Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. You can find metric conversion tables for SI units, as well as English units, currency, and other data. bar - psi conversion table psi bar psi bar psi bar psi bar psi bar psi bar. Its official symbol is "bar" the earlier "b" is now deprecated, but still often seen especially as "mb" rather than the proper "mbar" for millibars.Ĭ provides an online conversion calculator for all types of measurement units. The word bar is of Greek origin, báros meaning weight. ![]() The bar is a measurement unit of pressure, equal to 1,000,000 dynes per square centimetre (baryes), or 100,000 newtons per square metre (pascals). It is the pressure resulting from a force of one pound-force applied to an area of one square inch. The pound per square inch or, more accurately, pound-force per square inch (symbol: psi or lbf/in² or lbf/in²) is a unit of pressure or of stress based on avoirdupois units. Never inflate to less than the MIN pressure. psi to kilogram-force/square millimeter psi (4.8 bar) for 23C & 25C tires, 50 psi (3.4 bar) for 28C tires and 45 psi (3.1 bar) for 32C tires.Meteorologists and weather reporters worldwide often use this unit for convenience, since working in pascals would result in much larger values.ġ5 psi = 15 × 0.0689475729 bar = 1.You can do the reverse unit conversion fromīars to psi, or enter any two units below: Enter two units to convert From: Millibars (symbol: mb) are also commonly used when referencing atmospheric air pressure, where atmospheric pressure equals 1013.25 mbar (101.325 kPa). ![]() The International Bureau of Weights and Measures has specified the bar as a unit that authors should have the freedom to use but has chosen not to include the bar in the list of non-SI units accepted for use with SI. The term "bar" comes from the Greek word "baros," which means weight.Ĭurrent use: Although the bar is a metric unit of pressure, it is not accepted within the International System of Units (SI) and is even deprecated within certain fields. History/origin: The unit, bar, was introduced by Vilhelm Bjerknes, a Norwegian meteorologist who founded modern weather forecasting. For example, to convert 1 bar to psi, you would multiply by 14.5038. It is equal to 0.987 atmospheres (101,325 Pa), the unit often used as a reference of standard pressure. Barĭefinition: A bar (symbol: bar) is a metric unit of pressure that is defined as exactly 100,000 pascals (symbol: Pa). Steel Pipes Schedule 40 - Pressure Loss Water flow and pressure loss in schedule 40 steel pipes - Imperial and SI units - gallons per minute, liters per second and cubic meters per hour. ![]() Although the pascal is more widely used in scientific contexts, psi is more often used in everyday contexts, particularly in countries like the United States as well as others under the US customary or imperial systems of units. Converting head (ft or m) to pressure (psi or bar, kg/cm2) and vice versa. As such, the prototype pound at the time was known as the avoirdupois wool pound.Ĭurrent use: The psi is fairly widely used to measure numerous pressures, such as tire pressure, scuba tank pressure, natural gas pipeline pressure, among others. The system is believed to have come into use in England around 1300 and was used in the international wool trade. The equation bar psi / 14.5038 can be used to convert between psi and bar. For example, you may use the calculation psi bar x 14.5038 to convert bar to psi. It is based on the avoirdupois system, a system that uses weights in terms of the avoirdupois pound, which was standardized in 1959. Tire pressure conversion charts can be calculated using mathematical formulas that convert one unit of pressure to another. Quick conversion chart of psi to bar 1 psi to bar 0.06895 bar 10 psi to bar 0.68948 bar 20 psi to bar 1.37895 bar 30 psi to bar 2.06843 bar 40 psi to bar 2. History/origin: Pound-force per square inch is a unit that originated in the imperial and US customary systems of units. One psi is approximately 6,895 pascals (N/m 2). ![]() It is defined as the pressure that results when a force of one pound-force is applied to a one-square-inch area. Definition: A pound-force per square inch (symbol: psi) is an imperial and US customary unit of pressure based on avoirdupois units.
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