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Convert pound per square inch to bar

Here you can quickly calculate how many bar fit in one pound per square inch.
  • 1 psi = 0.068948 bar
  • 1 bar = 14.503774 psi

Pound per square inch to bar conversion table

pound per square inch bar
1 0.068948
2 0.137895
5 0.344738
10 0.689476
20 1.378951
50 3.447379
100 6.894757

Formula to convert pound per square inch to bar

To convert pound per square inch to bar, multiply by 0.068948.

1 psi = 0.068948 bar
Example: 1 pound per square inch = 0.068948 bar

Common mistakes in pressure conversion

  • Tire pressure is quoted in bar in Europe and psi in the US: 1 bar is about 14.5 psi. The recommended 2.5 bar equals about 36 psi, inflating to '25 psi' on the assumption they match leaves the tire dangerously underinflated. Multiply bar by 14.5 to get psi.
  • One atmosphere is not exactly one bar: 1 atm = 1.01325 bar = 101.325 kPa. There is also the technical atmosphere (1 kgf/cm²) at about 0.981 bar. The ~1% differences rarely matter day to day, but engineering and diving calculations need the right unit.

Quick pound per square inch to/from bar conversion quiz

Score: 0

22.7 pound per square inch equals 1.57 bar.

Correct answer: 22.7 pound per square inch = 1.57 bar.

18 bar equals 392 pound per square inch.

Correct answer: 18 bar = 261 pound per square inch.

1.5 pound per square inch equals 0.103 bar.

Correct answer: 1.5 pound per square inch = 0.103 bar.

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