Your Result
About the Dew Point Calculator
This calculator determines the dew point temperature from the air temperature and relative humidity you provide. You get one dew point value, shown in degrees Celsius or Fahrenheit. The result shows the temperature at which the air becomes saturated and water vapor starts to condense.
The calculation uses the Magnus formula, a standard approximation for dew point in meteorology. You enter the air temperature and the relative humidity as a percentage. The formula combines both values through a logarithmic relation to find the saturation temperature. A dew point above 20 °C (68 °F) usually feels muggy, so use the result to judge indoor comfort or condensation risk on windows and pipes.
- Enter the air temperature in your preferred unit.
- Type the relative humidity as a percentage between 0 and 100.
- Read the dew point temperature shown in the result field.