Density Altitude Calculator
Density altitude is pressure altitude corrected for temperature, and it is the number that really matters for how an aircraft, a naturally aspirated engine or a wing will perform. On a hot day the thin, low density air behaves like a much higher altitude, robbing lift, thrust and power, which is the hidden cause behind many mountain and summer accidents. This calculator uses the standard field approximation that adds about one hundred twenty feet of density altitude for every degree Celsius the air is warmer than the standard temperature for that pressure altitude, where the standard lapse rate is roughly two degrees Celsius per one thousand feet from a fifteen degree Celsius sea level base. Enter the pressure altitude and the outside air temperature, choose Celsius or Fahrenheit, and read the density altitude with a short performance note. It is a quick preflight sanity check for hot and high conditions. All math runs locally in your browser for private answers.
How to use Density Altitude Calculator
- Enter the pressure altitude.
- Enter the outside air temperature.
- Read the density altitude.
- Use it to gauge aircraft and engine performance loss.
Frequently asked questions
What is density altitude?
It is the pressure altitude corrected for temperature, giving the altitude the air density actually feels like to an aircraft and its engine.
Why does hot weather raise density altitude?
Warm air is thinner, so on a hot day the aircraft performs as if it were at a much higher altitude, reducing lift, thrust and climb rate.
What does hot and high mean for pilots?
High elevation combined with high temperature pushes density altitude far above field elevation, sharply cutting performance, which is a key takeoff safety concern.
What is Density Altitude Calculator?
Density altitude is pressure altitude corrected for temperature, and it is the number that really matters for how an aircraft, a naturally aspirated engine or a wing will perform. On a hot day the thin, low density air behaves like a much higher altitude, robbing lift, thrust and power, which is the hidden cause behind many mountain and summer accidents.
Is Density Altitude Calculator free to use?
Yes. Density Altitude Calculator is completely free, with no sign-up and no usage limits.
Does Density Altitude Calculator work in a web browser?
Yes. Density Altitude Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with Density Altitude Calculator?
Yes. Density Altitude Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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