The metric system uses units such as meters, centimeters and kilograms.Īs you can see, the two different systems of measurement are quite different. The metric system, on the other hand, was developed by the French. The English system of measurement is a system that was developed by the British and uses units such as inches, feet and pounds. So, why are there three units of measurement? The answer lies in history and the different ways that countries have developed their own systems of measurement. KPA is a unit of pressure that is also based on the metric system. BAR is a unit of pressure that is based on the metric system. PSI is a unit of pressure that is based on the English system of measurement. So, what’s the difference? Keep reading to find out! The three units of pressure measurement: PSI, BAR and KPA.Īll three measures of pressure measure in different ways making the difference between PSI, BAR and KPA quite drastic. In this blog post, we will discuss the differences between these three units of measurement and which is more commonly used depending on where in the world you are from. KPA stands for kilopascals and is a metric unit of pressure. PSI stands for pounds per square inch and is a unit of pressure.īAR stands for bars and is also a unit of pressure. ![]() More pages related to measurement unit technical terms.If you are new to the world of pressure measurements, you may be wondering what is the difference between PSI, BAR and KPA. Yes a USA psi is the same amount as a UK psi. Is the US measure of psi the same as the UK? Seawater has a varying density due to variations in salinity, temperature and pressure at different depths and geo-locations. It’s approximately 2,168 psi if you assume the specific gravity density of freshwater at 4 degC of 1.0, the actual pressure will vary by a few percent depending the seawater properties. What is the reading in psi at 5000 ft below the surface of the ocean? A storage tank which contains water up to a level of 51.2 feet will push down on the bottom of the tank with a pressure of 22.2 psi. The pressure unit “ Feet of Water” is the pressure that a 1 foot high column of water exerts under the influence of gravity.Į.g. How do I convert 22.2 psi to feet of water and what is it?ġ psi = 2.30666 feet of water, therefore 22.2 psi = 51.2 feet of water. Psi to kPa = multiply by 6.89476… 22.2 psi to ftH2O Psi to bar = multiply by 0.0689476… psi to bar The factor for converting lbf/in² into bar is 0.068948., e.g. “lbf/in²” is one of the many acronyms used for “Pounds Force per Square Inch” pressure units of which “psi” is the most commonly used. ![]() What is meaning of lbf/in² and the relationship to bar? This graphic shows the equivalent bar values over the range 0 to 200 psi: ![]() What is european bar equivalent values for a 0-200 psi range? The 0-2 psi conversion scale below shows the conversion values around 1 psi. There are 16 oz in 1 lb, so 1 psi = 16 oz/in² What would be bar conversion scale for 0-20,000 psi range? mbar, hPa, Bar, inHg, mH2O, inH2O and ftH2O.Select a look up table for converting a pressure reading in pounds per square inch to other measurement units. Please note that the conversion factors above are accurate to 6 significant figures.
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