Convert Fahrenheit to Celsius (2024)

Convert Fahrenheit to Celsius (1)

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Please provide values below to convert Fahrenheit [°F] to Celsius [°C], or vice versa.


Fahrenheit

Definition: The Fahrenheit (symbol: °F) is a unit of temperature that was widely used prior to metrication. It is currently defined by two fixed points: the temperature at which water freezes, 32°F, and the boiling point of water, 212°F, both at sea level and standard atmospheric pressure. The interval between the freezing and boiling point is divided into 180 equal parts.

History/Origin: The Fahrenheit scale was developed based on a measurement proposed in 1724 by the German physicist Daniel Gabriel Fahrenheit. He initially based the scale on an equal ice-salt mixture, selecting the values of 30°F for the freezing point of water, and 90°F for normal body temperature. He later adjusted the scale such that the melting point of ice was 32°F and body temperature was 96°F. He chose these values to simplify the degree markings he could make on his instruments, since this difference between the temperatures allowed him to mark degree lines by bisecting the interval six times. Later, when using the freezing and boiling points of water as fixed reference points for thermometers became popular, the scale was slightly re-defined such that there would be 180 degrees separating freezing and boiling point, resulting in normal human body temperature being approximately 98°F, rather than Fahrenheit's 96°F.

Current use: Until the 1960's the Fahrenheit scale was the primary scale used in English-speaking countries. Today, most countries around the world use the Celsius temperature scale instead, many having made the change during their metrication processes (conversion to using the metric system of units). However, the Fahrenheit scale is still used as the official temperature scale in a number of countries, including the United States (as well as its unincorporated territories), the Bahamas, Belize, the Cayman Islands, and a few others.

Celsius

Definition: The Celsius (symbol: °C) is an SI (International System of Units) derived unit of temperature. It is defined based on the SI unit of temperature, the kelvin. The Celsius and Kelvin scales are precisely related, with a one-degree change in Celsius being equal to a one degree-change in kelvin. The kelvin (and thus Celsius) is defined based on the Boltzmann constant, k, which equals 1.380649 × 10-23 when expressed in the unit J·K-1, a unit equivalent to kg·m2·s-2·K-1. The kilogram, meter, and second, are defined based on Planck's constant, h, the speed of light, c, and cesium frequency, ΔνCs.

History/origin: From 1743 until 1954, the Celsius scale was based on 0°C for the freezing point of water and 100 °C for the boiling point of water, both at a pressure of one standard atmosphere, using mercury as the working material. This was not always the case, and originally 0°C was defined as the boiling point of water and 100°C was defined as the melting point of snow. Celsius as a unit and a scale was not widely used until this original definition was inverted. In 1954, the unit, "degree Celsius," as well as the Celsius scale were again re-defined to instead be based on absolute zero (-273.15 °C) and the triple point of VSMOW (specially purified water). This is the definition that was used up until 2019, when the kelvin was redefined based on the definitions of the second, meter, and kilogram.

Current use: The Celsius scale replaced the Fahrenheit scale in most countries in the mid to late 20th century. Almost all countries around the world use this scale, except for those in which the metric system has not been adopted, such as the United States. Even in countries like the United States however, Celsius is widely used within the scientific community—it just is not widely used in everyday temperature references.

Fahrenheit to Celsius Conversion Table

Fahrenheit [°F]Celsius [°C]
0.01 °F-17.7722222222 °C
0.1 °F-17.7222222222 °C
1 °F-17.2222222222 °C
2 °F-16.6666666667 °C
3 °F-16.1111111111 °C
5 °F-15 °C
10 °F-12.2222222222 °C
20 °F-6.6666666667 °C
50 °F10 °C
100 °F37.7777777778 °C
1000 °F537.7777777778 °C

How to Convert Fahrenheit to Celsius

C =
5
9
(F - 32)
F =
9
5
C + 32

Example: convert 50 °F to: °C
50 °F = (50 - 32) × 5/9 = 10 °C

Popular Temperature Unit Conversions

Celsius to Fahrenheit

Fahrenheit to Celsius

Celsius to Kelvin

Kelvin to Celsius

Fahrenheit to Kelvin

Kelvin to Fahrenheit


Convert Fahrenheit to Other Temperature Units

Fahrenheit to Kelvin

Fahrenheit to Rankine

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Fahrenheit to Triple Point Of Water

Convert Fahrenheit to Celsius (2024)

FAQs

How to convert from F to C easily? ›

After you know the formula, it is easy to convert Fahrenheit to Celsius with these three steps.
  1. Subtract 32 from the Fahrenheit temperature.
  2. Multiply this number by five.
  3. Divide the result by nine.
Jul 18, 2022

What is the formula for Fahrenheit to Celsius? ›

Fahrenheit to Celsius conversion formula represents the conversion of Fahrenheit degrees to Celsius degrees on temperature scale. The formula used to convert Fahrenheit to Celsius is: °C = 5/9(°F – 32).

How to convert Celsius to Fahrenheit hack? ›

If you find yourself needing to quickly convert Celsius to Fahrenheit, here is a simple trick you can use: multiply the temperature in degrees Celsius by 2, and then add 30 to get the (estimated) temperature in degrees Fahrenheit.

What is the trick to go from F to C? ›

So if you are like me, and are familiar with temperature in Fahrenheit, just remember how to get C to F: Double it and add 30. If you are more familiar with Celsius, you more often only need to convert F to C. So just remember: Take away 30 and halve it.

What is an example of converting C to F? ›

For example, let us convert 20° Celsius to Fahrenheit: °F = 20 × (9/5) + 32 = 36 + 32 = 68°F. Therefore, 20° Celsius is equal to 68° Fahrenheit (20°C = 68°F).

What is the code for converting Fahrenheit to Celsius? ›

To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit temperature and then multiply the result by 5/9. let fahrenheit = 285; let celsius = (fahrenheit - 32) * 5/9; console. log(celsius);

What is the quickest way to convert Celsius to Fahrenheit? ›

Celsius to Fahrenheit, multiply by 2 then add 30.

How do you mentally convert F to C? ›

Looking to convert from Fahrenheit to Celsius? Estimate by working backwards using inverse operations! Take the temperature in Fahrenheit, subtract 30, and then divide the answer by 2.

What is the formula to change C to F? ›

The conversion formula for a temperature that is expressed on the Celsius (°C) scale to its Fahrenheit (°F) formula is given below: °F = (9/5 × °C) + 32.

What is the easiest way to convert Fahrenheit to Celsius? ›

Start with the temperature in Fahrenheit (e.g., 100 degrees). Subtract 32 from this figure (e.g., 100 - 32 = 68). Divide your answer by 1.8 (e.g., 68 / 1.8 = 37.78)

How do you convert Celsius to Fahrenheit coding? ›

The formula to convert Celsius (C) to Fahrenheit (F) is: F = (C * 9/5) + 32. 2. What data types should I use for the variables in a Celsius to Fahrenheit conversion program? You can use float or double data types for the Celsius and Fahrenheit variables to handle decimal values accurately.

How to convert C to F in code? ›

JAVA
  1. public class temperature.
  2. {
  3. public static void main (String args[])
  4. { float Fahrenheit, Celsius;
  5. Celsius= 13;
  6. Fahrenheit =((Celsius*9)/5)+32;
  7. System.out.println("Temperature in Fahrenheit is: "+Fahrenheit);
  8. }}

How do you convert the following C into F? ›

Multiply the °C temperature by 1.8. Add 32 to this number. This is the answer in °F.

References

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