Celsius to Fahrenheit conversion °C to °F conversion is actually quite easy – just double the °C figure and add 30. This should be reasonably accurate for weather temperatures. On the Fahrenheit scale, the melting point of water is 32°F and the boiling point is 212°F (at standard atmospheric pressure). This puts the boiling and freezing points of water 180 degrees apart. Therefore, a degree on the Fahrenheit scale is 1⁄180 of the interval between the freezing point and the boiling point. On the Celsius scale, the freezing and boiling points of water are 100 degrees apart. A temperature interval of 1 °F is equal to an interval of 5⁄9 degrees Celsius.
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Fahrenheit temperature conversion formulae |
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from Fahrenheit |
to Fahrenheit |
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Celsius |
[°C] = ([°F] − 32) × 5⁄9 |
[°F] = [°C] × 9⁄5 + 32 |
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Kelvin |
[K] = ([°F] + 459.67) × 5⁄9 |
[°F] = [K] × 9⁄5 − 459.67 |
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Rankine |
[°R] = [°F] + 459.67 |
[°F] = [°R] − 459.67 |
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For temperature intervals rather than specific temperatures, |
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0 degrees Fahrenheit is equal to -17.77778 degrees Celsius:
0 °F = -17.77778 °C
The temperature T in degrees Celsius (°C) is equal to the temperature T in degrees Fahrenheit (°F) minus 32, times 5/9:
T(°C) = (T(°F) - 32) × 5/9
or
T(°C) = (T(°F) - 32) / (9/5)
or
T(°C) = (T(°F) - 32) / 1.8
Convert 68 degrees Fahrenheit to degrees Celsius:
T(°C) = (68°F - 32) × 5/9 = 20 °C
| Fahrenheit (°F) | Celsius (°C) | Description |
|---|---|---|
| -459.67 °F | -273.15 °C | absolute zero temperature |
| -50 °F | -45.56 °C | |
| -40 °F | -40.00 °C | |
| -30 °F | -34.44 °C | |
| -20 °F | -28.89 °C | |
| -10 °F | -23.33 °C | |
| 0 °F | -17.78 °C | |
| 10 °F | -12.22 °C | |
| 20 °F | -6.67 °C | |
| 30 °F | -1.11 °C | |
| 32 °F | 0 °C | freezing/melting point of water |
| 40 °F | 4.44 °C | |
| 50 °F | 10.00 °C | |
| 60 °F | 15.56 °C | |
| 70 °F | 21.11 °C | room temperature |
| 80 °F | 26.67 °C | |
| 90 °F | 32.22 °C | |
| 98.6 °F | 37 °C | average body temperature |
| 100 °F | 37.78 °C | |
| 110 °F | 43.33 °C | |
| 120 °F | 48.89 °C | |
| 130 °F | 54.44 °C | |
| 140 °F | 60.00 °C | |
| 150 °F | 65.56 °C | |
| 160 °F | 71.11 °C | |
| 170 °F | 76.67 °C | |
| 180 °F | 82.22 °C | |
| 190 °F | 87.78 °C | |
| 200 °F | 93.33 °C | |
| 212 °F | 100 °C | boiling point of water |
| 300 °F | 148.89 °C | |
| 400 °F | 204.44 °C | |
| 500 °F | 260.00 °C | |
| 600 °F | 315.56 °C | |
| 700 °F | 371.11 °C | |
| 800 °F | 426.67 °C | |
| 900 °F | 482.22 °C | |
| 1000 °F | 537.78 °C |