PSI to Bar Converter
Quickly convert pounds per square inch (PSI) to bar with precision. Enter a value and get instant results.
1 PSI (lb/in²) = 0.068948 Bar
Conversion Table
| PSI (lb/in²) | Bar |
|---|---|
| 1 psi | 0.068948 bar |
| 5 psi | 0.344738 bar |
| 10 psi | 0.689476 bar |
| 25 psi | 1.72369 bar |
| 50 psi | 3.44738 bar |
| 100 psi | 6.89476 bar |
| 500 psi | 34.4738 bar |
| 1000 psi | 68.9476 bar |
What Is PSI to Bar Conversion?
Converting PSI to bar translates the US customary pressure unit to the metric pressure unit widely used in engineering and industry. One PSI equals approximately 0.0689476 bar. PSI (pounds per square inch) is the standard pressure unit in the United States for tire pressure, hydraulic systems, and industrial applications. Bar is used in most other countries and in international engineering. This conversion is essential for automotive, industrial, and scientific applications that cross regional standards.
Conversion Formula
Bar = PSI × 0.0689476
When Do You Need This Conversion?
You need PSI to bar conversion when checking tire pressure on vehicles with metric-labeled tires, when working with industrial equipment rated in different pressure units, when interpreting American pressure specifications for international use, or when converting between pressure gauges calibrated in different units.
Frequently Asked Questions
Multiply the PSI value by 0.0689476. For example: 30 PSI × 0.0689476 = 2.07 bar. Common tire pressures: 28 PSI = 1.93 bar, 30 PSI = 2.07 bar, 32 PSI = 2.21 bar, 35 PSI = 2.41 bar, 40 PSI = 2.76 bar, 44 PSI = 3.03 bar.
Most passenger car tires require 30-35 PSI (2.07-2.41 bar). SUVs and light trucks may need 35-45 PSI (2.41-3.10 bar). Bicycle tires range from 30 PSI (2.07 bar) for mountain bikes to 80-130 PSI (5.5-9.0 bar) for road bikes. Always check the manufacturer's recommendation on the tire sidewall or door placard.
One standard atmosphere (atm) = 14.696 PSI = 1.01325 bar. One bar = 14.504 PSI ≈ 0.9869 atm. One PSI = 0.0689 bar = 0.0680 atm. These three units are all used to measure pressure but in different contexts: PSI in the US, bar in metric engineering, and atm in scientific and weather contexts.