Convert Bars to PSI
Convert Bars to PSI instantly. 1 Bar (bar) equals 14.5038 PSI (psi).
Bars to PSI conversion table
| Bars (bar) | PSI (psi) |
|---|---|
| 1 bar | 14.5038 psi |
| 2 bar | 29.0075 psi |
| 3 bar | 43.5113 psi |
| 5 bar | 72.5189 psi |
| 10 bar | 145.0377 psi |
| 20 bar | 290.0755 psi |
| 50 bar | 725.1887 psi |
| 100 bar | 1,450.38 psi |
| 500 bar | 7,251.89 psi |
| 1,000 bar | 14,503.77 psi |
1 Bar = 14.5038 PSI · multiply Bars by 14.5038
About converting Bars to PSI
Bars (bar) and PSI (psi) are both units of pressure, so converting between them is a single multiplication: multiply your Bars figure by 14.5038. Ten Bars comes to 145.0377 PSI, and a hundred works out at 1,450.38 PSI.
Rule of thumb: going from Bars to PSI multiplies, so the figure always grows — one Bar is already 14.5038 PSI. If your answer came out smaller, you have the conversion the wrong way round.
What is a Bar?
The bar is not an SI unit, but it is accepted for use alongside them, and it earns that place by sheer convenience: it was chosen to sit close to average atmospheric pressure, so "one bar" reads as roughly what the air is doing right now. It dominates European industry — compressed air, hydraulics, scuba cylinders, espresso machines and tyre pressures are all quoted in bar. Its subdivision the millibar had a long career in weather forecasting before being quietly replaced by the hectopascal, which is exactly the same size, so nothing on the old charts had to change.
What is a PSI?
Pounds per square inch is the pressure unit Americans actually meet: on the gauge at the filling-station air pump, on compressors, on hydraulic equipment, and on the sidewall of every tyre sold in the country. It survives in British tyre pressures too, despite nearly everything else there having gone metric. Structurally it is exactly what the name says — a pound-force resting on a square inch — and that heritage is also its weakness, because it inherits the pound-force and with it the old confusion between pounds as weight and pounds as mass.
To put both in perspective: a scuba tank is filled to about 200 bar, while a car tyre is usually inflated to about 32 psi.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the PSI to Bars converter, or browse all Pressure converters.
Frequently asked questions
How many PSI are in one Bar?
There are 14.5038 PSI in one Bar.
How do I convert Bars to PSI?
Multiply the number of Bars by 14.5038. For example, 10 Bars = 145.0377 PSI.
What is 100 Bars in PSI?
100 Bars is equal to 1,450.38 PSI.
How do I convert PSI to Bars?
Multiply the PSI value by 0.06895 (or divide by 14.5038).
Is this Bars to PSI conversion exact?
The definition is exact — Bars and PSI are both fixed against the same base by international agreement — but the decimal shown here is rounded for readability, because the true ratio does not terminate. For engineering or scientific work, carry more decimal places than this page displays.
What is a Bar?
The bar is not an SI unit, but it is accepted for use alongside them, and it earns that place by sheer convenience: it was chosen to sit close to average atmospheric pressure, so "one bar" reads as roughly what the air is doing right now. It dominates European industry — compressed air, hydraulics, scuba cylinders, espresso machines and tyre pressures are all quoted in bar. Its subdivision the millibar had a long career in weather forecasting before being quietly replaced by the hectopascal, which is exactly the same size, so nothing on the old charts had to change.
What is a PSI?
Pounds per square inch is the pressure unit Americans actually meet: on the gauge at the filling-station air pump, on compressors, on hydraulic equipment, and on the sidewall of every tyre sold in the country. It survives in British tyre pressures too, despite nearly everything else there having gone metric. Structurally it is exactly what the name says — a pound-force resting on a square inch — and that heritage is also its weakness, because it inherits the pound-force and with it the old confusion between pounds as weight and pounds as mass.