Use the free Air Density at Altitude Calculator on ToolVexa to estimate air density at a given altitude, using a standard atmosphere approximation.
How to Use
Enter the altitude in metres, then press Calculate. The result is the estimated air density at that altitude.
Formula in Plain Words
Air density falls as altitude rises. This calculator uses the standard atmosphere approximation: density = 1.225 x (1 – 0.0000225577 x altitude)4.25588, where altitude is in metres and density is in kilograms per cubic metre. At sea level, the result is 1.225 kilograms per cubic metre.
Worked Example
At an altitude of 1,000 metres, the estimated air density is 1.11 kilograms per cubic metre.
FAQs
Is this an exact measurement? No. It is a standard atmosphere estimate. Real air density also depends on temperature and humidity.
Does it work at very high altitudes? This approximation is for the lower atmosphere, up to about 11,000 metres.
What is the density at sea level? About 1.225 kilograms per cubic metre in the standard atmosphere.