METEOROLOGY – ATMOPHERIC PREURE & ALTIMETRY CALCULATOR
Pressure To Altitude
A precise tool.
What is the Pressure To Altitude & How does it work?
Atmospheric pressure decreases with increasing altitude due to the weight of the air above a given point. This relationship is described by the hypsometric equation, which relates atmospheric pressure at different altitudes.
The standard atmosphere model assumes that temperature decreases linearly with height in the troposphere, leading to an exponential decrease in pressure. The formula for calculating altitude from pressure is derived from this model:
h = frac{T_0}{g/R} cdot lnleft(frac{P_0}{P}right)
h = altitude in meters, T0 = standard temperature at sea level (288.15 K), g = gravitational acceleration (9.80665 m/s²), R = specific gas constant for dry air (287.058 J/(kg·K)), P0 = standard pressure at sea level (101325 Pa), P = measured pressure in Pascals.
This formula provides a good approximation for altitudes up to about 11,000 meters under standard atmospheric conditions.
Parameters
Result
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Frequently Asked Questions
How do I calculate altitude from pressure?
Use the formula h = (T0 / gR) * ln(P0 / P), where T0 is the standard temperature, g is acceleration due to gravity, R is the specific gas constant for dry air, and P0 and P are reference and actual pressures respectively.
What does atmospheric pressure decrease with?
Atmospheric pressure decreases with increasing altitude due to the weight of the air above a given point.
How is temperature assumed to change with height in the troposphere?
In the standard atmosphere model, temperature is assumed to decrease linearly with height in the troposphere.
What does the hypsometric equation relate?
The hypsometric equation relates atmospheric pressure at different altitudes.
How is pressure related to altitude?
Pressure decreases exponentially with increasing altitude in the troposphere due to the weight of air above a given point.
What does P0 represent in the formula?
P0 represents the reference pressure, typically sea level pressure (1013.25 hPa).
How accurate is this model for calculating altitude from pressure?
The standard atmosphere model provides a good approximation for calculating altitude from pressure in the troposphere but may not be as accurate at higher altitudes or in areas with significant temperature variations.
Results are for informational purposes only and do not constitute professional advice.