The SI unit of pressure is the Pascal (Pa), represented as Pa. It is defined as the pressure exerted by a force of one Newton per square meter (N/m² or kg m⁻¹s⁻²). This means that if a force of one Newton is applied to an area of one square meter, the resulting pressure is one Pascal.

In other words, one Pascal is equal to a force of one Newton acting on an area of one square meter. This makes Pascal the standard unit for pressure in the International System of Units (SI).

In practice, pressure is often measured in units of kilopascals (kPa) or megapascals (MPa), which are equal to 1,000 and 1,000,000 Pascals, respectively. Other commonly used units of pressure include atmospheres (atm), bars (bar), and pounds per square inch (psi). However, the use of Pascal as the standard unit of pressure ensures consistency and ease of conversion between different units of pressure.

The SI unit of pressure, the pascal (Pa), is named after the French mathematician and physicist Blaise Pascal.

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