MAXScanner calculator widget
Heat Index Calculator — Temperature & Humidity
Editable live calculator
Change any input — the result updates immediately
No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.
Calculated result
37.1 °C heat index
Equivalent: 98.7 °F
Show the working
- 1. Convert air temperature to 89.6 °F.
- 2. Apply the NOAA/Rothfusz regression with 60% RH.
Shared links reopen these inputs; saved calculations stay in this browser unless you clear site data.