Pascal (unit)

A pressure gauge reading in psi (red scale) and kPa (black scale)
General information
Unit systemSI unit
Unit ofPressure or stress
Named afterBlaise Pascal
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. The unit, named after Blaise Pascal, is defined as one newton per square metre.[1] The unit of measurement called standard atmosphere (atm) is defined as 101325 Pa.[2]

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. Meteorological forecasts typically report atmospheric pressure in hectopascals per the recommendation of the World Meteorological Organization. Forecasts in the United States typically use millibars,[3][4] in Canada these reports are given in kilopascals.[5]


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][7]

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 (uned)
eesti: Paskal
español: Pascal (unidad)
français: Pascal (unité)
hrvatski: Paskal
Bahasa Indonesia: Pascal (satuan)
interlingua: Pascal (unitate)
íslenska: Paskal
ქართული: პასკალი
Kiswahili: Paskali
Kreyòl ayisyen: Paskal
latviešu: Paskāls
македонски: Паскал (единица)
Bahasa Melayu: Pascal (unit)
Nederlands: Pascal (eenheid)
Nordfriisk: Pascal (ianhaid)
norsk nynorsk: Pascal
oʻzbekcha/ўзбекча: Paskal (oʻlchov birligi)
ភាសាខ្មែរ: ប៉ាស្កាល់
Piemontèis: Pascal
Plattdüütsch: Pascal (Eenheit)
polski: Paskal
português: Pascal (unidade)
සිංහල: පැස්කලය
Simple English: Pascal (unit)
slovenčina: Pascal
slovenščina: Paskal
српски / srpski: Паскал (јединица)
srpskohrvatski / српскохрватски: Paskal
Türkçe: Pascal (birim)
українська: Паскаль (одиниця)
اردو: پاسکل
Tiếng Việt: Pascal (đơn vị)
吴语: 帕斯卡
粵語: 帕斯卡
中文: 帕斯卡