Humidex Calculator

Estimate Humidex locally from air temperature and relative humidity using the standard Canadian formula.

Air temperature (°C)

Relative humidity (%)

—Humidex

—Dew point

—Vapor pressure

—Humidex − air temperature

Uses the standard Environment and Climate Change Canada Humidex formula. Humidex is an index, not an air-temperature measurement or a substitute for official heat warnings.

How to use this Humidex Calculator

Calculate the Environment and Climate Change Canada Humidex from temperature and humidity. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.