Altitude and Performance

Air density, pressure and loading decide how an aircraft performs. These calculators turn the numbers on the altimeter, thermometer and loading sheet into the figures you plan with.

Tools in this group

Density Altitude Calculator. Enter the field elevation, altimeter setting and temperature to get the density altitude, the pressure altitude and the effect of humidity from an optional dew point.

InHg to hPa Converter. Enter an altimeter setting in inHg, hPa, mmHg or kPa to see it in the other units and how a change of setting moves the indicated altitude.

Mach Number Calculator. Convert between Mach number, true airspeed and calibrated airspeed from the outside air temperature, and add a pressure altitude for the calibrated airspeed.

Pressure Altitude Calculator. Enter the field elevation and the altimeter setting to get the pressure altitude, or work backward to the indicated altitude or the air pressure at an altitude.

True Airspeed Calculator. Enter the calibrated airspeed, pressure altitude and temperature to get the true airspeed, Mach number and equivalent airspeed, or run it backward from a TAS.

Weight and Balance Calculator. Enter each loading item with its weight and arm, plus fuel and the CG envelope, to get the center of gravity at takeoff and landing and see it on a chart.