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The standard atmosphere (symbol: atm) is a unit of pressure defined as 101 325 Pa. It is sometimes used as a reference pressure or standard pressure. It is approximately equal to Earth's average atmospheric pressure at sea level. [1]
Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. 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. [2]
International Standard Atmosphere properties like pressure, temperature, density, viscosity, thermal conductivity and velocity of sound are indicated below. ρo = 1.2250 kg/m3.
Online calculator to convert atmospheres to kilopascals (atm to kPa) with formulas, examples, and tables. Our conversions provide a quick and easy way to convert between Pressure units.
NIST uses a temperature of 20 °C (293.15 K, 68 °F) and an absolute pressure of 1 atm (14.696 psi, 101.325 kPa). [3] This standard is also called normal temperature and pressure (abbreviated as NTP).
30 sie 2024 · Atmospheric pressure is expressed in several different systems of units: millimeters (or inches) of mercury, pounds per square inch (psi), dynes per square centimeter, millibars (mb), standard atmospheres, or kilopascals.
International Standard Atmosphere. Density Correction due to Humidity. Note : Density correction factor assumes approximately sea level pressure in the application of these formulae. Reference: "Handbook of Chemistry and Physics" Ed R.C.Weast, The Chemical Rubber Co., Ohio, 1964.
