The SI unit of pressure is

Pascal is the SI unit of pressure. It is denoted as Pa and defined as the force of one newton per square meter:The SI was established in 1960 and is based on the metre-kilogram-second system rather than the centimetre-gram-second system. There are seven base units, each representing a different kind of physical quantity. Pressure, the effect of a force applied to a surface, is a derived unit.

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