Humidex Calculator
Humidex = T + 0.5555(e−10), with vapor pressure estimated from dew point.
Inputs and units
- Air temperature (°C): Enter your value in the format and unit shown.
- Relative humidity (%): Enter your value in the format and unit shown.
Calculation method
Humidex = T + 0.5555(e−10), with vapor pressure estimated from dew point.
Worked example
The example values are: Air temperature (°C) = 30; Relative humidity (%) = 60
- Humidex: 38.7658858843
- Estimated dew point (°C): 21.3900069
Assumptions and limitations
Humidex is an index, not a measured air temperature. Wind, sun and personal conditions are not represented.
Using your result
Select Calculate after changing inputs. Copy result copies the displayed output; Download result saves a text file. Reset returns the form to its example inputs. Calculations run in your browser.
Humidex Calculator FAQs
What method does this calculator use?
Humidex = T + 0.5555(e−10), with vapor pressure estimated from dew point.
What should I check before using the result?
Humidex is an index, not a measured air temperature. Wind, sun and personal conditions are not represented.