Pressure is a fundamental concept in physics and engineering, and it is measured using various units. Here are the common units of pressure listed in order from the smallest to the largest unit:
- Pascal (Pa): The Pascal is the SI unit of pressure. It is defined as one newton per square meter. It is the smallest unit of pressure.
- Millibar (mbar): The millibar is commonly used in meteorology. 1 millibar is equal to 100 Pascals.
- Bar (bar): The bar is a metric unit of pressure, but not part of the International System of Units (SI). 1 bar is equal to 100,000 Pascals.
- Atmosphere (atm): The atmosphere is a unit of pressure defined as 101,325 Pascals. It is approximately equal to the average atmospheric pressure at sea level on Earth.
- Torr (Torr): The Torr is a unit of pressure based on an absolute scale, named after Evangelista Torricelli. 1 Torr is equal to 1/760 of an atmosphere.
- Pounds per square inch (psi): The psi is a unit of pressure commonly used in the United States. 1 psi is equal to 6,894.76 Pascals.
These units are used in different contexts depending on the field of study or application. Understanding these units and their relationships is essential for accurate measurements and conversions.