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Aviation Calculators

Density Altitude Calculator

Density altitude from pressure altitude and temperature, with the performance penalty.

Enter values

Results update as you type.

Result

Density altitude

5,613 ft

Pressure altitude
3,000 ft
ISA temperature
9.1 °C
ISA deviation
20.9 °C
Above field elevation by
2,613 ft
Take-off distance increase
31.4%
Assessment
Elevated — check performance charts carefully

An approximation for awareness — use the aircraft performance charts for operational planning.

About the Density Altitude Calculator

Density altitude from pressure altitude and temperature, with the performance penalty.

Also known as: da calculator, hot and high performance, density height, altitude performance.

How to use this calculator

  1. Enter field elevation, altimeter setting, outside air temperature, relative humidity.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

DA ≈ pressure altitude + 120 × (OAT − ISA temperature)

Worked example

Using the values pre-filled in the calculator above:

  • Field elevation = 3,000 ft
  • Altimeter setting = 1,013.25 hPa
  • Outside air temperature = 30 °C
  • Relative humidity = 50 %

the calculator returns:

  • Density altitude: 5,613 ft
  • Pressure altitude: 3,000 ft
  • ISA temperature: 9.1 °C
  • ISA deviation: 20.9 °C