Fahrenheit to Celsius (°F → °C)
Formula
°C = (°F − 32) ÷ 1.8Step-by-step
°C = (0 − 32) ÷ 1.8°C = -32 ÷ 1.8°C = -17.77777777777778Conversion Table
| °F | °C |
|---|---|
| 0 | -17.778 |
| 1.0000 | -17.222 |
| 2.0000 | -16.667 |
| 3.0000 | -16.111 |
| 4.0000 | -15.556 |
| 5.0000 | -15.000 |
| 6.0000 | -14.444 |
| 7.0000 | -13.889 |
| 8.0000 | -13.333 |
| 9.0000 | -12.778 |
| 10.000 | -12.222 |
| 11.000 | -11.667 |
| 12.000 | -11.111 |
| 13.000 | -10.556 |
| 14.000 | -10.000 |
| 15.000 | -9.4444 |
| 16.000 | -8.8889 |
| 17.000 | -8.3333 |
| 18.000 | -7.7778 |
| 19.000 | -7.2222 |
| °F | °C |
|---|---|
| 20.000 | -6.6667 |
| 21.000 | -6.1111 |
| 22.000 | -5.5556 |
| 23.000 | -5.0000 |
| 24.000 | -4.4444 |
| 25.000 | -3.8889 |
| 26.000 | -3.3333 |
| 27.000 | -2.7778 |
| 28.000 | -2.2222 |
| 29.000 | -1.6667 |
| 30.000 | -1.1111 |
| 31.000 | -0.55556 |
| 32.000 | 0.000000000000056843 |
| 33.000 | 0.55556 |
| 34.000 | 1.1111 |
| 35.000 | 1.6667 |
| 36.000 | 2.2222 |
| 37.000 | 2.7778 |
| 38.000 | 3.3333 |
| 39.000 | 3.8889 |
| °F | °C |
|---|---|
| 40.000 | 4.4444 |
| 41.000 | 5.0000 |
| 42.000 | 5.5556 |
| 43.000 | 6.1111 |
| 44.000 | 6.6667 |
| 45.000 | 7.2222 |
| 46.000 | 7.7778 |
| 47.000 | 8.3333 |
| 48.000 | 8.8889 |
| 49.000 | 9.4444 |
| 50.000 | 10.000 |
| 51.000 | 10.556 |
| 52.000 | 11.111 |
| 53.000 | 11.667 |
| 54.000 | 12.222 |
| 55.000 | 12.778 |
| 56.000 | 13.333 |
| 57.000 | 13.889 |
| 58.000 | 14.444 |
| 59.000 | 15.000 |
| °F | °C |
|---|---|
| 60.000 | 15.556 |
| 61.000 | 16.111 |
| 62.000 | 16.667 |
| 63.000 | 17.222 |
| 64.000 | 17.778 |
| 65.000 | 18.333 |
| 66.000 | 18.889 |
| 67.000 | 19.444 |
| 68.000 | 20.000 |
| 69.000 | 20.556 |
| 70.000 | 21.111 |
| 71.000 | 21.667 |
| 72.000 | 22.222 |
| 73.000 | 22.778 |
| 74.000 | 23.333 |
| 75.000 | 23.889 |
| 76.000 | 24.444 |
| 77.000 | 25.000 |
| 78.000 | 25.556 |
| 79.000 | 26.111 |
Fahrenheit to Celsius Conversion
Converting Fahrenheit (°F) to Celsius (°C) is a common temperature conversion. 1 °F equals -17.222222 °C. For example, 100 °F is equal to 37.777778 °C.
Quick Mental Math: Fahrenheit to Celsius
Subtract 32, then halve the result and add 10% for a fast estimate back to Celsius.
Why is converting Fahrenheit to Celsius tricky?
You cannot convert by division alone because Fahrenheit starts at a different zero than Celsius.
Quick Reference Values
0 °F = -17.78 °C. 32 °F = 0 °C. 50 °F = 10 °C. 68 °F = 20 °C. 77 °F = 25 °C. 86 °F = 30 °C. 98.6 °F = 37 °C. 212 °F = 100 °C.
What is Fahrenheit?
Fahrenheit (°F) is a unit of temperature. Fahrenheit is a temperature scale where water freezes at 32°F and boils at 212°F under standard atmospheric pressure. It defines temperature units based on intervals of 1/180th between these points. One degree Fahrenheit equals 5/9 of a kelvin or Celsius degree, making precise conversions essential in scientific and engineering contexts [cgpm-resolutions]. The Fahrenheit scale was created by Daniel Gabriel Fahrenheit in 1724 to provide a practical temperature measurement for weather and industrial processes. It was adopted widely in English-speaking countries and influenced early thermometry standards [nist-sp-811]. Fahrenheit remains the primary temperature scale in the United States and some Caribbean nations for everyday use. Scientific and international standards favor Celsius or kelvin, but Fahrenheit persists in HVAC, weather forecasting, and cooking within these regions [nist-sp-811].
What is Celsius?
Celsius (°C) is a unit of temperature. Celsius is a temperature scale where 0 °C is the freezing point and 100 °C is the boiling point of water at standard atmospheric pressure. It is defined by the International System of Units (SI) and related to the Kelvin scale by the formula °C = K − 273.15 [cgpm-resolutions]. The Celsius scale was developed by Anders Celsius in 1742. It became internationally accepted and officially incorporated into the SI temperature scales by the CGPM in 1948 for scientific and everyday temperature measurement [cgpm-resolutions]. Celsius is the standard temperature unit for most countries worldwide, including Canada, Europe, and Australia. It is used in weather forecasts, scientific research, and industrial processes as endorsed by ISO and BIPM [bipm-si-brochure].
Common Misspellings
People often search for this conversion using these alternate spellings: fahranheit, farenheit, fahrentheit, farhenheit, celcius, celsious, celcius, celsius degree. All of these refer to the Fahrenheit to Celsius conversion.
When do Fahrenheit and Celsius read the same?
The Fahrenheit and Celsius scales intersect at -40 degrees. That is, -40 °F is exactly equal to -40 °C. This is the only point where both scales show the same numerical value.