Bar to PSI Converter
Unit ConversionConvert bar to psi. 1 bar is about 14.503774 psi, with a conversion table and the reverse conversion.
PSI
Equivalent pressure in pounds per square inch
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SponsoredThis converter turns bar into psi. Enter a value and the result updates as you type. 1 bar is about 14.503774 psi.
Bar and psi are the two pressure units most people meet on tire gauges, air compressors and pressure washers. 1 bar is exactly 100,000 pascals, a metric unit that is not part of the SI. That is about 14.5038 psi, so a quick estimate is to multiply bar by 14.5.
The result shows 0 for a negative entry. For a gauge reading below the surrounding air, use the Bar to PSIG converter listed below, which accepts vacuum readings. The result is rounded to 4 decimal places.
How to Convert Bar to PSI
To convert bar to psi, multiply by about 14.5038. For example, 2.5 bar is about 36.2594 psi.
To go from psi back to bar, divide psi by about 14.5038, or multiply by about 0.0689476.
Bar to PSI Conversion Table
Common bar values converted to psi, rounded to 4 decimal places.
| Bar | PSI |
|---|---|
| 0.5 bar | 7.2519 psi |
| 1 bar | 14.5038 psi |
| 1.5 bar | 21.7557 psi |
| 2 bar | 29.0075 psi |
| 2.2 bar | 31.9083 psi |
| 2.5 bar | 36.2594 psi |
| 2.8 bar | 40.6106 psi |
| 3 bar | 43.5113 psi |
| 5 bar | 72.5189 psi |
| 10 bar | 145.0377 psi |
| 100 bar | 1,450.3774 psi |
Bar and PSI for Tire Pressure
NHTSA advises checking tire pressure cold, before driving or after at least three hours parked, against the recommended pressure on the label on the driver's door edge or door post, or in the owner's manual. The number on the tire sidewall is the maximum pressure, not the recommended one. Tire gauges read gauge pressure, so a reading in bar converts directly to psi.
A placard value of 2.2 bar is about 31.9 psi. Tire size sets diameter and revolutions per mile, which the Tire Size Calculator works out, and engine compression is a psi reading the Compression Ratio to PSI Calculator estimates.
Frequently Asked Questions
What is 3 bar in psi?
3 bar is about 43.5113 psi.
What is 2.5 bar in psi?
2.5 bar is about 36.26 psi.
How do I convert psi to bar?
Divide psi by about 14.5038. For example, 32 psi is about 2.206 bar.
Is the Bar to PSI factor exact?
The factor is fixed by definitions, so it never changes, but it has no finite decimal form. 1 bar is about 14.503774 psi. The calculator uses the full value and rounds only the result it shows.
What happens if I enter a negative value?
It shows 0. This page treats values as pressures of zero or more. For a vacuum gauge reading below zero, use the Bar to PSIG converter in the list of related converters.
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