A simple and easy-to-use pressure unit converter.
This app is free of charge.
Available area unit conversions include:

pascal (Pa)
megapascal (MPa)
kilopascal (kPa)
hectopascal (hPa)
decipascal (dPa)
centipascal (cPa)
millipascal (mPa)
newton/square meter (N/m^2)
newton/square centimeter (N/cm^2)
newton/square millimeter (N/mm^2)
kilonewton/square meter (kN/m^2)
bar
millibar (mbar)
dyne/square centimeter (dyn/cm^2)
kilogram-force/square meter (kgf/m^2)
gram-force/square centimeter (gf/cm^2)
psi
torr (Torr)
millimeter mercury (0 C) (mmHg)
centimeter water (4 C) (cmAq)
Standard atmosphere (atm)
joule/cubic meter (J/m^3),
joule/cubic centimeter (J/cm^3),
kilojoule/cubic meter (kJ/m^3),
pound/square foot (lb/ft^2),
centimeter mercury (0 C) (cmHg),
inch water (4 C) (inAq),
foot water (4 C) (ftAq),
technical atmosphere (at)