General Unit Converter
About Pressure Units
Pressure conversions are used in general engineering as well as meteorology, aerospace, diving, gas cylinder use (welding, bar tap operation, instrumentation and others), projectile and construction physics, inflatable rubber products, injection moulding and more.
The SI unit for pressure is Pascal (Pa), the standard atmospheric pressure at sea level is 101235 Pa which is one atmospheric unit (atm). The older unit of measurement Torr (or mmHg) is still used and pressure at submerged depths of water (msw, fsw) are used in diving. 
Pressure Converter
Atmospheres (atm, standard)
Pascals (Pa)
Kilopascals (kPa)
Torr (or mmHg)
Bar (bar)
Millibar (mbar)
Pounds per sq. inch (psi)
Atmospheres (at, technical)
(Function 1)
Hectopascals (hPa)
Megapascals (MPa)
Barye (Ba)
Kilogram per square inch (ksi)
Meters sea water (msw)
Feet sea water (fsw)
Centimeters of water (cmH2O)
Inches of Mercury (inHg)
Pressure Unit Converter
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