Calculate pressure altitude using field elevation and altimeter setting. This free aviation calculator helps pilots with performance planning, density altitude calculations, and standard atmosphere comparisons.
Enter field elevation and altimeter setting to calculate pressure altitude in feet.
Pressure altitude is based on field elevation corrected for nonstandard pressure. It is one of the most common starting points for performance calculations.
If altimeter setting is below 29.92, pressure altitude increases. If altimeter setting is above 29.92, pressure altitude decreases.
Pressure altitude is the altitude shown when an altimeter is set to 29.92 inches of mercury. It is not necessarily the same as field elevation because atmospheric pressure changes from day to day.
Pilots use pressure altitude as a standard reference point for aircraft performance calculations, ISA temperature comparisons, and density altitude estimates.
Standard altimeter setting is 29.92 inHg.
When altimeter setting is lower than 29.92, pressure altitude is higher than field elevation.
Yes. At airports below sea level or in certain pressure conditions, pressure altitude can be negative.
No. Pressure altitude is corrected only for pressure. Density altitude further adjusts for temperature.