What is the unit of pressure?

The unit of pressure is the Pascal (Pa), which is defined as one newton per square meter. This unit measures the amount of force applied over a specific area, thereby quantifying the pressure exerted. In practical terms, pressure is often encountered in various applications, such as weather systems, engineering, and aerodynamics, where understanding how pressure affects forces is essential.

The Pascal is a coherent unit in the International System of Units (SI) and provides a universal standard to facilitate communication and calculations across different fields. Other units of pressure, such as bar or psi, can also be converted to Pascals, underscoring its widespread acceptance and use.

The alternatives presented, such as watt (a unit of power), joule (a unit of energy), and newton (a unit of force), serve different purposes in physics and engineering but are not applicable to the measurement of pressure. Each of these terms belongs to a different category of measurement, illustrating the specific nature of pressure as an area-related force metric.