🌡️ True Airspeed (TAS)
True airspeed from indicated airspeed, altitude and temp
About this calculator
True Airspeed is the airplane's actual speed through the air mass, and this calculator derives it from indicated airspeed. Enter indicated airspeed, pressure altitude, and outside air temperature; it corrects for decreasing air density with altitude. TAS grows roughly 2 percent per thousand feet over indicated, which is why flight planning and navigation use true values.
Tip: cross-check the result against your GPS groundspeed minus the wind — if they disagree wildly, suspect a pitot-static problem before trusting either number.