![]() ![]() If you go ahead and buy a product using our link, we will receive a commission to help fund our not-for-profit mission and our campaigns work as a champion for the UK consumer. In some cases, however, we have included links to regulated brands or providers with whom we have a commercial relationship and, if you choose to, you can buy a product from our commercial partners. We do not make, nor do we seek to make, any recommendations on financial products or services that are regulated by the FCA, as we’re not regulated or authorised by the FCA to advise you in this way. Optimise Media is registered in England and Wales to Exchange Street Buildings, 35-37 Exchange Street, Norwich, England, NR2 1DP and company number 04455319. LifeSearch Partners Ltd is registered in England and Wales to 3000a Parkway, Whiteley, Hampshire, PO15 7FX, company number 03412386.ģ.Which? are an Introducer Appointer Representative of Optimise Media Limited (FRN 313408), for the introduction of HSBC Group, who are authorised and regulated by the Financial Conduct Authority to provide credit brokering activity. To convert from PSI to BAR you must divide by 14.5 (or multiply by 0. This also means that 1 PSI equals 6895 / 100,000 0.06895 bar (rounded 0.069 bar) To convert from BAR to PSI, multiply by 14.5. LifeSearch Partners Limited (FRN 656479), for the introduction of Pure Protection Contracts, who are authorised and regulated by the FCA to provide advice and arrange Pure Protection Contracts. This means that 1 bar equals 100,000 / 6895 14.5 PSI. Ltd is authorised and regulated by the Financial Conduct Authority (FCA) to provide advice and arrange non-investment motor, home, travel and pet insurance products (FRN310635) and is registered in England and Wales to Greyfriars House, Greyfriars Road, Cardiff, South Wales, CF10 3AL, company number 03857130. ![]() Ltd for the introduction of non-investment motor, home, travel and pet insurance products (FRN 610689). Which? Limited is registered in England and Wales to 2 Marylebone Road, London NW1 4DF, company number 00677665 and is an Introducer Appointed Representative of the following:ġ. Although the Pascal is used more in the scientific context, PSI is used more day-to-day. From tire pressure to gas pressure and quite a few others. The system came into use in England about 1300 and was used primarily in the international wool trade.Ĭurrent Use: PSI is used worldwide to measure a lot of pressures. It is based on the avoirdupois system, a system that uses weights in terms of the avoirdupois pound, which was standardized in 1959. History : This unit finds its history in the imperial and American system of units of measure. One PSI is approximately 6.895 Pascal (N/m2). It is defined as the pressure created when a force of one pound-force is applied to a surface of one square inch. To be able to do this anyway, an average approximation is always used.ĭefinition : A PSI is a unit used worldwide. Because it is not the same everywhere, you cannot simply apply a conversion factor to convert PSI to Pa or bar. The pressure that a Pound delivers depends on gravity which is not the same everywhere on earth. The PSI is an American unit and stands for Pounds per Square Inch. 1 atmosphere is therefore 1013 millibars and 1013 hectopascals. In this case, 1 millibar is exactly equal to 1 hectopascal. Air pressure is also regularly expressed in millibars or hectopascals. ![]() The atmosphere corresponds more closely to the average air pressure at sea level, and is defined as follows: 1 atm = 101.325 Pa so just over 1 bar. Meteorologists and weather forecasters worldwide use this unit, as an expression in Pascal would lead to much longer numerical results. Where atmospheric pressure equals 1013.25 mbar (101.325 kPa). Millibars (symbol: MB) is also commonly used to describe atmospheric pressure. To convert psi to bar, multiply the psi value by 0.0689475729 or divide by 14.5037738. The International Bureau of Weights and Measures, while indicating that authors are free to use bar, has not included it in the permitted list of the SI. 1 Pound force per square inch (psi) is equal to 0.0689475729 bar. The term “bar” comes from the Greek word “baros,” meaning weight.Ĭurrent usage : Although bar is the unit of pressure, it is not accepted by the International System of Units (SI) and is even disapproved in some areas. History: Bar was once introduced by Vilhelm Bjerknes, a Norwegian meteorologist who was at the forefront of modern weather forecasting. This unit is pretty much the standard reference when it comes to pressure. The bar is defined as 100,000 Pa, or 100 kPa. The bar is originally a British unit, and 1 bar roughly corresponds to the average air pressure at sea level (although 1 atmosphere (atm) is a better description). 1 2 By the barometric formula, 1 bar is roughly the atmospheric pressure on Earth. A pressure of 1 bar is slightly less than the current average atmospheric pressure on Earth at sea level (approximately 1.013 bar). However, Pascal is not the only unit used for pressure: The bar is a metric unit of pressure defined as 100,000 Pa (100 kPa), though not part of the International System of Units (SI).
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