Atmospheric pressure, also called barometric pressure, force per unit area exerted by an atmospheric column. The below atmospheric pressure calculator helps you to calculate the sea level pressure from the atmospheric pressure, temperature and altitude at the present location. Standard sea level pressure, by definition, equals 760 mm of mercury, 14.70 pounds per square inch, 1,013.25 × 103 dynes per square centimetre, 1,013.25 millibars, one standard atmosphere, or 101.325 kilopascals.
Calculate sea level pressure for atmospheric pressure as 5 Pa, temperature lapse rate of 0.0065 k/m, altitude of 7 cm, sea level standard temperature of 288.15 k, molar mass of dry air as 0.0288 kg/mol and gas constant as 8.314 j/(mol*k).
po = 5 / (1 - ((0.0065x7) / 288.15))((9.8x0.0289) / (8.3144x0.0065))
= 5.0417 Pa .