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What is the Difference between Fahrenheit and Celsius?

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  • Written By: Ken Black
  • Edited By: Bronwyn Harris
  • Last Modified Date: 18 March 2013
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The main difference between Fahrenheit and Celsius is their relative values for both the freezing points and boiling points. This causes nearly all other temperature points on the thermometer to be different as well. Celsius is considered a world standard because of its ease of use, but a significant number of countries still operate on the Fahrenheit system for many applications, such as weather information and cooking. It should be noted that the reference to freezing and boiling is for water.

Fahrenheit and Celsius both are easily understandable, but the freezing and boiling points are harder to remember for Fahrenheit, simply because they are so awkwardly placed on the scale. This is the main reason the Celsius scale has come into widespread use. Celsius is also more in line with the metric system, which is used in official scientific measurements, as its most important points are divisible by 10.

The freezing points on these scales are generally better known than the boiling points, at least to the common person. This is because both are very important weather-related points. On the Celsius scale, the freezing point is listed as 0°. The freezing point on the Fahrenheit scale is 32°.

Likewise, the boiling points are also different, with the easier number being 100°, which is the boiling point on the Celsius scale. On the Fahrenheit scale, the boiling point is 212°. Given the rounded number for Celsius, it can help make many calculations much easier when considering the boiling point.

While the advantages often favor the Celsius system, there is a major disadvantage to the Celsius scale. The actual temperature variation between natural number points is greater on the Celsius system, simply because there are fewer natural number points between freezing and boiling. Therefore, to be more exact in the actual temperature, decimals and fractions become more important in the Celsius system.

Converting Fahrenheit and Celsius to each respective scale requires the use of a simple mathematical formula. To convert Celsius to Fahrenheit, a person can add 32 to the Celsius temperature and multiply that by 1.8. To convert Fahrenheit to Celsius, she can subtract 32 and divide by 1.8. There are also a number of calculators online easily found by doing a search that will automatically convert one temperature to the other.

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anon135928
Post 4

is fahrenheit scale a nonlinear graph and why is it interfering with Celsius at some values?

FernValley
Post 3

@spasiba, as an American currently living in Europe, I also notice that Celsius temperatures just feel much colder. When I first read on a thermometer that the temperature was 12 degrees, I worried that it was very cold until I realized, after using a fahrenheit and celsius converter, that 12 degrees Celsius is actually nearly 55 degrees Fahrenheit. Likewise, using your example, 90 degrees Fahrenheit sounds much warmer than 30 degrees Celsius. The relationship between Fahrenheit and Celsius is complicated to remember, and the Fahrenheit and Celsius formula is also complicated, for me at least, to memorize.

spasiba
Post 1

For the average person, it gets a little complicated if you are using Fahrenheit for example and you try to convert it into Celsius.

You just do not have a good sense of what the numbers mean.

I know that 90 degrees Fahrenheit is hot, even a bit uncomfortably hot, but I would not have a good feel for the temperature if somebody tells me it is 30 degrees Celsius. Without actually doing the calculation I would not be sure how hot 30 degrees really is.

I am sure the same holds true the other way around. It all depends on what we are accustomed to.

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