The pascal (symbol: Pa) 's the SI derived unit of pressure, stress, Young's modulus and tensile strength. It's a measure of force per unit area, equivalent to one newton per square metre or one joule per cubic metre. In everyday life, the pascal's perhaps best known from meteorological barometric pressure reports, where it occurs in the form of hectopascals (1 hPa ≡ 100 Pa) or kilopascals (1 kPa = 1000 Pa). In other contexts, the kilopascal's commonly used, for example on bicycle tire lab… (More on Kilopascal)