How to convert pounds per square inch to bar
One pound per square inch equals 0.068948 bar, so multiply the number of pounds per square inch by 0.068948:
bar = psi × 0.068948
psi = bar ÷ 0.068948 (1 bar = 14.5038 psi)
Example: 30 psi → 30 × 0.068948 = 2.0684 bar.
Going the other way, divide by 0.068948, or multiply by 14.5038; the bar to pounds per square inch converter does it for you.
Everyday values
| Pounds per square inch | Bar | For example |
|---|---|---|
| 30 psi | 2.0684 bar | a typical car tyre |
| 32 psi | 2.2063 bar | a common car tyre recommendation |
| 35 psi | 2.4132 bar | a loaded car tyre |
| 40 psi | 2.7579 bar | a scooter or light truck tyre |
| 80 psi | 5.5158 bar | a road bike tyre, low end |
| 100 psi | 6.8948 bar | a road bike tyre |
| 14.7 psi | 1.0135 bar | atmospheric pressure at sea level |
When you need this conversion
Tyre pressure is the most common reason to convert psi to bar. The recommended pressures on the door frame or in the manual are often printed in both. A car tyre at 32 psi is 2.2 bar. Always set pressures with cold tyres, before driving.
Pound per square inch to bar conversion table
| psi | bar | psi | bar |
|---|---|---|---|
| 5 psi | 0.344738 bar | 55 psi | 3.7921 bar |
| 10 psi | 0.689476 bar | 60 psi | 4.1369 bar |
| 15 psi | 1.0342 bar | 65 psi | 4.4816 bar |
| 20 psi | 1.379 bar | 70 psi | 4.8263 bar |
| 25 psi | 1.7237 bar | 75 psi | 5.1711 bar |
| 30 psi | 2.0684 bar | 80 psi | 5.5158 bar |
| 35 psi | 2.4132 bar | 85 psi | 5.8605 bar |
| 40 psi | 2.7579 bar | 90 psi | 6.2053 bar |
| 45 psi | 3.1026 bar | 95 psi | 6.55 bar |
| 50 psi | 3.4474 bar | 100 psi | 6.8948 bar |
About the units
- Pound per square inch (psi): one pound-force on one square inch, about 6,894.76 Pa.
- Bar (bar): exactly 100,000 pascals, close to atmospheric pressure at sea level.
Both are units of pressure. The conversion factor comes from the exact definitions above, so the calculator is exact; results are only rounded for display (up to six significant digits).
Frequently asked questions
How many bar are in one pound per square inch?
One pound per square inch is 0.068948 bar. One bar is 14.5038 pounds per square inch.
How do I convert pounds per square inch to bar?
Multiply the value in pounds per square inch by 0.068948. To go back, divide by 0.068948.
What is 30 psi in bar?
30 psi = 2.0684 bar.
What is 32 psi in bar?
32 psi = 2.2063 bar.
Sources
- NIST Special Publication 811 (2008), Guide for the Use of the International System of Units (SI), Appendix B: conversion factors.
- NIST Handbook 44 (2024), Appendix C: General tables of units of measurement.
Last reviewed 5 October 2026. Results are estimates; see our disclaimer.