Altitude Pressure Calculator

Calculate the pressure at a given altitude using the barometric formula. Adjust the sea level pressure, temperature, and altitude to obtain the altitude pressure value.

Using the calculator

Enter the sea level pressure in mmHg (default: 760), the temperature in Celsius (default: 15), and the altitude above sea level in meters (default: 100). The calculator will use the barometric formula to calculate the corresponding altitude pressure in mmHg.

PLANETCALC, Altitude Pressure

Altitude Pressure

Altitude Pressure (mmHg)

The barometric formula

The barometric formula describes the variation of barometric pressure with height. It can be expressed as:
P=P_0e^{\frac{-\mu gh}{RT}},
P₀ is the sea level pressure (default: 760 mmHg)
μ is the molar mass of Earth's air (0.0289644 kg/mol)
g is the gravitational acceleration (9.80665 m/s²)
h is the height difference (altitude above sea level), in meters
R is the universal gas constant for air (8.31432 N·m/(mol·K))
T is the air temperature in Kelvin

By adjusting the altitude and temperature values, you can determine the corresponding pressure at a specific height. Please note that this calculation provides a theoretical value, as atmospheric pressure can be influenced by various factors such as humidity and weather conditions.

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PLANETCALC, Altitude Pressure Calculator