Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. You can find metric conversion tables for SI units, as well as English units, currency, and other data. It is the pressure resulting from a force of one pound-force applied to an area of one square inch.Ĭ provides an online conversion calculator for all types of measurement units. 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. Piston engine aircraft with constant-speed propellers also use inHg to measure manifold pressure, which is indicative of engine power produced. The resulting altimeter readings are known as flight levels. We assume you are converting between foot of water 4 ☌ and pound/square inch.You can view more details on each measurement unit: foot of water or psi The SI derived unit for pressure is the pascal. How many foot of water in 1 psi The answer is 2.3066587368787. It is defined as the pressure exerted by a column of mercury of 1 inch in height at 32 ☏ (0 ☌) at the standard acceleration of gravity.Īircraft operating at higher altitudes (above 18,000 feet) set their barometric altimeters to a standard pressure of 29.92 inHg or 1,013.2 hPa (1 hPa = 1 mbar) regardless of the actual sea level pressure, with inches of mercury used in the U.S. More information from the unit converter. It is still widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere. Inches of mercury or inHg is a non-SI unit for pressure. Psi to inhg, or enter any two units below: Enter two units to convert From: Read on 1 kilopascals (kpa) is equal to 0.1450377377 pound-force per square inch (psi) 1 pound-force per square inch (psi) is equal to 6.894757294604437 kilopascals (kpa) kpa to psi Formula: The formula for is: psi kPa 6. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types.You can do the reverse unit conversion from The definition of psi is entire based on the both definitions of the pound-force and the inch units. 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. Example: convert 15 GPa to Pa: 15 GPa 15 × 1000000000 Pa 15000000000 Pa. Thus a reading of 30 psig on a tire gauge represents an absolute pressure of 44.7 psi. If a pressure gauge is calibrated to read zero in space, then at sea level on Earth it would read 14.7 psi. Humans do not feel this pressure because internal pressure of liquid in their bodies matches the external pressure. 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. Psi to psig, or enter any two units below: Enter two units to convert From: You can do the reverse unit conversion from
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