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This article is about the unit of pressure. For other uses see Pascal (disambiguation)

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, a French mathematician, physicist and philosopher.

Since 1 Pa is a small pressure, the unit hectopascal (symbol hPa) is more widely used, especially in meteorology. The unit kilopascal (symbol kPa) is also in common use.

1 hectopascal = 100 pascal = 1 millibar.
1 kilopascal = 1000 pascal

The same unit is used to measure stress, Young's modulus and tensile strength.

Table of contents
1 Examples of various values (approximately)
2 Comparison to other units of pressure
3 External links

Examples of various values (approximately)

0.5 PaAtmospheric pressure on Pluto (1988 figure; very roughly)
10 (really 9,81) PaThe pressure at a depth of 1 mm of water
1 kPaAtmospheric pressure on Mars
10 kPaThe pressure at a depth of 1 m of water, or
the drop in air pressure when going from sea level to 1000 m elevation
100 kPaAtmospheric pressure at sea level
10 MPaPressure washer forces out water at this pressure
100 MPaPressure at bottom of Marianas Trench, about 10 km under ocean
10 GPaDiamond forms
100 GPaCarbon nanotubes (CNTs)

Comparison to other units of pressure

1 bar100,000 Pa
1 millibar100 Pa
1 atmosphere101,325 Pa
1 mm Hg*133 Pa
1 inch Hg*3,386 Pa


External links

[ Conversion Calculator for Units of PRESSURE & STRESS]