UnitSnapPounds per Square Inch to Bar
1 psi = 0.06894757 bar
Tire placards, air compressors, and pressure washers sold in the United States are marked in psi, while European equipment, scuba gear, and many gauges use bar. Converting psi to bar lets drivers, cyclists, and technicians read a metric gauge correctly or match specifications from manufacturers that publish only in bar.
When you need to convert pounds per square inch to bar
- Setting car tire pressure with a metric gauge at a European gas station
- Matching a US compressor rating against a fitting rated in bar
- Reading road bike tire recommendations printed in psi on a metric pump
- Comparing pressure washer output ratings across brands
How to convert pounds per square inch to bar
bar = psi × 0.06894757
Example: 5 psi = 0.3447379 bar
Common tire and equipment pressures
| Pounds per Square Inch (psi) | Bar (bar) |
|---|---|
| 28 psi | 1.930532 bar |
| 30 psi | 2.068427 bar |
| 32 psi | 2.206322 bar |
| 35 psi | 2.413165 bar |
| 40 psi | 2.757903 bar |
| 60 psi | 4.136854 bar |
| 80 psi | 5.515806 bar |
| 100 psi | 6.894757 bar |
| 120 psi | 8.273709 bar |
Tips for converting pounds per square inch to bar
- For mental math, divide psi by roughly 14.5 to get bar. Dividing by 15 is quicker but reads about 3% low.
- Tire pressure in psi is gauge pressure, above atmospheric. Bar figures on tire gauges are also gauge pressure, so no extra adjustment is needed.
- One bar is exactly 100 kPa, which is close to, but slightly less than, standard atmospheric pressure.
Pounds per Square Inch to Bar conversion table
| Pounds per Square Inch (psi) | Bar (bar) |
|---|---|
| 1 psi | 0.06894757 bar |
| 2 psi | 0.1378951 bar |
| 3 psi | 0.2068427 bar |
| 4 psi | 0.2757903 bar |
| 5 psi | 0.3447379 bar |
| 6 psi | 0.4136854 bar |
| 7 psi | 0.482633 bar |
| 8 psi | 0.5515806 bar |
| 9 psi | 0.6205282 bar |
| 10 psi | 0.6894757 bar |
| 15 psi | 1.034214 bar |
| 20 psi | 1.378951 bar |
| 25 psi | 1.723689 bar |
| 30 psi | 2.068427 bar |
| 40 psi | 2.757903 bar |
| 50 psi | 3.447379 bar |
| 75 psi | 5.171068 bar |
| 100 psi | 6.894757 bar |
| 250 psi | 17.23689 bar |
| 500 psi | 34.47379 bar |
| 1,000 psi | 68.94757 bar |
About the units
Pounds per Square Inch: Pounds per square inch (psi) is a US customary unit of pressure, used for tire pressure, hydraulics and compressed air.
Bar: The bar is a metric unit of pressure equal to exactly 100,000 pascals, close to atmospheric pressure at sea level.
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Frequently asked questions
How many bar are in 1 pound per square inch?
1 pound per square inch equals 0.06894757 bar.
How many pounds per square inch are in 1 bar?
1 bar equals 14.50377 pounds per square inch.
How do I convert pounds per square inch to bar?
Use the formula bar = psi × 0.06894757.
What is 10 pounds per square inch in bar?
10 pounds per square inch equals 0.6894757 bar.
Related conversions
- Bar to Pounds per Square Inch
- Pounds per Square Inch to Kilopascals
- Kilopascals to Pounds per Square Inch
- Bar to Kilopascals
- Kilopascals to Bar
- Bar to Standard Atmospheres
- Standard Atmospheres to Bar
- Standard Atmospheres to Pounds per Square Inch
- Pounds per Square Inch to Standard Atmospheres
- Millimeters of Mercury to Kilopascals
- Kilopascals to Millimeters of Mercury
- Kilograms-Force per Square Centimeter to Pounds per Square Inch
- Pounds per Square Inch to Kilograms-Force per Square Centimeter
- All pressure units
Factors: NIST SP 811 · SI Brochure · NIST Handbook 44 — Updated