Pressure & Density Altitude Visual Calculator
A simple visual calculator showing field elevation, the QNH sea-level reference, pressure altitude, and density altitude.
QNH Difference
0.0 hPa
Difference from standard pressure (1013.25 hPa)
Pressure Altitude
0 ft
0 m
Density Altitude
0 ft
0 m
PA = Elevation + (1013.25 − QNH) × 27 ft/hPa
DA = PA + 120 × (OAT − ISA Temperature)
DA = PA + 120 × (OAT − ISA Temperature)