🔢 Pressure Altitude
Pressure altitude from field elevation and altimeter setting
About this calculator
Pressure Altitude is the altitude read on an altimeter set to 29.92 inches of mercury, and this calculator finds it from field elevation and the current altimeter setting — roughly 1,000 feet of pressure altitude change per inch of mercury. It is the baseline for all performance charts: takeoff, climb, and density altitude all start here.
Tip: set 29.92 in the Kollsman window and read the altimeter directly as a sanity check; the calculator result should match within a few dozen feet.