How To Check Room Temperature Without A Thermometer?

Sometimes, the room temperature can be easily checked by looking at the parameters shown on the thermometer. However, what if there’s no thermometer around that you can use?

If you know some helpful tips, you could easily determine or estimate the temperature of the room without a thermometer. And that is what we offer you today. 


All of these methods are very practical and easy-to-follow. Once you learn these little tricks, you can be less reliant on those temperature measurement devices. 

Read on for all the details on how to check room temperature without a thermometer.

What Is The Room Temperature?

First, we have to make it clear that temperature is a physical measure of matter, roughly “hot” and “cold”. The higher the temperature of the material, the hotter it is. Temperature can be measured in many ways, but people often use degrees Celsius (degrees Celsius) and Fahrenheit (degrees Fahrenheit) for measurement.

Room temperature, on the other hand, is a general term for a certain temperature in an enclosed space that people are accustomed to. Therefore, room temperature is often indicated by human comfort, with the common range being 18-23 degrees C (64 – 73 degrees F).

According to the medical definition, the range considered suitable for human accommodation is between 15 – 25 degrees C (59 – 77 degrees F). Although people can extend comfort beyond this range, it depends on factors such as health, weather, humidity, and air circulation level.

How To Check Room Temperature Without A Thermometer – Some Ways For You

Use Your Smartphone

You can use your smartphone to determine the temperature in the room. It might not give you the same data as high-end thermometers, but you can have yourself a decent reading that is sufficient for an accurate temperature estimate.

A large number of different smartphone applications in the field are capable of acting as real thermometers. And now, if you want a practical way to know the temperature in the room, just pull your smartphone out of your pocket and download an app that gives you the information you need. 

These thermometer applications are available for free on most smartphones. So, don’t be afraid that they are hard to get, just a piece of cake!

Use Your Body

Using your real body would be the most practical way to give you a rough idea of ​​what the room temperature is. If you set the room temperature around 71 degrees Fahrenheit, you should take it as the comfort standard. 

If you feel a bit cold, it may be slightly lower than room temperature. When you feel freezing, then you know that the temperature is quite far from room temperature.

Do you know how hot weather makes you start to sweat? The answer may vary from person to person, and some may be more heat sensitive than others. If you start sweating, this could be a sign that the room is quite hot (80 degrees Fahrenheit or hotter).

How great it is that your natural senses can give you a rough idea of ​​the temperature based on how you feel under certain temperature settings.

Room temperature cannot be measured with no thermometer available. No, it’s a wrong perception! Your body can give you data on how hot or cold it is if you are willing to listen to it. Sometimes it’s best to pay attention to your senses.

Make Your Own Thermometer

Technically, you can make your thermometer if you have the right skills. If you’re going outdoor camping, you can use the water and the container to create a thermometer. It’s common knowledge that water freezes at 32 degrees Fahrenheit, so this can help you know if it’s cold or not.

There are intricate homemade thermometer designs that you can consider, like a Galileo thermometer, which is a tube using water and a floating gravity ball. 

There are many other ways to create a thermometer to give you some temperature data. Specifically, you have to prepare some materials: the following items are what you need to build a thermometer:

  • Nation
  • Rub alcohol
  • Plastic bottle
  • Red food coloring
  • Plastic straw
  • Clay

Now, let’s get started. First, put equal amounts of alcohol and water into the bottle. You need about 25% fill. After that, extract red food coloring and add it to the mixture. Mixing it by shaking the bottle is also a good idea.

About the straw, you should put it inside the bottle. Covering it with a layer of patterned clay to hold the straw tight is recommended. Remember not to open or close the straw, you can consider sealing around it.

Now, it’s time to try out this thermometer using the bottle handle. The water will rise as the heat increases. Suppose you want to measure the change in temperature. In that case, testing the model with a real thermometer and recording the water altitude at different temperatures is what you should do.

In Sum

The most practical thing to do when you don’t have a handy thermometer is to simply use your body. Using your natural senses, you can tell if the room is hot or cold. 

If you want more data than this figure, then using your smartphone to download a thermometer app would be a good idea. Making a thermometer is possible, but it’s not practical in indoor environments. We hope you already know how to check room temperature without a thermometer.

Thanks for your time!

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