Atmosphere to PSI Converter

An atmosphere (atm) is a unit of pressure defined as exactly 101,325 pascals, representing the average atmospheric pressure at sea level. It serves as a reference pressure for many scientific and engineering applications.

The atmosphere was originally defined as the pressure exerted by the Earth's atmosphere at sea level. It became a standard reference pressure in chemistry and physics, providing a convenient baseline for pressure measurements and calculations.

Atmospheres are used in chemistry, physics, and engineering as a reference pressure. They're standard for gas law calculations, chemical reaction conditions, and scientific applications where atmospheric pressure serves as a convenient reference.

Pounds per square inch (psi) is a unit of pressure representing the pressure exerted by one pound-force applied to an area of one square inch. It's widely used in the United States for various pressure applications.

PSI developed with the imperial system and became standard in American engineering and industry. It provided an intuitive pressure unit based on familiar force and area measurements, becoming deeply embedded in US industrial and automotive applications.

PSI is extensively used in the United States for tire pressure, hydraulic systems, pneumatic tools, and industrial applications. It's standard for automotive tire specifications, air compressor ratings, and hydraulic system pressures in American industry.