Bar to PSI Converter
Quickly convert bar to pounds per square inch (PSI) with precision. Enter a value and get instant results.
1 Bar = 14.503768 PSI (lb/in²)
Conversion Table
| Bar | PSI (lb/in²) |
|---|---|
| 1 bar | 14.503768 psi |
| 5 bar | 72.51884 psi |
| 10 bar | 145.037681 psi |
| 25 bar | 362.594202 psi |
| 50 bar | 725.188404 psi |
| 100 bar | 1450.376808 psi |
| 500 bar | 7251.884039 psi |
| 1000 bar | 14503.768079 psi |
What Is Bar to PSI Conversion?
Converting bar to PSI translates the metric pressure unit to the US customary unit. One bar equals approximately 14.5038 PSI. Bar is the standard pressure unit in most of the world for tire pressure, industrial systems, and weather reporting, while PSI is dominant in the United States. This conversion is critical for automotive maintenance, industrial equipment operation, and any application where pressure specifications cross regional measurement systems.
Conversion Formula
PSI = Bar × 14.5038
Conversion Table
| bar | psi |
|---|---|
| 1 | 14.503768 |
| 5 | 72.51884 |
| 10 | 145.037681 |
| 25 | 362.594202 |
| 50 | 725.188404 |
| 100 | 1450.376808 |
| 250 | 3625.94202 |
| 500 | 7251.884039 |
| 1000 | 14503.768079 |
Practical Examples
A European tire gauge reading 2.5 bar converts to approximately 36.3 psi, the standard US tire pressure unit. An espresso machine operating at 9 bar produces about 130.5 psi of pressure — an impressive force that extracts flavor from coffee grounds. If a fire extinguisher is rated at 15 bar, that equals roughly 217.6 psi, the unit used on American safety certifications. A scuba tank at 200 bar contains about 2,901 psi of pressure, the measurement US dive shops display on their equipment gauges.
When Do You Need This Conversion?
You need bar to PSI conversion when inflating tires at a US gas station with a bar-rated recommendation, when converting European equipment specifications for US installations, when interpreting international pressure data in PSI, or when communicating pressure readings between metric and US systems.
Related Conversions
Frequently Asked Questions
One bar equals approximately 14.5038 PSI. Quick reference: 0.5 bar = 7.25 PSI, 1 bar = 14.50 PSI, 1.5 bar = 21.76 PSI, 2 bar = 29.01 PSI, 2.5 bar = 36.26 PSI, 3 bar = 43.51 PSI, 5 bar = 72.52 PSI, 10 bar = 145.04 PSI.
Very close. 2.5 bar × 14.5038 = 36.26 PSI, which rounds to approximately 36 PSI. For tire pressure, this level of precision is sufficient. Tire pressure gauges typically have a precision of ±1 PSI or ±0.1 bar, so 2.5 bar and 36 PSI are effectively equivalent for practical purposes.
One bar equals 1,000 millibars (mbar). Millibars are commonly used in meteorology for atmospheric pressure (standard atmospheric pressure is approximately 1,013.25 mbar or 1.01325 bar). In weather reports, you may also see hectopascals (hPa), which are numerically identical to millibars: 1 mbar = 1 hPa.