Fahrenheit to Celsius conversion: °F to °C calculator (2024)

Fahrenheit to Celsius (°F to °C) conversion calculator

Celsius to Fahrenheit (Swap units)

32°F = 0°C

Accuracy

Note: You can increase or decrease the accuracy of this answer by selecting the number of significant figures required from the options above the result.

Fahrenheit to Celsius conversion formula

Celsius = (Fahrenheit - 32) / 1.8

32 Fahrenheit to Celsius calculation

Celsius = (Fahrenheit - 32) / 1.8

Celsius = (32 - 32) / 1.8

Celsius = 0 / 1.8

Celsius = 0

Simple, quick °F to °C conversion

Fahrenheit to Celsius conversion is difficult to do in your head but a rough °F to °C conversion is actually quite easy – just take 30 from the Fahrenheit value and then half it. This should be reasonably accurate for weather temperatures.

Fahrenheit and Celsius definition

Fahrenheit and Celsius are the two most common temperature scales worldwide.

Developed by the German physicist Daniel Gabriel Fahrenheit in the early 1700s, Fahrenheit is widely used in the United States and, to a lesser extent, some other countries such as United Kingdom and Ireland. The freezing point of water is set at 32 degrees and the boiling point of water is set at 212 degrees.

Celsius, also known as Centigrade in some settings, is used in the majority of the world for temperature measurement. Created by Anders Celsius, a Swedish astronomer in the mid-1700s, the freezing point of water is denoted as 0 degrees C while the boiling point of water is 100 degrees C.

The Celsius scale is generally more globally accepted than the Fahrenheit scale. Despite this the Fahrenheit scale is still commonly used for weather forecasts, cooking, and everyday references in the United States of America.

Fahrenheit to Celsius conversion

More videos from Metric Conversions can be found here: Library of measurement unit videos

Why is converting Fahrenheit to Celsius so difficult?

Conversion between Fahrenheit to Celsius can be difficult because each of the temperature scales have different starting points and different increments between each degree.

On the Fahrenheit scale, the freezing point of water is at 32 degrees F and the boiling point of water at 212 degrees F. This means that there are 180 degrees between these two points. Celsius has the freezing point of water at 0 degrees C and the boiling point at 100 degrees C making the interval between the points 100 degrees.

The combination of these differences makes conversion between Fahrenheit to Celsius more complicated.

To convert Fahrenheit to Celsius, you must first subtract 32 from the Fahrenheit value and then divide the result by 1.8 (or 5/9). This conversion can make it difficult to mentally perform in you head without the use of a calculator or conversion chart such as the one provided on this page.

Some common Fahrenheit to Celsius conversions

-74f to c = -58.88888889°C

-35f to c = -37.22222222°C

-28f to c = -33.33333333°C

-22f to c = -30°C

-20f to c = -28.88888889°C

-12f to c = -24.44444444°C

0 fahrenheit to celsius = -17.77777778°C

0f to c = -17.77777778°C

1 fahrenheit to celsius = -17.22222222°C

2 fahrenheit to celsius = -16.66666667°C

4 fahrenheit to celsius = -15.55555556°C

10 fahrenheit to celsius = -12.22222222°C

-4f to c = -20°C

21 fahrenheit to celsius = -6.11111111°C

25 fahrenheit to celsius = -3.88888889°C

40 fahrenheit to celsius = 4.44444444°C

Common conversions from Fahrenheit to Celsius

Absolute zero: -459.67°F = -273.15°C

Parity: -40°F = -40°C

Freezing point of water: 32°F = 0°C (at 1 atmosphere of pressure)

Average human body temperature: 98.6°F = 37°C

Boiling point of water: 212°F = 100°C (at 1 atmosphere of pressure)

Fahrenheit to Celsius table

Starting value

Increment

Accuracy

Fahrenheit

Celsius

0°F

0.00000°C

1°F

0.55556°C

2°F

1.11111°C

3°F

1.66667°C

4°F

2.22222°C

6°F

3.33333°C

7°F

3.88889°C

8°F

4.44444°C

9°F

5.00000°C

10°F

5.55556°C

11°F

6.11111°C

12°F

6.66667°C

13°F

7.22222°C

14°F

7.77778°C

15°F

8.33333°C

16°F

8.88889°C

17°F

9.44444°C

18°F

10.00000°C

19°F

10.55556°C

Fahrenheit

Celsius

20°F

11.11111°C

21°F

11.66667°C

22°F

12.22222°C

23°F

12.77778°C

24°F

13.33333°C

25°F

13.88889°C

26°F

14.44444°C

27°F

15.00000°C

28°F

15.55556°C

29°F

16.11111°C

30°F

16.66667°C

31°F

17.22222°C

32°F

17.77778°C

33°F

18.33333°C

34°F

18.88889°C

35°F

19.44444°C

36°F

20.00000°C

37°F

20.55556°C

38°F

21.11111°C

39°F

21.66667°C

Fahrenheit

Celsius

40°F

22.22222°C

41°F

22.77778°C

42°F

23.33333°C

43°F

23.88889°C

44°F

24.44444°C

45°F

25.00000°C

46°F

25.55556°C

47°F

26.11111°C

48°F

26.66667°C

49°F

27.22222°C

50°F

27.77778°C

51°F

28.33333°C

52°F

28.88889°C

53°F

29.44444°C

54°F

30.00000°C

55°F

30.55556°C

56°F

31.11111°C

57°F

31.66667°C

58°F

32.22222°C

59°F

32.77778°C

Fahrenheit

Celsius

60°F

33.33333°C

61°F

33.88889°C

62°F

34.44444°C

63°F

35.00000°C

64°F

35.55556°C

65°F

36.11111°C

66°F

36.66667°C

67°F

37.22222°C

68°F

37.77778°C

69°F

38.33333°C

70°F

38.88889°C

71°F

39.44444°C

72°F

40.00000°C

73°F

40.55556°C

74°F

41.11111°C

75°F

41.66667°C

76°F

42.22222°C

77°F

42.77778°C

78°F

43.33333°C

79°F

43.88889°C

Popular links

  1. Celsius to Fahrenheit
  2. Fahrenheit to Celsius
  3. Celsius to Kelvin (°C to K)
  4. Kelvin to Celsius (K to °C)
  5. Fahrenheit to Kelvin
  6. Kelvin to Fahrenheit
Fahrenheit to Celsius conversion: °F to °C calculator (2024)

FAQs

How to convert from F to C easily? ›

Fahrenheit to Celsius, subtract 30 then divide by 2. Celsius to Fahrenheit, multiply by 2 then add 30.

How to convert Fahrenheit into Celsius in C? ›

The formula for converting Fahrenheit to Celsius is C = 5/9(F-32).

What is the formula for changing Fahrenheit to Celsius? ›

In order to convert Fahrenheit to Celsius, we use the formula, °C = (°F - 32) × 5/9, in which the value of the temperature in Fahrenheit is placed and we get the value in Celsius.

What is the formula for changing Celsius to Fahrenheit? ›

To convert Celsius to Fahrenheit, use the formula F = (9/5)C + 32.

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 the algorithm for converting Celsius to Fahrenheit? ›

The algorithm to convert from Celsius to Fahrenheit is the temperature in Celsius times 9/5, plus 32.

What is the law for converting Fahrenheit to Celsius? ›

Temperature in degrees Celsius (°C) = (Temperature in degrees Fahrenheit (°F) - 32) * 5/9.

How do you convert Celsius to Fahrenheit answer? ›

Celsius to Fahrenheit Conversion Formula

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

What is the shortcut formula for converting Celsius to Fahrenheit? ›

Double the C, subtract 10%, and add 32. For example, convert 100C to F: Double 100 (200), subtract 10% (20) and add 32 (212 F). Another example: Convert 55C to F: Double 55 (110), subtract 10% (11) and add 32 (131F).

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

Temperature Conversion Formula

The temperature conversion is easy to do: Take the °F temperature and subtract 32. Multiply this number by 5. Divide this number by 9 to obtain your answer in °C.

How to switch from F to C? ›

Follow the below steps to convert the temperature from degree Fahrenheit to degree Celsius. Step 1: First subtract 32 from the given Fahrenheit temperature. Step 2: Now multiply the difference value obtained in step 1 by 5. Step 3: Finally, divide the product value obtained in step 2 by 9.

What are the formulas for converting from Fahrenheit to Celsius and back? ›

To convert Fahrenheit to Celsius, we use the formula F = 1.8C + 32. To convert Celsius to Fahrenheit, we use the formula C = (F - 32) / 1.8. To convert Kelvin to Celsius, we use the formula C = K - 273.15.

How to convert Fahrenheit to Celsius mentally? ›

Subtract 32 from the Fahrenheit temperature. In our example, 68°F - 32 = 36. Multiply the result by 5/9 to obtain the Celsius equivalent. Applying this formula to our example, (36) * (5/9) = 20°C.

How do you convert F to C easily brainly? ›

To convert temperature in degrees Fahrenheit to Celsius, use the formula: C = (F - 32) × 5/9. To convert temperature in degrees Celsius to Fahrenheit, use the formula: F = (C × 9/5) + 32.

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