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.

atmosphere (at) techn. atmosphere (atm) phys. bar barad barye cm of mercury (Hg) (0°C) cm of water (H2O) (4°C) dyne / cm2 foot of water (H2O) (4°C) gigapascal hectopascal inch mercury (Hg) (0°C) inch of mercury (Hg) (16°C) inch of water (H2O) (16°C) inch of water (H2O) (4°C) kg force/ cm2 kg force/ dm2 kg force/ m2 kg force / mm2 kilopascal kips per square inch megapascal meter of water H2O (16°C) meter of water H2O (4°C) mikrobar (µbar), barye, barrie micron of mercury (Millitorr) millibar millimeter of mercury mm Hg (0°C) millimeter of water mm H2O (16°C) millimeter of water mm H2O (4°C) millitorr newton/m2 = pascal ounce (avdp) / square inch pascal = N / m2 pounds per square foot psi = pounds per square inch poundal per square foot poundal per square inch standard atmosphere atm ton (long) per square foot ton (long) per square inch tonne (metric) / cm2 ton (short) per square foot ton (short) per square inch ton per square inch torr

Pressure conversion chart

Unit Name	Symbol	SI Equivalent Pa = N/m2
atmosphere (metric) techn.	at	9.806650 x 104 Pa
atmosphere (metric) phys.	atm	1.013250 x 105 Pa
atmosphere (metric)	bar	1 x 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 x 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 x 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 x 106 Pa
kilopascal	kPa	1000 Pa
kilopound force per square inch	kip/in2, ksi, KSI	6.89476 x 106 Pa
megapascal	MPa	1 x 106 Pa
meter of water (4 °C)	mH2O, mCE (4 °C)	9806.38 Pa
meter of water (16 °C)	mH2O, mCE (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, Torr (0 °C)	133.322368 Pa
millimeter of mercury (16°C)	mm Hg, torr, Torr (16 °C)	Pa
millimeter of water (4 °C)	mm H2O, mmCE (4 °C)	9.80638 Pa
millimeter of water (16 °C)	mm H2O, mmCE (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 x 105 Pa
ton force (long) per square foot	tonf/ft2 (UK)	1.07252 x 105 Pa
ton force (long) per square inch	tonf/in2 (UK)	1.54443 x 107 Pa
ton force (short) per square foot	tonf/ft2 (US)	9.57605 x 104 Pa
ton force (short) per square inch	tonf/in2 (US)	1.37895 x 107 Pa
ton force (metric) per square centimeter	tonf/cm2 (metric)	9.80665 x 107 Pa
ton force (metric) per square meter	tonf/m2 (metric)	9806.65 Pa
torr	torr	133.322368 Pa