What unit is commonly used to measure air pressure?

The unit commonly used to measure air pressure includes Pascals, which is indeed a fundamental SI unit. Pascals quantify pressure as force per unit area, with one Pascal being equivalent to one Newton per square meter. This unit is widely used in scientific contexts and is crucial for expressing atmospheric pressure in a standardized way.

While atmospheres, millimeters of mercury, and other units may also describe air pressure, Pascals are particularly favored in scientific applications due to their clear relationship with force and area, enabling precise calculations. Additionally, using Pascals aligns with the metric system, which is used globally, making it important in various scientific disciplines. Hence, while other units have their context, Pascals serve as a foundational measurement in atmospheric science and many fields of physics.