Standard atmosphere atm
About the Standard atmosphere
The standard atmosphere is exactly 101,325 pascals, roughly average sea-level air pressure. It was historically the pressure of a 760 mm column of mercury at 0 °C under standard gravity, and the 10th CGPM fixed it in 1954. It equals about 14.696 psi, 1.01325 bar and 29.92 inches of mercury.
Related Units
Torr
Torr101,325/760 Pa ≈ 133.322 Pa
The torr is exactly 1/760 of a standard atmosphere, about 133.322 pascals. It is named after Evangelista Torricelli...
Millimetre of mercury
mmHg133.322387415 Pa (conventional)
The conventional millimetre of mercury is the pressure of a 1 mm column of mercury of standard density under standard...
Pascal
Pa1 Pa = 1 N/m² = 1 kg·m⁻¹·s⁻²
The pascal is a pressure of one newton per square metre, named after Blaise Pascal. It is a small unit: standard...
Bar
bar1 bar = 100,000 Pa (exact)
The bar equals 100 kilopascals, close to but slightly less than one standard atmosphere of 101,325 Pa. Its submultiple...