Convert psi to bar
Convert psi to bar instantly. 1 psi = 0.068948 bar. Formula, worked examples and a quick reference table.
Last updated
One psi equals 0.068948 bars. To convert any number of psi to bars, multiply by 0.06894757.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Pressure conversions are dominated by one everyday task: inflating a tyre. The United States and the United Kingdom quote psi, most of Europe uses bar, Canada and Australia use kilopascals, and the figure on the door jamb may not match the unit on the gauge. Beyond tyres, the same conversions serve weather reporting, diving, and any engineering work where a specification and an instrument were made in different markets.
psi to bar formula
To go the other way, use psi = bar ÷ 0.06894757.
About these units
Pounds per square inch remains the standard for tyre pressure in the US and UK, while most of the world uses bar or kilopascals.
One bar is 100,000 pascals, very close to average atmospheric pressure at sea level — which is why it was chosen.
PSI is also written pounds per square inch and lb/in2. Bar is also written bars.
Sources
- National Bureau of Standards, "Refinement of Values for the Yard and the Pound", Federal Register, 1 July 1959 — the international yard as exactly 0.9144 m and the avoirdupois pound as exactly 0.45359237 kg.
- NIST Special Publication 811, Guide for the Use of the International System of Units (SI), 2008 edition — conversion factors for units outside the SI.
- Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019.
psi to bar conversion table
| PSI | Bar |
|---|---|
| 1 psi | 0.06895 bar |
| 2 psi | 0.1379 bar |
| 3 psi | 0.2068 bar |
| 5 psi | 0.3447 bar |
| 10 psi | 0.6895 bar |
| 20 psi | 1.379 bar |
| 25 psi | 1.7237 bar |
| 50 psi | 3.4474 bar |
| 100 psi | 6.8948 bar |
| 250 psi | 17.2369 bar |
| 500 psi | 34.4738 bar |
| 1,000 psi | 68.9476 bar |
Frequently asked questions
How many bars are in a psi? +
There are 0.068948 bars in one psi.
What is 10 psi in bar? +
10 psi equals 0.6895 bar. Multiply 10 by 0.06894757.
How do I convert bar back to psi? +
Use psi = bar ÷ 0.06894757. The converter above handles both directions, or see our dedicated bar to psi page.
How accurate is this psi to bar conversion? +
The factor used is 0.0689475729, carried at full double precision. Where a unit has an exact legal definition the factor is exact rather than approximate. Rounding is applied only to the displayed result, so the answer is never a calculation done on an already-rounded number.
Is there a quick way to estimate psi to bar in my head? +
Divide by 14.5. That reproduces the exact factor of 0.068948 to the precision you could read off a result anyway.