Heat Index Calculator

Heat Index Calculator Tool

It’s a scorcher out there, huh? Want to know what the heat index is? Well – you’re not alone. Many internet searchers want to know “How do I calculate the heat index?”. Well – good news, your friends at Zippy Calc are here to the rescue! Introducing Zippy Calc’s Heat Index Calculator – With a simple four step process – you can know your heat index and be on your way. In fact – reading this paragraph and the rest of this page probably takes longer to do than actually using the calculator! If you’re curious about all of the benefits of our tool, or want to hear from some of our happy customers, read on below. If you’re interested, we’ve also got a whole collection of STEM tools for you to try out and help with your life.

Heat Index Calculator: A Comprehensive Understanding


The heat index, also known as “apparent temperature,” is essentially a calculation of what heat feels like to the human body when relative humidity is accounted for in conjunction with air temperature. It offers a more realistic depiction of thermal conditions in hot and humid weather. This article takes you through the history of measuring Heat Index, its relationship with weather measurements, and why it is critical in our daily life.

Quick Summary

  • Heat index is a measure of what the temperature feels like with humidity accounted for.
  • It plays a crucial role in defining thermal conditions.
  • This article will talk about the history, significance, and reasons for calculating the Heat Index along with some interesting trivia associated with it.

History of measuring heat index

The concept of measuring “apparent temperature” or the heat index was originally developed by R.G. Steadman in 1979. Steadman’s models were revised in 1990 and these are the standards currently used by weather agencies including the National Weather Service.

History of measuring weather measurements

Measuring weather conditions dates back to ancient civilizations where people used primitive methods to predict weather and carry out agriculture. With the progression of science, more intricate and accurate methods of measuring weather parameters including temperature, humidity, wind speed, and pressure were developed.

The link between heat index and weather measurements

The heat index calculation incorporates two weather measurements?air temperature and humidity. It illustrates how these components collectively impact human perception of the heat. For instance, when humidity is high, the body?s sweat does not evaporate as quickly, causing us to feel warmer than the actual air temperature.

Understanding the heat index and weather measurements is crucial as it aids in the assessment of potential heat-related risks. With climate change causing more instances of extreme heat, awareness of this index can assist in taking proper precautions against heatstroke and other related illnesses.

Common reasons to calculate heat index

Some of the common reasons to calculate the heat index include:

  • Weather forecasting
  • Event planning
  • Construction scheduling
  • Health advisories

Do you know?

Now that we have understood the basics, let’s look at some interesting trivia about measuring heat index and weather measurements:

  • The highest recorded heat index was 178?F in Dhahran, Saudi Arabia on July 8, 2003.
  • Weather balloons are used to measure various atmospheric parameters up to about 30km above the ground.
  • Anemometers are used to measure wind speed, while barometers are used for atmospheric pressure measurement.

Zippy Calc Key Benefits

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    Here’s a tidbit. We include stats and interesting facts alongside of each of our calculators. These may be helpful to you along your way and provide you an insight and link to a resource to help you on your way.


    Chose not to be boring. We’ve found that a lot of our competitors (yes, there are online calculator competitors, can you believe the world we live in) have very BORING websites. We’re not trying to be boring. We want you to have a chuckle.