Heat Index Calculator – Feels Like Temperature (Humidity + Heat)

Heat Index Calculator

Calculate the heat index (feels like temperature) using air temperature and humidity. High humidity makes it feel hotter than the actual temperature.

Calculate Heat Index

Enter temperature and humidity.

Feels Like

Heat Level

Risk Level

Quick Heat Index Examples

30°C / 70%

Feels like ~36°C

32°C / 80%

Feels like ~44°C

35°C / 60%

Feels like ~45°C

28°C / 90%

Feels like ~40°C

Heat Index Levels

27–32°C

Caution

32–41°C

Extreme Caution

41–54°C

Danger

54°C+

Extreme Danger

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About Heat Index

The heat index measures how hot it feels when humidity is combined with air temperature. High humidity reduces the body's ability to cool itself, making temperatures feel significantly hotter.