Bars to Pounds per Square Inch Converter

To convert a measurement in bars to pounds per square inch, multiply the value by 14.503774. The conversion factor comes from the relationship between both units and the pascal.

For example, to convert 5 bar to pounds per square inch: 5 × 14.503774 = 72.518869 psi.

A bar is a metric unit of pressure equal to exactly 100,000 pascals, roughly equal to atmospheric pressure at sea level. Introduced by Norwegian meteorologist Vilhelm Bjerknes, the bar takes its name from the Greek 'baros' (weight). Although not an SI unit, it remains popular in industry, diving, and weather because it is close to one atmosphere.

Common uses of bars include: Scuba diving depth and tank pressure; Industrial hydraulics and pneumatics; European tire and automotive pressure; Weather systems (via millibars).

Pounds per square inch (psi) is an imperial unit of pressure equal to the force of one pound-force applied to an area of one square inch, or about 6,894.76 pascals. Rooted in the imperial system, psi remains the dominant pressure unit in the United States. It appears on tire gauges, air compressors, and hydraulic equipment throughout North America.

Common uses of pounds per square inch include: Tire pressure in the United States; Air compressors and pneumatic tools; Hydraulic system ratings; Plumbing and water pressure specifications.

Scuba divers, cyclists, and industrial operators frequently convert bar to psi. A diving cylinder filled to 200 bar must be understood as roughly 2,900 psi when working with US-made gauges, and European car tire specs in bar need translating to psi for American equipment.

Here are some common values converted:

1 bar = 14.503774 psi 5 bar = 72.518869 psi 10 bar = 145.037738 psi 50 bar = 725.188689 psi 100 bar = 1,450.3774 psi