Air Density at Altitude Calculator
Enter altitude from 0 to 25,000 m to estimate dry-air properties under the US Standard Atmosphere model.
Uses the US Standard Atmosphere 1976 troposphere and lower-stratosphere layers (0–25 km), with geometric altitude converted to geopotential altitude. Temperature is standard-atmosphere temperature, not a weather observation. Assumes dry air and hydrostatic, ideal-gas conditions.
ρ = p / (R T); geopotential altitude H = r₀h / (r₀ + h); layer pressure follows the hydrostatic ideal-gas relation.
For educational estimates only. This is not real-time weather data and is not suitable for aviation safety decisions, aircraft performance certification, or flight planning.
Standard temperature:
Standard pressure:
Air density:
A QUICK WALKTHROUGH
How to use this tool
- Altitude (m)
- Uses the US Standard Atmosphere 1976 troposphere and lower-stratosphere layers (0–25 km), with geometric altitude converted to geopotential altitude. Temperature is standard-atmosphere temperature, not a weather observation. Assumes dry air and hydrostatic, ideal-gas conditions.
- For educational estimates only. This is not real-time weather data and is not suitable for aviation safety decisions, aircraft performance certification, or flight planning.
Model and formula
ρ = p / (R T); geopotential altitude H = r₀h / (r₀ + h); layer pressure follows the hydrostatic ideal-gas relation. Uses the US Standard Atmosphere 1976 troposphere and lower-stratosphere layers (0–25 km), with geometric altitude converted to geopotential altitude. Temperature is standard-atmosphere temperature, not a weather observation. Assumes dry air and hydrostatic, ideal-gas conditions. For educational estimates only. This is not real-time weather data and is not suitable for aviation safety decisions, aircraft performance certification, or flight planning. Reference: NASA Glenn, Earth atmosphere; model constants and layer definitions follow the US Standard Atmosphere 1976. https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/earth-atmosphere/
GOOD TO KNOW
Common questions
Is this current local weather?
No. It returns standard-atmosphere values for the selected altitude, independent of location and current weather.