# 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.

#### Altitude Pressure

Altitude Pressure (mmHg)

### The barometric formula

The barometric formula describes the variation of barometric pressure with height. It can be expressed as:
$P=P_0e^{\frac{-\mu gh}{RT}}$,
where:
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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