In 1971, at the 14 th General Conference on Weights and Measures, the pascal was adopted as an SI derived unit of pressure.Ĭurrent use: The kilopascal is widely used worldwide in countries that have adopted SI. The kilopascal is simply a multiple of the pascal, as is common within SI. History/origin: The unit, pascal, is named after Blaise Pascal, a French mathematician and physicist. A kilopascal is defined as 1,000 Pa, where 1 Pa is defined as the pressure exerted by a 1 newton force applied perpendicularly to an area of one square meter, expressed as 1 N/m 2 or 1 kg/m Kilopascalĭefinition: A kilopascal (symbol: kPa) is a multiple of the pascal (Pa), an SI (International System of Units) derived unit of pressure used to measure internal pressure, Young's modulus, stress, and ultimate tensile strength. 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 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.
#0.5 PSI TO KPA HOW TO#
The result is the pressure/stress in KPaįor example 10psi is 10圆.89476 ≈ 68.95 KPa How to convert kilopascal to pounds per sq.Multiply pressure/stress in psi with 6.89476.The relationship between KPa and other units of pressure and stress are shown in the following table: Unit The Pa unit describes how many Newtons (force) are applied on a unit area of square meters. It is a multiple of Pascal (1 KPa = 1000 Pa), which is a derived unit, based on the Newton, a unit of force and the meter squared, which is a unit of area. Kilopascal is a unit of pressure and stress according to the SI system of units. The relationship between psi and other units of pressure and stress are shown in the following table: Unit With the above definitions of lb-f and the inch, relative to their metric equivalents, the conversion rule from psi to KPa becomes: Today, it is defined through the meter SI unit as: 1 in = 0.0254 m (= 2.54 cm = 25.4 mm).
It was historically conceived as the length of 3 barley-corns. Inch is a unit of length for the Imperial and US customary system of units.
The above definition depends on the earth's gravity g, which varies from place to place, but is typically standardized as g ≈ 9.80665 m/s 2 ≈ 32.174049 ft/s 2. Its equivalence to the respective metric unit, the Newton is: 1 lb-f = 4.4482216152605 N. Pound-force is defined as the force of gravity on the earth's surface upon a mass equal to one avoirdupois pound. The definition of psi depends on the definitions of the pound-force and the inch units. The psi unit describes how many pounds (force) are applied on a unit area of square inch. The unit is derived from the pound-force lb-f, a unit of force and the inch squared, which is a unit of area. The pounds per square inch is a unit of pressure and stress according to the Imperial and US customary systems of units. Conversion table from psi to KPa Pounds per square inch
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