Convert PSI (Pounds per Square Inch) to Bar.
Input the value of psi below to convert instantly to bars with standard conversions, definitions, and equations.
About converting psi to bars
PSI to bar is the pressure conversion that links American gauge readings — tire pressure, pumps, hydraulics — to the metric bar used across Europe and in most technical specs.
One bar is 14.5038 psi, so converting psi to bar means dividing by about 14.504. A 32 psi car tire is 2.21 bar, a 100 psi compressor is 6.89 bar, and a 30 psi reading is 2.07 bar.
The bar is convenient because one bar is very close to average atmospheric pressure at sea level (1 atm ≈ 1.013 bar), so a bar reading tells you roughly how many atmospheres of pressure you have. PSI, defined as pounds of force per square inch, has no such tidy relationship to atmospheric pressure.
- Quick estimate: divide psi by 14.5.
- Tire pressures: 30 psi ≈ 2.1 bar, 35 psi ≈ 2.4 bar.
How to Convert PSI to Bars
To convert psi (pounds per square inch) to bar, we use the official conversion formulas. Below is the mathematical formula, plain-English explanation, and a worked example.
PSI (Pounds per Square Inch) (psi)
US customary unit of pressure, representing pound-force applied to 1 square inch.
Bar (bar)
Metric unit of pressure defined as exactly 100,000 Pascals (approx. atmospheric pressure at sea level).
PSI (Pounds per Square Inch) to Bar Conversion Table
| PSI (Pounds per Square Inch) (psi) | Bar (bar) |
|---|---|
| 1 psi | 0.06895 bar |
| 2 psi | 0.1379 bar |
| 3 psi | 0.20684 bar |
| 5 psi | 0.34474 bar |
| 10 psi | 0.68948 bar |
| 15 psi | 1.03421 bar |
| 20 psi | 1.37895 bar |
| 25 psi | 1.72369 bar |
| 50 psi | 3.44738 bar |
| 100 psi | 6.89476 bar |
| 250 psi | 17.23689 bar |
| 500 psi | 34.47379 bar |
| 1000 psi | 68.94757 bar |
Bar to PSI (Pounds per Square Inch) Conversion Table
| Bar (bar) | PSI (Pounds per Square Inch) (psi) |
|---|---|
| 1 bar | 14.50377 psi |
| 2 bar | 29.00755 psi |
| 3 bar | 43.51132 psi |
| 5 bar | 72.51887 psi |
| 10 bar | 145.03774 psi |
| 15 bar | 217.55661 psi |
| 20 bar | 290.07548 psi |
| 25 bar | 362.59434 psi |
| 50 bar | 725.18869 psi |
| 100 bar | 1450.37738 psi |
| 250 bar | 3625.94344 psi |
| 500 bar | 7251.88689 psi |
| 1000 bar | 14503.77377 psi |