Bar to PSI
Convert bar to pound/inch² instantly — type a value and read the result, with the exact formula shown.
Example
1 bar = 14.50377 psi, 5 bar = 72.51887 psi, 10 bar = 145.0377 psi.
How it works
Pound/inch² = Bar × 14.50377. Every value is converted through a single pascal base unit using internationally defined conversion factors, so any from/to pair stays consistent.
Good to know
Converting bar to PSI is something you do almost any time you cross between European-spec and American-spec equipment. Tire placards, dive cylinders, espresso machines, hydraulic rigs, and pressure washers are often rated in one unit while your gauge reads the other, so the conversion turns a foreign-looking number into one you can actually act on. A road bike pumped to 6.9 bar is the same as 100 psi, and a car tire at 2.2 bar is roughly 32 psi.
The two units come from different worlds. The bar is a metric unit (1 bar = 100,000 pascals), built to sit conveniently close to average atmospheric pressure at sea level, which is about 1.013 bar. PSI is imperial, defined as one pound-force pressing on one square inch, and it remains the default on gauges, compressors, and tire equipment across the United States. Neither is an official SI unit, but both are tolerated for everyday work alongside the pascal.
For a quick mental estimate, multiply bar by 14.5 (the exact factor is 14.50377). An even faster rule of thumb: 1 bar is about 14.5 psi, and 0.1 bar is roughly 1.45 psi, so each 0.1 bar bump on a tire is about a pound and a half of PSI. Doubling and adding a tenth (×2, then add ~45%) also lands you close enough for tire-pressure decisions.
The most common mistake is confusing gauge pressure with absolute pressure. A tire gauge reads gauge pressure (pressure above the surrounding air), and the bar-to-PSI factor applies cleanly to both — but if you mix a "bar absolute" figure from a spec sheet with a "psi gauge" reading, you can be off by roughly 14.7 psi, the value of one atmosphere. Also watch the false friend "barg" versus "bara," and remember that displayed results are rounded, so 1 bar shown as 14.5 psi is really 14.50377.
Frequently asked questions
How do you convert bar to pound/inch²?
Multiply the number of bars by 14.50377 to get pound/inch²s. For example, 1 bar = 14.50377 psi.
What is 1 bar in pound/inch²s?
1 bar equals 14.50377 pound/inch²s (1 bar = 14.50377 psi).
How many bars are in 1 pound/inch²?
There are 0.06894757 bars in 1 pound/inch².
Is this converter free and private?
Yes. It runs entirely in your browser, so your inputs never leave your device, there is no sign-up, and it works offline once loaded.
Are the conversions exact?
Conversions use internationally defined factors and are exact where the definitions are exact (for example, 1 inch = 2.54 cm). Displayed results are rounded for readability.
People also ask
How many PSI is 1 bar?
1 bar equals 14.50377 psi. For everyday work you can round it to 14.5 psi.
What is 2 bar in PSI?
2 bar is about 29.01 psi (2 × 14.50377). That is a typical pressure for a car tire.
How do I convert bar to PSI without a calculator?
Multiply the bar value by 14.5. So 3 bar is roughly 43.5 psi and 8 bar is about 116 psi.
Is bar higher or lower pressure than PSI?
Bar is the larger unit: 1 bar equals about 14.5 psi, so any bar figure represents far more pressure than the same number of psi.
What tire pressure is 2.5 bar in PSI?
2.5 bar is about 36.26 psi. That sits in the normal range for many passenger cars and SUVs.
Is 1 bar the same as atmospheric pressure?
Not exactly. Standard atmospheric pressure at sea level is about 1.013 bar (roughly 14.7 psi), so 1 bar is just slightly below one atmosphere.
How many bar is 100 PSI?
100 psi equals about 6.895 bar (100 × 0.06894757). This is a common road-bike and air-compressor pressure.
Why are bar and PSI both used for pressure?
Bar is the metric unit common in Europe and on technical specs, while psi is the imperial unit standard on US gauges and tire equipment, so both appear depending on where the gear was made.
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