Barometric Pressure or Atmospheric Pressure evaluator uses Atmospheric Pressure = Density*[g]*Height of Mercury Column to evaluate the Atmospheric Pressure, The Barometric Pressure or Atmospheric Pressure formula is defined as the product of density of liquid filled in barometer, gravitational acceleration and height of mercury column above free surface. Atmospheric pressure is measured by a device called a barometer; thus, the atmospheric pressure is often referred to as the barometric pressure. The Italian Evangelista Torricelli (1608–1647) was the first to conclusively prove that the atmospheric pressure can be measured by inverting a mercury-filled tube into a mercury container that is open to the atmosphere. A frequently used pressure unit is the standard atmosphere, which is defined as the pressure produced by a column of mercury 760 mm in height at 0°C (𝜌 Hg = 13,595 kg/m3 ) under standard gravitational acceleration (g = 9.807 m/s2 ). If water instead of mercury were used to measure the
standard atmospheric pressure, a water column of about 10.3 m would be needed. Atmospheric Pressure is denoted by Patm symbol.
How to evaluate Barometric Pressure or Atmospheric Pressure using this online evaluator? To use this online evaluator for Barometric Pressure or Atmospheric Pressure, enter Density (ρ) & Height of Mercury Column (hm) and hit the calculate button.