Health & fitness · NUMORA
Heat Index Calculator
Temperature + humidity → how hot it feels.
Open interactive calculatorHow to use
Rothfusz regression; we convert from °C.
Formula
NOAA heat index
FAQ
Is this Heat Index calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
Rothfusz regression; we convert from °C.
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