Heat Index Calculator
Calculate the "feels like" temperature based on air temperature and humidity for heat safety planning.
Inputs
About the Heat Index Calculator
The Heat Index Calculator estimates how hot it actually feels when relative humidity is combined with the air temperature. This is important for assessing the risk of heat-related illnesses and planning outdoor activities safely.
•Features
- –Calculates the perceived temperature by combining air temperature and humidity.
- –Provides heat index values in both °F and °C.
- –Indicates risk levels for heat-related health issues.
- –Helps plan outdoor activities and stay safe in extreme conditions.
•How to Use
- 1.Enter the air temperature (°F or °C).
- 2.Enter the relative humidity (%).
- 3.Click “Calculate” to see the heat index value and the associated risk level.
- 4.Use this information to plan outdoor activities safely and prevent heat-related illness.
•Heat Risk Levels
- –< 80°F: No Risk
- –80–90°F: Caution
- –90–103°F: Extreme Caution
- –103–125°F: Danger
- –> 125°F: Extreme Danger
•Important Notes
- Valid for temperatures above 80°F (27°C).
- Requires humidity above 40% for accurate readings.
- Based on shady conditions with light wind.
- Direct sunlight can increase perceived heat by up to 15°F (8°C).
- Use as a guideline for outdoor safety and hydration planning.