Symbols, abbreviations, or full names for units of length,Īrea, mass, pressure, and other types. You can find metric conversion tables for SI units, as wellĪs English units, currency, and other data. It is the pressure resulting from a force of one pound-force applied to an area of one square inch.Ĭonversion calculator for all types of measurement units. 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. The unit is named after Blaise Pascal, the eminent French mathematician, physicist and philosopher. 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 SI prefix "mega" represents a factor of Psi to MPa, or enter any two units below: Enter two units to convert From: Here’s how you can calculate that: 800 kPA × 0.14504 116.032 PSI As you can see, 800 kPA is equal to 116.032 PSI. pascal Pa 1 kilopascal kPa 1000 pascal Pa kilopascal to pascal, pascal to kilopascal. 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.You can do the reverse unit conversion from Complete list of pressure units for conversion. 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. 3379 Pa: 1.0 Pa: 0.1 psi 689.7 Pa: 0. Pa: 0. Pa: 1.0 Pa: 0.11 psi 758.6 Pa: 0. Pa: 0. Pa: 1. 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. We assume you are converting between pascal and pound/square inch.You can view more details on each measurement unit: Pa or psi The SI derived unit for pressure is the pascal. How many Pa in 1 psi The answer is 6894.75728. ![]() Meteorologists and weather reporters worldwide often use this unit for convenience, since working in pascals would result in much larger values. More information from the unit converter. 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. You can view more details on each measurement unit: psig or psi The SI derived unit for pressure is the pascal. It is equal to 0.987 atmospheres (101,325 Pa), the unit often used as a reference of standard pressure. We assume you are converting between pound/square inch gauge and pound/square inch. Definition: A bar (symbol: bar) is a metric unit of pressure that is defined as exactly 100,000 pascals (symbol: Pa).
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