Heat Index Calculator - How to

Contains adsIn-app purchases
4.1
120 reviews
1K+
Downloads
Content rating
Everyone
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About this app

A heat index is an index that combines air temperature and relative humidity in an attempt to determine the human-perceived equivalent temperature; "how hot it feels." The result is also known as the "felt air temperature" or "apparent temperature." For example, when the temperature is 90°F with very high humidity, the heat index can be about 106°F.
This calculator calculates the heat index or apparent temperature.

The calculator takes as input the air temperature and dew point temperature or relative humidity, and calculates the heat index. This information can be used to make informed decisions related to outdoor activities, such as scheduling work or leisure activities, and to monitor potential heat-related health risks, especially during extreme heat events.

How to use this calculator:
1. Choose the appropriate calculator
2. Choose the temperature unit between degrees Fahrenheit, degrees Celsius. If you worry about the conversion, we have "Temperature Converter" tool that helps you to convert among different temperature units quickly.
3. Enter your dew point temperature or relative humidity (%)
4. "Calculate" button to estimate the heat index temperature.
5. The heat index temperature will be displayed in different temperature units.
6. There is short instruction / warning depend on the value of heat index.

If you experience problems with the “Heat Index Calculator - How to”, please contact us at dotri84@gmail.com.
Updated on
Aug 14, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location and Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.1
120 reviews
Billy Millions
July 16, 2024
Nice to have this tool when I'm working. I can use my instruments to take the readings, and calculate the actual heat index where I'm working. It is often much higher than where the weather stations are located, and helps me keep track of conditions and helps remind me to stay hydrated, so I can avoid heat related issues.
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Allen Harmon
June 24, 2025
Not completely accurate or accurate enough. Does NOT accurately reflect the Heat Index (Apparent Temperature) equation
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Matt Ramos
May 26, 2024
The results of heat index is supper accurate and very reliable, it's also super easy to use
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What’s new

Fix some issues:
+ Ads appearing after purchasing no-ads
+ App crashing