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

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.

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

5°F

2.77778°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

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

FAQs

How do you convert F to C easily? ›

If you want to convert Fahrenheit to Celsius, do the opposite: subtract 30 from the temperature in degrees Fahrenheit, and then divide by 2 to get the temperature in degrees Celsius. = 27 °C (In reality, 84 °F is equivalent to 28.89 °C—again, that's a pretty close estimate!).

How do you convert 1f to 1c? ›

Fahrenheit °F to Celsius °C Formula

°C equals °F minus 32, divided by 9/5. Alternatively, since 9/5 = 1.8 we can say °C equals °F minus 32, divided by 1.8.

How do you convert from Fahrenheit F to Celsius C use the conversion formula C? ›

The formula for converting Fahrenheit to Celsius is C = 5/9(F-32). Fahrenheit and Celsius are the same at -40°. At ordinary temperatures, Fahrenheit is a larger number than Celsius.

How to convert F to C examples? ›

For example, if we need to convert 40 degrees Fahrenheit to Celsius, we will substitute the value of Fahrenheit in the formula to get, °C = (40° - 32) × 5/9 = 4.4°C. This means, 40° F = 4.4°C.

What is the quick and dirty way to convert Celsius to Fahrenheit? ›

Converting Celsius to Fahrenheit — The Quick and Dirty Way
  1. °C x 9/5 + 32 = °F.
  2. Multiply by 9: 16 x 9 = 144.
  3. Divide by 5: 144/5 = 28.8.
  4. Add 32: 28.8 + 32 = 60.8.
Mar 6, 2015

How to convert Fahrenheit to Celsius hack? ›

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 correct formula in converting Celsius C to Fahrenheit 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.

How to convert C to F in code? ›

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 do you convert F to C without a calculator? ›

Super-easy formula
  1. Fahrenheit to Celsius, subtract 30 then divide by 2.
  2. Celsius to Fahrenheit, multiply by 2 then add 30.
Dec 22, 2022

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 algorithm for converting Fahrenheit to Celsius? ›

The formula used to convert Fahrenheit to Celsius is: °C = 5/9(°F – 32).

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

To convert temperatures in degrees Fahrenheit to Celsius, subtract 32 and multiply by . 5556 (or 5/9). To convert temperatures in degrees Celsius to Fahrenheit, multiply by 1.8 (or 9/5) and add 32.

How do you convert Fahrenheit to Celsius on a calculator? ›

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

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

Super-easy formula
  1. Fahrenheit to Celsius, subtract 30 then divide by 2.
  2. Celsius to Fahrenheit, multiply by 2 then add 30.
Dec 22, 2022

What is the formula to change C to F? ›

How Do You Convert Celsius to Fahrenheit? To convert temperatures in degrees Celsius to Fahrenheit, multiply by 1.8 (or 9/5) and add 32.

How to convert C to F with example? ›

Examples of C o to F o
  1. 0 × 1.8 + 32 = 0 + 32 = 32. 0 degrees Celsius converts into 32 degrees Fahrenheit. ...
  2. 25 × 1.8 + 32 = 45 + 32 = 77. 25 degrees Celsius is equal to 77 degrees Fahrenheit. ...
  3. 150 × 1.8 + 32 = 270 + 32 = 302. 150 degrees Celsius is equal to 302 degrees Fahrenheit.

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