Heat Index Calculator
See how hot it feels from air temperature and humidity. A simple feels-like estimate for everyday comfort and room awareness.
Keep your temperature history on iPhone
Temperature Checker stores your manual readings privately on your device, with notes, profiles, and organized history.
How hot does it feel?
Feels like
32.8 °C
≈ 91.1 °F
Heat index combines air temperature and humidity to estimate how warm it feels. It is a general comfort-awareness estimate for shade conditions.
About the heat index
When the air is humid, sweat evaporates more slowly, so a given temperature feels warmer. The heat index captures this by combining temperature and humidity into a single feels-like number. It supports everyday comfort awareness for bedrooms, offices, nurseries, and outdoor plans.
Pair it with the room comfort checklist and the room comfort and temperature awareness guide. For cold conditions, try the wind chill calculator.
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See all free temperature tools.