![]() ![]() 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.ġ5 bar = 15 × 14.503773773 psi = 217. Today, it is defined through the meter m SI unit as: 1 in 0.0254 m ( 2.54 cm 25.4 mm). 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 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. Pound-force per square inchĭefinition: A pound-force per square inch (symbol: psi) is an imperial and US customary unit of pressure based on avoirdupois units. Meteorologists and weather reporters worldwide often use this unit for convenience, since working in pascals would result in much larger values. 1 megapascal 1000 kilopascal 1 kilopascal 0.001 megapascal Example: convert 32 MPa to kPa: 32 MPa 0. 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. Symbols, abbreviations, or full names for units of length,Īrea, mass, pressure, and other types.Definition: A bar (symbol: bar) is a metric unit of pressure that is defined as exactly 100,000 pascals (symbol: Pa). You can find metric conversion tables for SI units, as wellĪs English units, currency, and other data. Example: Convert 32 psi to kpa We know 1 psi 6.8947572932 kpa 1 kpa 0.1450377377 psi. The unit is named after Blaise Pascal, the eminent French mathematician, physicist and philosopher.Ĭonversion calculator for all types of measurement units. The pascal (symbol Pa) is the SI unit of pressure.It is equivalent to one newton per square metre. The definition of a pascal is as follows: The value will be converted to all other. Simply select the input unit, enter the value and click 'Convert' button. This is simple to use online converter of weights and measures. The SI prefix "kilo" represents a factor of foot) The pressure value 0.5 kPa (kilopascal) in words is 'zero point five kPa (kilopascal)'. 1 psi psi 6894.7572931783 pascal Pa psi to pascal, pascal to psi. 00 pascal Pa bar to pascal, pascal to bar. pascal Pa 1 kilopascal kPa 1000 pascal Pa kilopascal to pascal, pascal to kilopascal. ![]() Since atmospheric pressure at sea level is around 14.7 psi, this will be added to any pressure reading made in air at sea level. Complete list of pressure units for conversion. Pounds per square inch absolute (psia) is used to make it clear that the pressure is relative to a vacuum rather than the ambient atmospheric pressure. Kilopascal to psia, or enter any two units below: Enter two units to convert From: 1 psi 0.0689475729 bar Example: convert 15 bar to psi: 15 bar 15 × 14.503773773 psi 217. You can do the reverse unit conversion from ![]()
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