm | 1.01325×105 Pa |
| ton force (long) per square foot | tonf/ft2 (UK) | 1.07252×105 Pa |
| ton force (long) per square inch | tonf/in2 (UK) | 1.54443×107 Pa |
| ton force (short) per square foot | tonf/ft2 (US) | 9.57605×104 Pa |
| ton force (short) per square inch | tonf/in2 (US) | 1.37895×107 Pa |
| ton force (metric) per square centimeter | tonf/cm2 (metric) | 9.80665×107 Pa |
| ton force (metric) per square meter | tonf/m2 (metric) | 9806.65 Pa |
| torr | torr | 133.322368 Pa |
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