Symbols, abbreviations, or full names for units of length,Īrea, mass, pressure, and other types. 2 The atm unit is roughly equivalent to the mean sea-level atmospheric pressure on Earth that is, the Earth's atmospheric pressure at sea level is. You can find metric conversion tables for SI units, as wellĪs English units, currency, and other data. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa ), which is equivalent to 1,013.25 millibars, 1 760 mm Hg, 29.9212 inches Hg, or 14.696 psi. Thus a reading of 30 psig on a tire gauge represents an absolute pressure of 44.7 psi.Ĭonversion calculator for all types of measurement units. If a pressure gauge is calibrated to read zero in space, then at sea level on Earth it would read 14.7 psi. Task: Convert 7 megapascals to atmospheres (show work) Formula: MPa 0.101325 atm Calculations: 7 MPa 0.101325 69.0846 atm Result: 7 MPa is equal to 69.0846 atm Conversion Table For quick reference purposes, below is a conversion table that you can use to convert from MPa to atm. Humans do not feel this pressure because internal pressure of liquid in their bodies matches the external pressure. Conversion Formula Lets take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper. At sea level, Earth's atmosphere actually exerts a pressure of 14.7 psi. By contrast, psia measures pressure relative to a vacuum (such as that in space). Psig (pound-force per square inch gauge) is a unit of pressure relative to the surrounding atmosphere. It is approximately equal to Earth's atmospheric pressure at sea level. 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). atm to kilogram-force/square millimeter. Psig to atm, or enter any two units below: Enter two units to convert From: Symbols, abbreviations, or full names for units of length,Īrea, mass, pressure, and other types.You can do the reverse unit conversion from You can find metric conversion tables for SI units, as wellĪs English units, currency, and other data. It is approximately equal to Earth's atmospheric pressure at sea level.Ĭonversion calculator for all types of measurement units. We assume you are converting between pound/square inch and millimeter of mercury 0 ☌.You can view more details on each measurement unit: psi or mmHg The SI derived unit for pressure is the pascal. atmospheres bars millibars pascals kilopascals pounds per square inch (psi) pounds per square foot (psf) torrs mmhg. The user must fill one of the two fields and the conversion will become automatically. 1 pound per square foot 0.0004725 atmospheres. How many psi in 1 mmHg The answer is 0.019336777871316. This tool converts pounds per square foot to atmospheres (psf to atm) and vice versa. It is the pressure resulting from a force of one pound-force applied to an area of one square inch. More information from the unit converter. 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. You can do the reverse unit conversion fromĪtmosphere to psi, or enter any two units below: Enter two units to convert From:
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