![]() ![]() 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. 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. ![]() 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). 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. 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. It is based on the avoirdupois system, a system that uses weights in terms of the avoirdupois pound, which was standardized in 1959. History/origin: Pound-force per square inch is a unit that originated in the imperial and US customary systems of units. ![]() One bar is 14.50377 psi, and we can therefore make the following bar to psi formula: bar × 14. Psi is short for pound-force per square inch (lbf/in), and it is the pressure from one pound-force applied to an area of one square inch. One psi is approximately 6,895 pascals (N/m 2). A bar is a little less than the average atmospheric pressure on earth at sea level. It is defined as the pressure that results when a force of one pound-force is applied to a one-square-inch area. Please visit pressure conversion to convert all pressure units.Definition: A pound-force per square inch (symbol: psi) is an imperial and US customary unit of pressure based on avoirdupois units. Psi (pound force per square inch) is 1 pound of force per square inch. ![]() What is Psi (Pound force per square inch)? To convert psi to bar, multiply the psi value by 0.0689475729 or divide by 14.5037738.įor example, to convert 50 psi to bar, multiply 50 by 0.0689475729 (or divide by 14.5037738), that makes 3.44737865 bar is 50 psi.īar is a pressure unit and is about equal to the atmospheric pressure at sea level. Psi = bar * 14.5037738 Advertisements How to convert psi (pound per square inch) to bar?ġ Pound per square inch (psi) is equal to 0.0689475729 bar. To convert bar to psi, multiply the bar value by 14.5037738.įor example, to convert 6 bar to psi, multiply 6 by 14.5037738, that makes 87.0226 pound per square inch is 6 bar. How to convert bar to psi (pound per square inch)?ġ Bar is equal to 14.5037738 pound per square inch (psi). Alternatively, to find out the pound force per square inch value for the most commonly converted bar values, you may check the bar to psi table.īelow, you will find information on how to convert bar to psi and how to convert psi to bar, including the formulas and example conversions. To convert bar to psi (pound force per square inch), you may use the bar to psi converter above. ![]()
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