# What is the SI unit of pressure?

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.

• The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N/m2, or kg·m−1·s−2).
• Pascal is a so-called coherent derived unit in the SI with a special name and symbol.