The pascal (symbol Pa) is the SI unit of pressure. It is equivalent to one newton per square metre. The unit is named after Blaise Pascal, the eminent French mathematician, physicist and philosopher.
 1 Pa
 = 1 N/m^{2} = 1 (kg·m/s^{2})/m^{2} = 1 kg/m·s^{2}

= 0.01 millibar

= 0.00001 bar
The same unit is also used for stress, Young's modulus and tensile strength.
Standard atmospheric pressure is 101 325 Pa = 101.325 kPa = 1013.25 hPa = 1013.25 mbar = 760 Torr (ISO 2533).
Meteorologists worldwide have for a long time measured air pressure in millibars. After the introduction of SI units, many preferred to preserve the customary pressure figures. Therefore, meteorologists use hectopascals today for air pressure, which are equivalent to millibars, while similar pressures are given in kilopascals in practically all other fields, where the hecto prefix is hardly ever used.
 1 hectopascal (hPa)
 = 100 Pa = 1 mbar
 1 kilopascal (kPa)
 = 1000 Pa = 10 hPa
In the former Soviet mts system the unit of pressure is the pieze, which is equivalent to one kilopascal.
The Unicode computer character set has dedicated symbols ㎩ for Pa and ㎪ for kPa, but these exist merely for backwardscompatibility with some older ideographic character sets.
Examples of various values (approximately)
(See SI prefix for guide to units.)
0.5 Pa 
Atmospheric pressure on Pluto (1988 figure; very roughly)

10 Pa 
Pressure increase per 1 mm of a water column¹

1 kPa 
Atmospheric pressure on Mars, ∼1 % of atmospheric sealevel pressure on Earth

10 kPa 
Pressure increase per 1 m of a water column¹, or
the drop in air pressure when going from Earth sea level to 1000 m elevation

101.325 kPa 
Standard atmospheric pressure for Earth sea level = 1013.25 hPa

10 MPa 
Pressure washers force out water at this pressure 
100 MPa 
Pressure at bottom of Mariana Trench, about 10 km below ocean surface

10 GPa 
Diamond forms

100 GPa 
Theoretical tensile strength of carbon nanotubes (CNTs)

¹at the Earth's surface
Comparison to other units of pressure