In American films, you have probably noticed more than once that they measure the temperature there in a rather strange way. Strange for us, because we are used to the fact that we have this figure in degrees Celsius. At zero water freezes, at a hundred it boils. Everything is simple and convenient. But for a typical American, this will seem wonderful. After all, he will argue that water turns into ice at 32 degrees. But only in Fahrenheit. Of course, the temperature in Celsius and Fahrenheit will be very different. Let's see how much. Why this happened and learn how to convert Fahrenheit to Celsius.

Fahrenheit or Celsius?

Temperatures are measured in degrees Celsius (°C) all over the world. Actually, this system is named after the Swedish scientist who developed a new scale in the 18th century. First, he took the boiling point of water as zero, and freezing occurred at a hundred degrees. But then either he himself or someone else (it is not known for certain) revised the system and simply turned it upside down.

Since then, this scale has become the most common in the world, replacing various analogues. But one still firmly sat down. In the US, temperatures are still referred to in degrees Fahrenheit (°F). Other English-speaking countries and Europe abandoned this unit of measure in the last century.

Fahrenheit, water boils at 212 degrees and freezes at 32. 100°F is the temperature of the human body, and that's where it was repelled from. True, if you translate a hundred degrees Fahrenheit into Celsius, you get a little more than 37 ° C. Probably, at the time of the creation of the system, the scientist had a fever.

Objectively, his system (also named after the scientist) is not very logical, compared to Celsius, but it has the right to life.

How to convert Fahrenheit to Celsius?

You are unlikely to ever need this skill, but if you suddenly find yourself in the states or drive a purely American car, then completely. To convert from one system to another, there is a formula from Fahrenheit to Celsius. It can, of course, also be used in the opposite direction.

In order for the °F temperature to become °C, you need to subtract 32 from the original number, divide the difference by two, and add one tenth of it to the resulting number.

For example, you came across an American thermometer. You took your temperature and it was 98 degrees Fahrenheit. In Celsius, this value will be as follows: 98 - 32 = 66 / 2 = 33 + 3.3 = 36.3 ° C. Such a calculation is quite accurate, there is, of course, a small error, but for domestic needs this formula is quite acceptable.

How to convert Celsius to Fahrenheit?

Pretty simple. We multiply the temperature in Celsius by 1.8 and add 32. For example, 100 ° C will be equal to 212 ° F, that is, 100 x 1.8 + 32. In general, some thermometers are produced with both scales on both sides, which instantly solves the problem and a person does not need to think about how to convert Fahrenheit to Celsius.

In addition, there are various online converters and applications for the phone, so there should be no problems.

It is worth noting that none of the aforementioned temperature measurement scales is absolute. These are household systems, while in science, others are used for various studies, such as the Kelvin (K) scale, for example, where zero is the lowest possible temperature at which it is unrealistic to extract thermal energy from a substance (0K = -273.15 ° C = - 459.67°F).

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Initial value

Converted value

Kelvin degree Celsius degree Fahrenheit degree Rankine degree Réaumur Planck temperature

electrical conductivity

More about temperature

General information

Do you find it difficult to translate units of measurement from one language to another? Colleagues are ready to help you. Post a question to TCTerms and within a few minutes you will receive an answer.

Story

The word "temperature" arose at a time when people believed that hotter bodies contained a greater amount of a special substance - caloric than less heated ones. Therefore, temperature was perceived as the strength of a mixture of body substance and caloric. For this reason, the units of measure for the strength of alcoholic beverages and temperature are called the same - degrees.

Because the temperature is kinetic energy molecules, it is clear that it is most natural to measure it in energy units (i.e. in the SI system in joules). However, temperature measurement began long before the creation of the molecular kinetic theory, so practical scales measure temperature in conventional units - degrees.

Kelvin scale

In thermodynamics, the Kelvin scale is used, in which the temperature is measured from absolute zero (the state corresponding to the minimum theoretically possible internal energy of the body), and one kelvin is equal to 1/273.16 of the distance from absolute zero to the triple point of water (the state in which ice, water and water couples are in equilibrium. The Boltzmann constant is used to convert kelvins to energy units. Derived units are also used: kilokelvin, megakelvin, millikelvin, etc.

Celsius

In everyday life, the Celsius scale is used, in which the freezing point of water is taken as 0, and the boiling point of water is taken as 100 °. atmospheric pressure. Since the freezing and boiling points of water are not well defined, the Celsius scale is currently defined in terms of the Kelvin scale: degrees Celsius equals Kelvin, absolute zero is taken to be -273.15 °C. The Celsius scale is practically very convenient, since water is very common on our planet and our life is based on it. Zero Celsius - singular point for meteorology, since the freezing of atmospheric water changes everything significantly.

Fahrenheit

In England, and especially in the USA, the Fahrenheit scale is used. In this scale, the interval is divided by 100 degrees from the temperature of the cold winter in the city where Fahrenheit lived, to the temperature of a human body. Zero degrees Celsius is 32 degrees Fahrenheit, and a degree Fahrenheit is 5/9 degrees Celsius.

The current definition of the Fahrenheit scale is as follows: it is a temperature scale, 1 degree (1 °F) of which is equal to 1/180 of the difference between the boiling point of water and the melting of ice at atmospheric pressure, and the melting point of ice is +32 °F. The temperature on the Fahrenheit scale is related to the temperature on the Celsius scale (t ° C) by the ratio t ° C \u003d 5/9 (t ° F - 32), that is, a temperature change of 1 ° F corresponds to a change of 5/9 ° C. Proposed by G. Fahrenheit in 1724.

Reaumur scale

Proposed in 1730 by R. A. Reaumur, who described the alcohol thermometer he invented.

Unit - degree Réaumur (°R), 1 °R is equal to 1/80 of the temperature interval between the reference points - the temperature of melting ice (0 °R) and boiling water (80 °R)

1°R = 1.25°C.

At present, the scale has fallen into disuse; it has been preserved for the longest time in France, in the author's homeland.

Comparison of temperature scales

¹ Normal human body temperature is 36.6°C ±0.7°C, or 98.2°F ±1.3°F. The commonly given value of 98.6 °F is an exact Fahrenheit conversion of the 19th century German value of 37 °C. Since this value does not fall within the range of normal temperature according to modern concepts, we can say that it contains excessive (incorrect) accuracy. Some values ​​in this table have been rounded.

Comparison of Fahrenheit and Celsius scales

(oF- Fahrenheit scale, o C- Celsius scale)

To convert degrees Celsius to kelvins, use the formula T=t+T0 where T is the temperature in kelvins, t is the temperature in degrees Celsius, T 0 =273.15 kelvin. The degree Celsius is equal in size to Kelvin.

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Initial value

Converted value

Kelvin degree Celsius degree Fahrenheit degree Rankine degree Réaumur Planck temperature

Kinematic viscosity

More about temperature

General information

Do you find it difficult to translate units of measurement from one language to another? Colleagues are ready to help you. Post a question to TCTerms and within a few minutes you will receive an answer.

The most common scales for measuring temperature are Celsius and Fahrenheit. Most of all countries use the Celsius scale, which is well known and applied by all of us. The use of a different scale can only be seen in the United States of America. There are, of course, other scales of measurement, but they are used for scientific calculations, and in Everyday life missing.

Celsius is the most understandable measurement scale. It's very easy to separate it:

• 0 - Freezing point of water;
• 100 - Boiling point of water.

If you look at a large part of our life is connected with water and therefore it is very easy to draw a parallel between temperature and the Celsius scale. But it often happens that it is necessary to transfer data from one measurement scale to another. Such calculations are not difficult to make and the question: how to convert Fahrenheit to Celsius will not arise for you, you just need to know by what formula this is done.

Temperature conversion from Fahrenheit to Celsius

From given indication subtract 32, then multiply by 5 and divide by 9.

Example: 136 Fahrenheit. We translate: (136-32) * 5/9 \u003d 58, that is, 136 Fahrenheit equals 58 degrees Celsius.

Temperature conversion from Celsius to Fahrenheit

We multiply this reading by 9, divide by 5, then add 32.

Example: 100 degrees Celsius. We translate: 100 * 9 / 5 + 32 \u003d 212, that is, 100 degrees Celsius is equal to 212 Fahrenheit.