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.

Convert from atmosphere (standard) (atm)	Convert to atmosphere (standard) (atm)
Convert from atmosphere (technical) (at)	Convert to atmosphere (technical) (at)
Convert from bar (bar)	Convert to bar (bar)
Convert from millibar (mbar)	Convert to millibar (mbar)
Convert from centibar (cbar)	Convert to centibar (cbar)
Convert from decibar (dbar)	Convert to decibar (dbar)
Convert from kilobar (kbar)	Convert to kilobar (kbar)
Convert from megabar (Mbar)	Convert to megabar (Mbar)
Convert from gigabar (Gbar)	Convert to gigabar (Gbar)
Convert from barye (Ba)	Convert to barye (Ba)
Convert from centimeter of mercury (cmHg)	Convert to centimeter of mercury (cmHg)
Convert from centimeter of water (cmH2O)	Convert to centimeter of water (cmH2O)
Convert from inch of mercury (inHg)	Convert to inch of mercury (inHg)
Convert from inch of water (inH2O)	Convert to inch of water (inH2O)
Convert from dyne per square centimeter (dyn/cm²)	Convert to dyne per square centimeter (dyn/cm²)
Convert from gigapascal (GPa)	Convert to gigapascal (GPa)
Convert from kilogram-force per square centimeter (kgf/cm²)	Convert to kilogram-force per square centimeter (kgf/cm²)
Convert from kilogram-force per square millimeter (kgf/mm²)	Convert to kilogram-force per square millimeter (kgf/mm²)
Convert from kilopascal (kPa)	Convert to kilopascal (kPa)
Convert from kip per square inch (ksi)	Convert to kip per square inch (ksi)
Convert from megapascal (MPa)	Convert to megapascal (MPa)
Convert from millimeter of mercury (mmHg)	Convert to millimeter of mercury (mmHg)
Convert from millimeter of water (mmH2O)	Convert to millimeter of water (mmH2O)
Convert from millipascal (mPa)	Convert to millipascal (mPa)
Convert from newton per square meter (N/m²)	Convert to newton per square meter (N/m²)
Convert from newton per square millimeter (N/mm²)	Convert to newton per square millimeter (N/mm²)
Convert from pascal (Pa)	Convert to pascal (Pa)
Convert from hectopascal (hPa)	Convert to hectopascal (hPa)
Convert from pieze (pz)	Convert to pieze (pz)
Convert from pound per square foot (psf)	Convert to pound per square foot (psf)
Convert from pound per square inch (psi)	Convert to pound per square inch (psi)
Convert from torr (Torr)	Convert to torr (Torr)