Convert Celsius to Fahrenheit, Fahrenheit to Celsius, or calculate ISA temperature from pressure altitude. This free aviation calculator helps pilots and students work with temperature data during training and flight planning.
Use the calculators below to convert temperature units or estimate standard ISA temperature from pressure altitude.
Temperature affects aircraft performance, density altitude, and weather interpretation. Pilots often need quick conversions between Celsius and Fahrenheit, especially when working with aviation weather reports, aircraft manuals, and performance charts.
ISA temperature is also useful because it provides the standard temperature at a given altitude. Comparing actual temperature to ISA helps pilots understand how current conditions differ from standard atmosphere.
Aviation weather reports and many international aviation references use Celsius as the standard temperature unit.
Pilots may need Fahrenheit when using U.S.-based references, training materials, or interpreting non-aviation weather sources.
ISA temperature at sea level is 15°C.
Yes. Temperature conversions and ISA temperature are both useful when estimating density altitude and comparing conditions to standard atmosphere.