Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Convert PSI to Bar instantly with an exact, accurate formula -- no sign-up, no ads blocking the result.
This tool converts a pressure measurement in PSI into its exact equivalent in Bar, using the fixed factor 0.06894757. Pressure units show up constantly in tire inflation, HVAC/plumbing specs, weather reports, and industrial equipment -- PSI dominates US tire gauges and pressure specs, while bar and kPa are the metric standards used in most of the rest of the world and in scientific/engineering contexts. One psi (pound-force per square inch) equals about 6,894.76 pascals, or roughly 0.0689476 bar. One bar equals exactly 100,000 pascals, close to average sea-level atmospheric pressure (1.01325 bar).
Enter your value and confirm the "From Unit" dropdown is set to PSI -- the result grid updates instantly, showing your value converted into every unit in this pressure category at once (not just Bar), so you can see multiple equivalent measurements without switching tools. There's no button to press and nothing is sent to a server, so it works the same on a phone with no signal as it does on a desktop.
Bar = PSI × 0.06894757
PSI (pounds per square inch) is a US customary pressure unit; bar and kPa (kilopascals) are metric, with the pascal defined as one newton of force per square meter -- these unit systems don't share a common simple-fraction relationship the way length units do, so the conversion factors (like 1 PSI = 0.0689475729 bar) are precise but not round numbers.
| PSI | Bar |
|---|---|
| 1 | 0.06894757 |
| 5 | 0.34473786 |
| 10 | 0.68947573 |
| 50 | 3.44737865 |
| 100 | 6.89475729 |
Checking or converting a tire pressure spec between PSI and bar/kPa, especially for imported vehicles or equipment. HVAC and plumbing work that mixes US and metric pressure specifications. Reading a weather report or scientific instrument that uses a different pressure unit than you're used to. For related conversions, see PSI to kPa Converter.
This calculator carries full precision internally and only rounds the final displayed result for readability -- if you need more or fewer decimal places than shown, the underlying value is still exact to the limits of floating-point arithmetic.
Multiply the PSI value by 0.06894757 to get Bar. This calculator does that automatically as you type, so you don't need to do the multiplication by hand.
Yes -- 1 PSI equals 0.06894757 Bar by definition, so the result is mathematically exact rather than a rounded estimate (the displayed value may be rounded for readability, but the underlying calculation isn't).
Yes -- change the "From Unit" dropdown above the input to switch direction. The same conversion engine handles every unit in this category, not just PSI and Bar.
Most passenger car tires run around 30-35 PSI, which is roughly 2.1-2.4 bar or 207-241 kPa -- always use your specific vehicle's manufacturer-recommended pressure (found on the door jamb sticker or owner's manual) rather than a general estimate.
Bar is one of the standard units for measuring pressure -- see the Practical Uses section above for the specific contexts where it's most commonly encountered.
100 psi equals 6.894757 bar, using the same 0.06894757 factor as the rest of this page.
To convert psi to bar, multiply by 0.06894757. To go the other way, divide by 0.06894757 (or multiply bar by 14.50377). For example, 12.5 psi × 0.06894757 = 0.8618447 bar, and 7 psi × 0.06894757 = 0.482633 bar.
One psi (pound-force per square inch) equals about 6,894.76 pascals, or roughly 0.0689476 bar. One bar equals exactly 100,000 pascals, close to average sea-level atmospheric pressure (1.01325 bar).
| PSI | Bar |
|---|---|
| 1 | 0.06894757 |
| 2 | 0.1378951 |
| 3 | 0.2068427 |
| 5 | 0.3447379 |
| 10 | 0.6894757 |
| 15 | 1.034214 |
| 20 | 1.378951 |
| 25 | 1.723689 |
| 50 | 3.447379 |
| 75 | 5.171068 |
| 100 | 6.894757 |
| 250 | 17.23689 |
| 500 | 34.47379 |
| 1,000 | 68.94757 |
How many bar are in 1 psi?
1 psi equals 0.06894757 bar.
How many psi are in 1 bar?
1 bar equals 14.50377 psi.
What is 3.5 psi in bar?
3.5 psi equals 0.2413165 bar, using the same 0.06894757 factor as the rest of this chart.
Is this conversion exact or approximate?
The 0.06894757 factor comes from a fixed, exact definitional constant, so the underlying math is exact; the numbers on this page are rounded to seven significant digits for readability, and the calculator above keeps the full-precision value.
Values are rounded to seven significant digits for display; the converter above uses the full-precision factor.
Reference: NIST Weights and Measures