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Pressure Conversions
All pressure conversions
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Definition: Pressure is the force exerted on a specific area (pressure = force / area). The standard derived unit of pressure in the International System of Units (SI) is the pascal (Pa). Common units of pressure include atmospheres (atm), technical atmospheres (at), bars (bar), millibars (mbar), millimeters of mercury (mmHg), centimeters of water (cmH2O), inches of water (inH2O), kilopascals (kPa), pounds per square inch (psi), pounds per square foot (psf) and torr (Torr). |
Common pressure conversions
- 1 pascal (Pa) = 10-5 bar (bar) = 9.8692x10-6 atmospheres (atm)
- 1 atmosphere (atm) = 1.0332 technical atmospheres (at) = 760 torr (Torr)
- 1 pound per square inch (psi) = 6.895x103 pascals (Pa) = 68.046x10-3 atmospheres (atm)
- 1 torr (Torr) = 133.322 pascals (Pa) = 1 millimeter of mercury (mmHg)
- 1 bar (bar) = 105 pascals (Pa) = 0.98692 atmospheres (atm)
- 1 technical atmosphere (at) = 735.56 torr (Torr)
Chart: Subdivisions and multiples of the pascal using SI prefixes
| Subdivisions of the pascal | Multiples of the pascal | ||||
| Name | Symbol | Value | Name | Symbol | Value |
| decipascal | dPa | 10-1 Pa | decapascal | daPa | 101 Pa |
| centipascal | cPa | 10-2 Pa | hectopascal | hPa | 102 Pa |
| millipascal | mPa | 10-3 Pa | kilopascal | kPa | 103 Pa |
| micropascal | μPa | 10-6 Pa | megapascal | MPa | 106 Pa |
| nanopascal | nPa | 10-9 Pa | gigapascal | GPa | 109 Pa |
| picopascal | pPa | 10-12 Pa | terapascal | TPa | 1012 Pa |
| femtopascal | fPa | 10-15 Pa | petapascal | PPa | 1015 Pa |
| attopascal | aPa | 10-18 Pa | exapascal | EPa | 1018 Pa |
| zeptopascal | zPa | 10-21 Pa | zettapascal | ZPa | 1021 Pa |
| yoctopascal | yPa | 10-24 Pa | yottapascal | YPa | 1024 Pa |
Below you can find a comprehensive list with conversions from and to various (metric, imperial, or customary) pressure measurement units.
