Bars to PSI (bar to psi)
1 bar equals 14.50377377 pounds per square inch (rounded).
How to convert bars to pounds per square inch
To convert bars to pounds per square inch, multiply the number of bars by 14.50377377. The factor is rounded to 10 significant digits. To go the other way, multiply pounds per square inch by 0.06894757293 (rounded).
pounds per square inch = bars × 14.50377377
Example: 10 bars = 145.0377377 pounds per square inch.
About these units
Bar (bar)
Exactly 100,000 pascals, close to atmospheric pressure at sea level. Used for tire pressure, diving and industrial gauges.
Bar began as a name that meant different things to different people. It comes from the Ancient Greek baros, weight, and from 1793 to 1795 an early metric system used bar for a unit of mass equal to the modern tonne. The pressure bar was introduced by the Norwegian meteorologist Vilhelm Bjerknes, a founder of modern weather forecasting, who defined it as one megadyne per square centimeter. Some earlier writers had used bar for one dyne per square centimeter, a source of confusion.
The bar is a metric unit but not part of the SI, and its official symbol is simply bar, since the old b clashes with the barn and the bit. It has been legally recognized in EU countries since 2004, although NIST deprecates it except for limited use in meteorology.
Its size is handy because 1 bar is slightly less than average sea-level pressure, which is about 1.013 bar. In scuba diving every 10 meters of seawater adds about 1 bar and a full standard tank holds about 200 bar. Tire pressure and turbocharger boost are often quoted in bar outside the US.
1 bar = 100,000 pascals (exactly).
Sources: Wikipedia: Bar (unit); Wikipedia: Atmospheric pressure
Pound Per Square Inch (psi)
About 6,894.757 pascals. The common unit for tire pressure, hydraulics and gas pipelines in the US.
Unlike most pressure units, psi has no namesake: it simply spells out its own definition, one pound-force acting on one square inch, and it is based on avoirdupois units. Used mainly in the United States, it is about 6.895 kilopascals.
The letters after the unit matter. Psia is measured against a vacuum, while psig is measured against the surrounding air, so at sea level, where the atmosphere is about 14.7 psi, you add that amount to a gauge reading to get an absolute one. A bicycle tire at 65 psig is therefore at 79.7 psia, and the label psid means a difference between two pressures rather than a reference to ambient air.
Typical automobile tires are listed at about 32 psig, and road racing bicycle tires at about 120 psig. One standard atmosphere is 14.696 psi, which gives a feel for how many multiples of sea-level air those tire pressures represent.
1 pound per square inch = 6,894.757293 pascals (approximately).
Sources: Wikipedia: Pounds per square inch; Wikipedia: Standard atmosphere (unit)
Related conversions
- PSI to bars (reverse)
- Bars to pascals
- Bars to kilopascals
- Bars to standard atmospheres
- Bars to hectopascals
- Bars to megapascals
- Bars to millibars
- Bars to torr
- Bars to millimeters of mercury
- Bars to inches of mercury
- Bars to gigapascals
- Bars to kilopounds per square inch
- Bars to millimeters of water
- Pascals to PSI
- Kilopascals to PSI
- Standard atmospheres to PSI
- Hectopascals to PSI
- Megapascals to PSI
- Millibars to PSI
- Torr to PSI
- Millimeters of mercury to PSI
- Inches of mercury to PSI
- Gigapascals to PSI
- Kilopounds per square inch to PSI
- Millimeters of water to PSI
See all pressure units.