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Bar to PSI Converter

Convert pressure between bar and psi, with kPa, MPa, and atmospheres shown for context. Useful for tires, compressors, and tanks.

Bar to PSI Converter

Enter a non-negative pressure in bar to convert to psi.

2.2 bar equals

31.91 psi

Bar

2.2 bar

PSI

31.91 psi

Kilopascals

220 kPa

Megapascals

0.22 MPa

Atmospheres

2.1712 atm

For context: 2.2 bar is roughly a passenger-car tire at 2.2 bar (about 32 psi) cold inflation.

Tire pressure range: 1.8 to 3.5 bar (26 to 51 psi) covers most passenger-car and light-truck cold inflation values. Always follow the door-jamb placard and check pressure cold, since heat raises it by about 0.07 bar (1 psi) per 5.6 deg C of tire warming.

1 bar is exactly 100 kPa or 0.1 MPa, and approximately 14.5038 psi or 0.9869 atm. 1 psi is approximately 0.06895 bar. Mental shortcut: 1 bar is about 14.5 psi, so multiply bar by 14.5 to get psi.

Frequently Asked Questions about the Bar to PSI Converter

How do you convert bar to psi?
Multiply the bar value by approximately 14.5037738 to get psi. For example, 2.2 bar times 14.5037738 is about 31.91 psi. To go the other way, divide psi by 14.5037738 (or multiply by about 0.0689476) to get bar. The displayed factors are rounded.
Why is 1 bar equal to 14.5037738 psi?
Both units trace back to the pascal. One bar is defined as exactly 100,000 pascals. One psi is approximately 6,894.757293 pascals, and dividing the two definitions gives approximately 14.5037738 psi per bar at the shown precision.
What is a normal car tire pressure in bar and psi?
Most passenger cars call for about 2.2 to 2.5 bar, which is roughly 32 to 36 psi, though light trucks and SUVs can run up to 3.5 bar (about 51 psi). Always use the value on the door-jamb placard, not the maximum molded into the tire sidewall, and check pressure cold before driving.
What pressure does a SCUBA tank hold in bar versus psi?
An aluminum 80 cylinder fills to about 207 bar, which is 3,000 psi. High-pressure steel tanks reach 232 to 300 bar (about 3,360 to 4,350 psi). This converter shows both at once so you can read a European gauge in bar and compare it to a psi-rated fill station.
Does this converter use gauge or absolute pressure?
It converts the number you enter without adding or subtracting one atmosphere, so the unit type carries through unchanged. Tire and compressor gauges read gauge pressure, meaning pressure above local atmospheric. Absolute pressure includes the roughly 1 bar (14.7 psi) of atmosphere, so add 1 atm if you need an absolute figure.
How do bar and psi relate to kPa, MPa, and atm?
One bar equals 100 kilopascals, 0.1 megapascals, and 0.986923 atmospheres. One psi equals about 6.895 kPa. This tool lists kPa, MPa, and atm alongside the bar and psi result so you can match whatever unit a spec sheet, dive computer, or pump display uses.

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