# Pascal (unit)

Pascal
A pressure gauge reading in psi (red scale) and kPa (black scale)
General information
Unit systemSI derived unit
Unit ofPressure or stress
SymbolPa
Named afterBlaise Pascal
Conversions
1 Pa in ...... is equal to ...
SI base units:   kgm−1s−2
US customary units:   1.450 × 10−4 psi
atmosphere:   9.869 × 10−6 atm
bar:   10−5 bar

The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus and ultimate tensile strength. It is defined as one newton per square metre.[1] It is named after the French polymath Blaise Pascal.

Common multiple units of the pascal are the hectopascal (1 hPa = 100 Pa) which is equal to one millibar, and the kilopascal (1 kPa = 1000 Pa) which is equal to one centibar.

The unit of measurement called standard atmosphere (atm) is defined as 101325 Pa.[2] Meteorological reports in the United States typically state atmospheric pressure in millibars.[3][4] In Canada these reports are given in kilopascals.[5]

## Etymology

The unit is named after Blaise Pascal, noted for his contributions to hydrodynamics and hydrostatics, and experiments with a barometer. The name pascal was adopted for the SI unit newton per square metre (N/m2) by the 14th General Conference on Weights and Measures in 1971.[6]

Other Languages
Afrikaans: Pascal (eenheid)
Alemannisch: Pascal (Einheit)
العربية: باسكال (وحدة)
asturianu: Pascal (unidá)
Bân-lâm-gú: Pascal (tan-ūi)
беларуская (тарашкевіца)‎: Паскаль (адзінка вымярэньня)
български: Паскал (единица)
བོད་ཡིག: ཕ་སི་ཁལ།
brezhoneg: Pascal
Cymraeg: Pascal
français: Pascal (unité)
Bahasa Indonesia: Pascal (satuan)
ქართული: პასკალი
македонски: Паскал (единица)
Bahasa Melayu: Pascal (unit)
Nederlands: Pascal (eenheid)
Nordfriisk: Pascal (ianhaid)
norsk nynorsk: Pascal
ភាសាខ្មែរ: ប៉ាស្កាល់
Piemontèis: Pascal
Plattdüütsch: Pascal (Eenheit)