PSI to Bar Converter

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.

A bar is a unit of pressure equal to 100,000 pascals (10⁵ Pa), approximately equal to atmospheric pressure at sea level. It's widely used in meteorology, engineering, and industrial applications as a practical pressure unit.

The bar was introduced in 1909 as a convenient unit close to atmospheric pressure. It became widely adopted in meteorology and engineering because it provided a practical scale for atmospheric and industrial pressure measurements.

Bars are extensively used in meteorology, industrial pressure systems, automotive applications, and engineering. They're standard for weather maps, industrial pressure gauges, automotive turbocharger specifications, and hydraulic system ratings.