# Altitude Pressure

This calculator uses barometric formula to find out the pressure at the given altitude

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The equation for the variation of barometric pressure with height, called barometric formula, has the form

,

where

- Molar mass of Earth's air, 0.0289644 kg/mol

- Gravitational acceleration, 9.80665 m/(s*s)

- Height difference, meters

- Universal gas constant for air, 8.31432 N·m /(mol·K)

- Air temperature, К

Default value for is 760 mmHg, i.e. standard barometric pressure, 101.325 kPa or 1 atmosphere. It also corresponds to 0 meters above sea level and can be left as is. Change the height (altitude above sea level) and temperature and get the results. Note that this is a theoretical value; in reality, atmosphere pressure depends not only on altitude and temperature but also on other factors such as humidity and weather conditions.

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