How to convert pounds per square inch to bar
1 psi ≈ 0.0689476 bar
1 psi ≈ 6,894.757 Pa (NIST SP 811) and 1 bar = 100,000 Pa exactly (SI Brochure), so 1 psi ≈ 0.06894757 bar. Equivalently, divide psi by about 14.50377.
Examples
- 32 psi = 2.2063223 bar: a tire gauge reading
- 15.6 psi = 1.0755821 bar: highest match-ball pressure allowed by football’s Laws of the Game (IFAB)
Psi to bar chart
| Pounds per square inch (psi) | Bar (bar) |
|---|---|
| 1 psi | 0.068947573 bar |
| 2 psi | 0.13789515 bar |
| 3 psi | 0.20684272 bar |
| 4 psi | 0.27579029 bar |
| 5 psi | 0.34473786 bar |
| 10 psi | 0.68947573 bar |
| 15 psi | 1.0342136 bar |
| 15.6 psi | 1.0755821 bar |
| 20 psi | 1.3789515 bar |
| 25 psi | 1.7236893 bar |
| 32 psi | 2.2063223 bar |
| 50 psi | 3.4473786 bar |
| 75 psi | 5.171068 bar |
| 100 psi | 6.8947573 bar |
Common mistakes
- Reading a bar value as psi, or the reverse, is a 14.5-fold error, so check the unit printed on the gauge.
- Converting does not change the reference point: a gauge reading in psi becomes a gauge reading in bar.
- 1 bar is not 1 atmosphere. A standard atmosphere is 1.01325 bar exactly, about 14.696 psi.