1 psi = 0.0689476 bar
1 pound per square inch equals 0.0689476 bars. To convert pounds per square inch to bars, multiply the pound per square inch value by 0.0689476. For quick reference: 1 psi = 0.0689476 bar, 5 psi = 0.344738 bar, 10 psi = 0.689476 bar, 100 psi = 6.89476 bar.
Bars = Pounds per square inch × 0.0689476Start with your value in pounds per square inch.
Multiply the pound per square inch value by 0.0689476. This is the exact conversion factor from pounds per square inch to bars.
The product is your value in bars. For example, 5 psi × 0.0689476 = 0.344738 bar.
The exact factor from pounds per square inch to bars is 0.0689476.
Bars = Pounds per square inch × 0.0689476
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Pounds per square inch (psi) | Bars (bar) |
|---|---|
| 0.001 psi | 6.8948 × 10^−5 bar |
| 0.01 psi | 0.00068948 bar |
| 0.1 psi | 0.0068948 bar |
| 0.5 psi | 0.034474 bar |
| 1 psi | 0.068948 bar |
| 1.5 psi | 0.10342 bar |
| 2 psi | 0.1379 bar |
| 2.5 psi | 0.17237 bar |
| 3 psi | 0.20684 bar |
| 4 psi | 0.27579 bar |
| 5 psi | 0.34474 bar |
| 6 psi | 0.41369 bar |
| 7 psi | 0.48263 bar |
| 8 psi | 0.55158 bar |
| 9 psi | 0.62053 bar |
| 10 psi | 0.68948 bar |
| 14 psi | 0.96527 bar |
| 15 psi | 1.0342 bar |
| 20 psi | 1.379 bar |
| 25 psi | 1.7237 bar |
| 30 psi | 2.0684 bar |
| 32 psi | 2.2063 bar |
| 35 psi | 2.4132 bar |
| 40 psi | 2.7579 bar |
| 50 psi | 3.4474 bar |
| 60 psi | 4.1369 bar |
| 75 psi | 5.1711 bar |
| 80 psi | 5.5158 bar |
| 100 psi | 6.8948 bar |
| 101.325 psi | 6.9861 bar |
| 150 psi | 10.342 bar |
| 200 psi | 13.79 bar |
| 250 psi | 17.237 bar |
| 300 psi | 20.684 bar |
| 400 psi | 27.579 bar |
| 500 psi | 34.474 bar |
| 760 psi | 52.4 bar |
| 1000 psi | 68.948 bar |
| 1013.25 psi | 69.861 bar |
| 2000 psi | 137.9 bar |
| 5000 psi | 344.74 bar |
| 10000 psi | 689.48 bar |
| 14.7 psi | 1.0135 bar |
| 50000 psi | 3447.4 bar |
| 100000 psi | 6894.8 bar |
| 101325 psi | 6986.1 bar |
| 200000 psi | 13790 bar |
| 500000 psi | 34474 bar |
| 1000000 psi | 68948 bar |
| 10000000 psi | 689476 bar |
Most US passenger-car tires call for 32–35 psi. A typical bicycle tire runs 50–80 psi. In bars, that gives you: 1 psi = 0.0689476 bar, 10 psi = 0.689476 bar, 100 psi = 6.89476 bar.
The pound per square inch (psi) is the customary US pressure unit, derived from the avoirdupois pound-force on a square inch (≈ 6,894.76 Pa exactly). It is the standard unit on US car tire-pressure stickers, scuba gauges in the US, and most plumbing specifications.
The bar equals exactly 100,000 pascals — close to but not equal to standard atmospheric pressure (1 atm = 1.01325 bar). It is the working unit for compressed-air systems, pneumatic tools, dive computers, and weather pressure outside North America.