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Heat Index Calculator

Fill in the temperature plus humidity and click on ‘Calculate’ to calculate the Heat Index temperature and categories.(Only above 20°C.)
Temperature (°C)
Humidity (%)
   
Heat Index (°C)
Description

Introduction of Heat Index:

The heat index is also known as "Humiture". The heat index is a metric that combines temperature of air and relative humidity or dew point.


Effects of the heat index

CelsiusFahrenheitNotes
27-32°C80-90°FCaution: fatigue is possible with prolonged exposure and activity. Continuing activity could result in heat cramps.
32-41°C90-105°FExtreme caution: heat cramps and heat exhaustion are possible. Continuing activity could result in heat stroke.
41-54°C105-130°FDanger: heat cramps and heat exhaustion are likely; heat stroke is probable with continued activity.
Over 54°COver 130°FExtreme danger: heat stroke is imminent.