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Glossary » Units » Pressure » Standard Atmosphere
Standard Atmosphere (atm) is a unit in the category of Pressure. It is also known as standard atmospheres. This unit is commonly used in the INT unit system. Standard Atmosphere (atm) has a dimension of ML-1T-2 where M is mass, L is length, and T is time. It can be converted to the corresponding standard SI unit Pa by multiplying its value by a factor of 101325.
Note that the seven base dimensions are M (Mass), L (Length), T (Time), Q (Temperature), N (Aamount of Substance), I (Electric Current), and J (Luminous Intensity).

Other units in the category of Pressure include Atmosphere (metric) (at), Atmosphere (standard) (atm), Bar (bar), Barad (barad), Barye, CentiHg (0°C), Centimeter of Mercury (0°C) (cmHg (0 °C)), Centimeter of Water (4°C) (cmH2O), Dyne Per Square Centimeter (dyn/cm2), Foot of Water (4°C) (ft H2O), Gigapascal (GPa), Hectopascal (hPa), Inch of Mercury (0°C) (inHg (0 °C)), Inch of Mercury (15.56°C) (inHg (15.56 °C)), Inch of Water (15.56°C) (inH2O (15.56 °C)), Inch of Water (4°C) (inH2O (4 °C)), Kilogram Force Per Square Centimeter (kgf/cm2), Kilogram Force Per Square Decimeter (kgf/dm2), Kilogram Force Per Square Meter (kgf/m2), Kilogram Force Per Square Millimeter (kgf/mm2), Kilopascal (kPa), Kilopound Force Per Square Inch (kip/in2, ksi, KSI), Megapascal (MPa), Meter of Water (15.56°C) (mH2O, mCE (15.56 °C)), Meter of Water (4°C) (mH2O, mCE (4 °C)), Microbar (barye, Barrie) (µbar), Micron of Mercury (millitorr) (µHg (0 °C)), Millibar (mbar), Millimeter of Mercury (0°C) (mmHg, torr, Torr (0 °C)), Millimeter of Water (15.56°C) (mmH2O, mmCE (15.56 °C)), Millimeter of Water (4°C) (mmH2O, mmCE (4 °C)), Millitorr (mtorr), Newton Per Square Meter (N/m2), Ounce Force (av.) Per Square Inch (ozf/in2, osi), Pascal (Pa, N/m2), Pound Force Per Square Foot (lbf/ft2), Pound Force Per Square Inch (psi, PSI, lbf/in2), Poundal Per Square Foot (pdl/ft2), Poundal Per Square Inch (pdl/in2), Ton Force (long) Per Square Foot (tonf/ft2 (UK)), Ton Force (long) Per Square Inch (tonf/in2 (UK)), Ton Force (metric) Per Square Centimeter (tonf/cm2 (metric)), Ton Force (metric) Per Square Meter (tonf/m2 (metric)), Ton Force (short) Per Square Foot (tonf/ft2 (US)), Ton Force (short) Per Square Inch (tonf/in2 (US)), and Torr (torr).

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