PSI to Bar Converter

How to convert pounds per square inch to bar

1 pound per square inch = 0.0689475729 bar. To convert pounds per square inch to bar, divide by 14.50377377 (or multiply by 0.0689475729). One psi is one pound-force on one square inch, exactly 6,894.757293168 Pa. A bar is exactly 100,000 pascals, close to one atmosphere (1.01325 bar).

Worked examples

• 32 pounds per square inch = 2.20632 bar (32 ÷ 14.503774)
• 100 pounds per square inch = 6.89476 bar (100 ÷ 14.503774)
• 3,000 pounds per square inch = 206.843 bar (3,000 ÷ 14.503774)

Where this conversion comes up

Pounds per square inch are used for tire pressure, compressors and plumbing in the US; bar for tire pressure in Europe, scuba tanks, espresso machines and weather. Divide by 14.5: 32 psi in a tire is 2.2 bar, 100 psi is 6.9 bar and a 3,000 psi scuba tank is 207 bar. Atmospheric pressure is 14.7 psi (1.013 bar).

Quick estimate

Divide by 14.5, or multiply by 0.069.

Common mistakes

• Multiplying instead of dividing. A bar is larger than a pound per square inch, so the number of bar must come out smaller: 32 pounds per square inch = 2.20632 bar.
• Rounding too early. Keep the full factor until the last step; rounding 0.0689 to 0.069 first puts large values noticeably off.

Going the other way? Use the bar to psi converter. Related pressure converters: kpa to psi, psi to kpa, mpa to psi, psi to mpa.