Unit converter

Bar to PSI.

Convert bar to psi and psi to bar. Type in either box and the other follows. One bar is 14.5038 psi, so the round 2 bar on a European placard is about 29 psi.

From

bar → psiExact definition

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Display precision

Bars to pounds per square inch — common values, to 6 significant figures.
bar	psi
0.5 bar	7.25189 psi
1 bar	14.5038 psi
1.5 bar	21.7557 psi
2 bar	29.0075 psi
2.2 bar	31.9083 psi
2.4 bar	34.8091 psi
2.6 bar	37.7098 psi
2.8 bar	40.6106 psi
3 bar	43.5113 psi
4 bar	58.0151 psi
5 bar	72.5189 psi
10 bar	145.038 psi

1 bar = 14.50377377 psi

1 psi = 0.06894757293 bar

Conversion goes through Pa in both directions, so neither figure is rounded on the way.

Definitions

The bar is exactly 100 000 Pa, near enough to atmospheric pressure at sea level to be a convenient working unit.
The pound per square inch is exactly 6894.757 293 Pa. UK and US tyre gauges are still marked in it.
This conversion is exact by definition. 1 bar = 14.50377377 psi.
Pressure is converted through Pa.

How it works

One direction multiplies and the other divides by the same number, so nothing is lost by going back and forth.

The value passes through Pa, the unit every other pressure unit on the site is defined against, rather than a number written into this page on its own. That is why the figure here, the figure in the table above and the general pressure converter always agree.

Display precision sets a maximum number of significant figures and trims trailing zeroes, so it changes what you see and never what was calculated. The editable box always holds a plain number at full working precision, so you can carry on from either side.

Common questions this answers: how many pounds per square inch in a bar (14.5038), how many bars in a pound per square inch (0.0689476), and what 2.2 bar is in pounds per square inch (31.9083 psi).

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