Heat Index Calculator
RH
0–100%
How to Use
- Enter air temperature and choose °C or °F.
- Enter relative humidity (%).
- Calculate heat index (feels-like temperature).
• Heat index is most meaningful for warm/humid conditions.
FAQ
What is heat index?
Heat index estimates how hot it feels when humidity is combined with air temperature.
What inputs do I need?
Air temperature and relative humidity (%).
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