Fahrenheit to Celsius Conversion Guide

How to make proper conversions from Fahrenheit to Celsius and vice-versa

As means for measuring temperatures, there are two separate scales that are used, which are called Celsius and Fahrenheit. These scales are named after their respective inventors. The Fahrenheit scale is the one that is mostly used in the US, while Celsius, which is a component of the metric system, is mostly used in Europe and the rest of the world. Both use a different scale to show temperatures, which we will illustrate with an example:

On the Fahrenheit scale, regular water reaches its boiling point at approximately 212 degrees, for which the equivalent in Celsius would be 100 degrees.

In order to convert Celsius degrees to Fahrenheit, and Fahrenheit to Celsius, some simple math is required, but this is easy to do, and anyone can do this, following a few simple steps.

There are only two steps involved for Fahrenheit to Celsius conversion:

1. Take the temperature in Fahrenheit and subtract 32 from it
2. The outcome of step 1 is then multiplied by 0.55 ( 5 divided by 9)

For example, if in New York the temperature is 80 degrees Fahrenheit, the same temperature, when converted to Celsius would be (80 – 32) x 0.55 = 26

Celsius to Fahrenheit conversion:

1. Take the temperature in Celsius and multiply it by 1.8
2. Take the outcome of step 1 and add 32 to it.

For Example, if the temperature in Barcelona, Spain would be 21 degrees Celsius , the same temperature when converted to Fahrenheit would be 21 x 1.8  + 32 = 37.8 + 32 =  69.8 degrees Fahrenheit.

As shown in the examples above it is quite simple to make temperature conversions from Fahrenheit to Celsius and vice-versa.

However, conditions may arise, when a fast result is needed, or when there is no calculator at hand. In such an event the use of an online temperature converter, may be just what you need, in order to quickly determine the temperature in Celsius or Fahrenheit. Temperature Converters are freely available on the Internet, and there are several web sites that provide them at no charge. Simply do a search on one of the popular search for the term “Temperature Converter” and you will have several free ones at your disposal.

When using an online temperature converter, all you have to do is fill out the measured temperature and select the proper scale. Clicking the submit button of the converter will immediately display the matching temperature on the scale desired.

While most English speaking countries still use the Fahrenheit scale for measuring temperature, the current trend is that more and more countries are switching over the Celsius system as a means to measure temperatures, which means that especially for residents of the United States and to a lesser extend the United Kingdom, conversions from Fahrenheit to Celsius and the other way around are becoming more and more common, which makes the ability to convert these temperatures a necessity, in order to be able to measure the correct temperature for both scales.

2 thoughts on “Fahrenheit to Celsius Conversion Guide

  1. Sam

    There is an easy way to convert the temperature form Celsius to Fahrenheit by remembering the approximate values and approximating. For example remembering that 20 degrees Celsius equals 68 degrees in Fahrenheit.

    20 degrees Celsius can be approximated to serve as the value for any temperature in the range of 63 – 73 (68 plus or minus five degrees) Fahrenheit, which would be close to 20 degrees Celsius. More specifically it would be 17, and 23 degrees Celsius respectively, which is not that far off. Thus, 20 degrees Celsius works good enough as a close approximation to any temperature in the range of 63 – 73 degrees Fahrenheit.

  2. Mary

    So how simple would you calculate minus celsius degrees, I generally do times 2 add 30 to get above degrees, its close enough, but what about the minus degrees?

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