It is approximately equal to Earth 's average atmospheric pressure at sea level. It is sometimes used as a reference pressure or standard pressure. 1 atm 101,325 Pa: pounds per square inch: psi or lbf/in 2: Non-SI (International) millimeters of mercury: mmHg: Non-SI (International) 1 mmHg 133. So, to convert directly from bar to pounds per square inch, you multiply by 14.503774. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101 325 Pa. Or, you can find the single factor you need by dividing the A factor by the B factor.įor example, to convert from bar to pounds per square inch you would multiply by 100000 then divide by 6894.757. Psi (Pound Force Per Square Inch) Conversion: Psi is a pressure unit and equals to the force of one pound applied to one square inch. To convert among any units in the left column, say from A to B, you can multiply by the factor for A to convert A into Pascals then divide by the factor for B to convert out of Pascals. To convert from Pa into units in the left columnĭivide by the value in the right column or, multiply by the reciprocal, 1/x.ĥ00000 Pa / 100000 = 5 bar Multiply by the conversion value in the right column in the table below.ĥ bar * 100000 = 500000 Pa To simply convert from any unit into pascals, for example, from 5 bar, just Where S is our starting value, C is our conversion factor, and How to Convert Units of PressureĬonversions are performed by using a conversion factor. By knowing the conversion factor, converting between units can become a simple multiplication problem: Conversion units for the Pressure Converter. Some are obvious, such as pounds per square inch, but even the SI standard Pascal is actually an expression of one Newton per square meter. Note that we also have an individual mmHg to atm converter available. It is sometimes used as a reference pressure or standard pressure. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101325 Pa (1.01325 bar). Since pressure is derived from force and area, many units for pressure directly relate force to area. 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. Where P is equal to pressure, F is the normal force and A is area. To convert atm to psi, multiply the atm value by 14.6959488. Pressure is a scalar quality reflecting how force acts on a surface. 1 Atm (atmospheric pressure) is equal to 14.6959488 psi.
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