Tyre pressures on European cars and bikes are given in bar; U.S. pumps read psi. One bar is about 14.504 psi.
How to use the Bar to PSI Converter
- Type the number of bar into the Bar field. Decimals such as 1.1 are fine.
- Read the answer in Psi – it updates as you type, with no button to press.
- To convert the other way, type into Psi and the bar are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only bar ⇄ psi. Need a different unit? Use the general pressure converter, where you can choose any “from” and “to” unit.
How it works
Both units measure pressure, so they are always in the same ratio: one bar equals 14.503774 psi. The calculator multiplies the number of bar you type by 14.503774 to give psi, and when you type into the psi field it divides by the same factor to give bar. Because the ratio never changes, doubling the bar always doubles the psi. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
How to convert bar to psi
- Write down the value in bar, for example 2.2 bar.
- Multiply by the conversion factor 14.503774 (because 1 bar = 14.503774 psi).
- 2.2 × 14.503774 = 31.908302 psi.
- To go back from psi to bar, divide by 14.503774 – or multiply by 0.068947573.
bar to psi conversion table
| Bar | Psi | Psi | Bar |
|---|---|---|---|
| 0.5 bar | 7.2518869 psi | 1 psi | 0.068947573 bar |
| 1 bar | 14.503774 psi | 2 psi | 0.13789515 bar |
| 1.5 bar | 21.755661 psi | 5 psi | 0.34473786 bar |
| 2.2 bar | 31.908302 psi | 10 psi | 0.68947573 bar |
| 2.5 bar | 36.259434 psi | 20 psi | 1.3789515 bar |
| 3 bar | 43.511321 psi | 50 psi | 3.4473786 bar |
| 4 bar | 58.015095 psi | 100 psi | 6.8947573 bar |
| 6 bar | 87.022643 psi | 1,000 psi | 68.947573 bar |
| 8 bar | 116.03019 psi | ||
| 100 bar | 1,450.3774 psi | ||
| 200 bar | 2,900.7548 psi | ||
| 300 bar | 4,351.1321 psi |
What is a bar?
One bar is exactly 100,000 Pa, close to average atmospheric pressure. European tyre pressures, diving, espresso machines and industrial gauges use bar.
What is a pound per square inch?
Pounds per square inch is the pressure of one pound-force on one square inch, about 6,895 Pa. U.S. tyre gauges, compressors and hydraulic equipment read psi.
Quick mental conversion
For a fast estimate, multiply bar by about 15 to get psi; the error is about 3.4%. Use the calculator above when you need the exact figure.
Common mistakes to avoid
Mixing gauge pressure (psig, barg) with absolute pressure (psia, bara), treating bar and atm as identical, and confusing kgf/cm² with bar.
Formula
1 bar = 14.503774 psi1 psi = 0.068947573 barpsi = bar × 14.503774Worked example
Inputs — Bar: 2.2 bar.
Results — Psi = 31.9083023 psi.
Frequently asked questions
How many psi is 2.2 bar?
About 31.9 psi.
How many bar is 35 psi?
About 2.41 bar.
How do I convert bar to psi?
Multiply the number of bar by 14.503774. For example, 2.2 bar × 14.503774 = 31.908302 psi.
How do I convert psi back to bar?
Divide by 14.503774 (or multiply by 0.068947573), or simply type the value into the psi field above.
What is 10 bar in psi?
10 bar = 145.03774 psi.
What is 100 bar in psi?
100 bar = 1,450.3774 psi.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between bar and psi. To pick any pressure unit, use the general pressure converter linked under Related calculators.
What formula does the Bar to PSI Converter use?
1 bar = 14.503774 psi.