PSI to Bar
Convert pound/inch² to bar instantly — type a value and read the result, with the exact formula shown.
Example
1 psi = 0.06894757 bar, 5 psi = 0.3447379 bar, 10 psi = 0.6894757 bar.
How it works
Bar = Pound/inch² × 0.06894757. 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
PSI-to-bar conversion shows up constantly in the gap between American and European equipment. If you check tire pressure, run an air compressor, dive with a regulator, or read a hydraulic spec sheet, one device often talks in psi while the other talks in bar. A US-spec tire placard might call for 35 psi, while the European gauge at the pump reads bar — so you need to know that 35 psi is roughly 2.41 bar before you start inflating.
The two units come from different traditions. PSI (pound-force per square inch) is an imperial/US-customary unit tied to a pound of force pressing on a square inch. Bar is a metric-adjacent unit defined as exactly 100,000 pascals, deliberately set close to average atmospheric pressure at sea level (which is about 1.013 bar) so that "1 bar" is an easy mental anchor for everyday pressure.
For quick mental math, lean on the reverse relationship: 1 bar is about 14.5 psi, so to go from psi to bar you divide by roughly 14.5 (or multiply by about 0.069). A handy shortcut is "psi divided by 14.5, near enough by 15" — 30 psi lands around 2.07 bar, 60 psi around 4.14 bar. For precision work, use the full factor 0.06894757.
The most common mistakes are mixing up gauge versus absolute pressure and confusing bar with "psi over 14.7." Most tire and tank gauges read gauge pressure (pressure above the surrounding air), and the 0.06894757 factor converts that reading directly — you only add atmospheric pressure if you specifically need absolute (bara) values. Also avoid the lazy "divide by 15" for anything safety-critical like scuba tanks or hydraulics, where the small error can add up at high pressures.
Frequently asked questions
How do you convert pound/inch² to bar?
Multiply the number of pound/inch²s by 0.06894757 to get bars. For example, 1 psi = 0.06894757 bar.
What is 1 pound/inch² in bars?
1 pound/inch² equals 0.06894757 bars (1 psi = 0.06894757 bar).
How many pound/inch²s are in 1 bar?
There are 14.50377 pound/inch²s in 1 bar.
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
What is 35 psi in bar?
35 psi equals about 2.41 bar (35 × 0.06894757 = 2.4132 bar). This is a typical passenger-car tire pressure.
Is 2 bar the same as 30 psi?
Not exactly — 2 bar is about 29.0 psi (2 × 14.50377), and 30 psi is about 2.07 bar. They are close, which is why people round them together, but 2 bar is slightly under 30 psi.
How many psi is 1 bar?
1 bar equals 14.50377 psi. So whenever you see a pressure in bar, multiplying by roughly 14.5 gives you the psi value.
How do I convert psi to bar quickly in my head?
Divide the psi value by about 14.5 (or multiply by 0.069). For example, 100 psi ÷ 14.5 ≈ 6.9 bar.
What is the exact formula for psi to bar?
Multiply psi by 0.06894757 to get bar. This factor comes from the international definitions of the pound-force, the inch, and the bar (1 bar = 100,000 pascals).
What is car tire pressure of 32 psi in bar?
32 psi is about 2.21 bar (32 × 0.06894757 = 2.2063 bar). Many European tire gauges and recommendations are given in bar, so this conversion is useful at the pump.
Does psi to bar use gauge or absolute pressure?
The 0.06894757 factor converts the numbers directly regardless of reference, so gauge psi becomes gauge bar and absolute psi becomes absolute bar. You only adjust by about 1 bar (14.7 psi) if you need to switch between gauge and absolute readings.
What is 100 psi in bar?
100 psi equals about 6.89 bar (100 × 0.06894757 = 6.8948 bar). This is a common range for air compressors and pneumatic tools.
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