Calculate pressure altitude from field elevation and altimeter setting. This aviation pressure altitude calculator supports inHg, hPa, mbar, kPa, PSI, and mmHg, with results in feet or meters.
Field elevation:
Enter the airport, runway, or location elevation above or below sea level.
Altimeter setting:
Enter the current altimeter setting. The standard aviation reference is 29.92 inHg, or about 1013.25 hPa.
Pressure altitude:
The calculator estimates the altitude in the standard atmosphere that matches the current pressure level.
A pressure altitude calculator is useful for aviation planning, density altitude checks, aircraft performance estimates, flight training, airport conditions, and understanding how pressure changes affect aircraft performance.
Always use official aircraft performance charts, current weather, and approved flight planning tools for real-world aviation decisions.
The common aviation pressure altitude formula is:
Pressure Altitude = Field Elevation + (29.92 - Altimeter Setting) × 1000
Use field elevation plus the pressure correction: pressure altitude = field elevation + (29.92 - altimeter setting) × 1000.
Pressure altitude becomes higher than field elevation because lower pressure acts like a higher standard-atmosphere altitude.
Pressure altitude becomes lower than field elevation because higher pressure acts like a lower standard-atmosphere altitude.
No. Pressure altitude is based on pressure. Density altitude also accounts for temperature and is more directly tied to aircraft performance.