Fahrenheit to Celsius Converter
Convert degrees Fahrenheit (°F) to degrees Celsius (°C), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a temperature, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 °F = 255.927777778 K
- 255.927777778 K = -17.2222222222 °C
How to convert fahrenheit to celsius
These scales have different zero points as well as different degree sizes, so the conversion adds or subtracts an offset as well as multiplying.
Worked example:
100 °F = 310.927777778 K 310.927777778 K = 37.7777777778 °C
Fahrenheit to celsius table
| Fahrenheit | Celsius |
|---|---|
| -40 °F | -40 °C |
| -20 °F | -28.8888888889 °C |
| -10 °F | -23.3333333333 °C |
| 0 °F | -17.7777777778 °C |
| 5 °F | -15 °C |
| 10 °F | -12.2222222222 °C |
| 15 °F | -9.44444444444 °C |
| 20 °F | -6.66666666667 °C |
| 25 °F | -3.88888888889 °C |
| 30 °F | -1.11111111111 °C |
| 32 °F | 0 °C |
| 35 °F | 1.66666666667 °C |
| 37 °F | 2.77777777778 °C |
| 40 °F | 4.44444444444 °C |
| 45 °F | 7.22222222222 °C |
| 50 °F | 10 °C |
| 55 °F | 12.7777777778 °C |
| 60 °F | 15.5555555556 °C |
| 65 °F | 18.3333333333 °C |
| 68 °F | 20 °C |
| 70 °F | 21.1111111111 °C |
| 72 °F | 22.2222222222 °C |
| 73 °F | 22.7777777778 °C |
| 75 °F | 23.8888888889 °C |
| 80 °F | 26.6666666667 °C |
| 85 °F | 29.4444444444 °C |
| 90 °F | 32.2222222222 °C |
| 95 °F | 35 °C |
| 100 °F | 37.7777777778 °C |
| 101 °F | 38.3333333333 °C |
| 102 °F | 38.8888888889 °C |
| 103 °F | 39.4444444444 °C |
| 104 °F | 40 °C |
| 105 °F | 40.5555555556 °C |
| 120 °F | 48.8888888889 °C |
| 150 °F | 65.5555555556 °C |
| 200 °F | 93.3333333333 °C |
| 250 °F | 121.111111111 °C |
| 300 °F | 148.888888889 °C |
| 350 °F | 176.666666667 °C |
| 400 °F | 204.444444444 °C |
About the units
- Fahrenheit (°F)
- Degrees Fahrenheit, a US customary unit. Definition: NIST SP 811 Appendix B.8 (T/K = (t/°F + 459.67)/1.8).
- Celsius (°C)
- Degrees Celsius, a metric unit. Definition: BIPM SI Brochure (t/°C = T/K − 273.15).