Meteorological Conversions and Calculations
Heat Index Calculator
How do we calculate the heat index?
Choose the appropriate calculator and enter the values.
Then click "Calculate".
Using Dew Point Temperature

Using Relative Humidity



* Please note: The Heat Index calculation may produce meaningless results for temperatures and dew points
outside of the range depicted on the Heat Index Chart linked below.
Heat
Index Chart and Explanation
WPC Heat Index Forecasts
More Meteorological
Conversions and Calculations
