Convert Fahrenheit to Celsius
°C = (°F − 32) × 5/9. 80 °F = 26.6667 °C.
°C = (°F − 32) × 5/9
Common values, converted exactly
| degrees Fahrenheit (°F) | degrees Celsius (°C) |
|---|---|
| -40 °F | -40 °C |
| 0 °F | -17.7778 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 70 °F | 21.1111 °C |
| 72 °F | 22.2222 °C |
| 80 °F | 26.6667 °C |
| 98.6 °F | 37 °C |
| 100 °F | 37.7778 °C |
| 212 °F | 100 °C |
| 350 °F | 176.667 °C |
| 400 °F | 204.444 °C |
| 425 °F | 218.333 °C |
| 450 °F | 232.222 °C |
Related conversions
To convert Fahrenheit to Celsius, apply °C = (°F − 32) × 5/9. For example, 80 °F = 26.6667 °C.
The two scales are defined exactly against each other: °F = °C × 9/5 + 32. Unlike every other conversion here it is affine, not a simple ratio — there is an offset as well as a factor, which is why you cannot convert a temperature *difference* the same way. The scales cross at −40°, which is the same temperature on both.
Everything on this page is computed in your browser from the exact definitions above — the table is not a stored list of pre-rounded answers, and neither is the converter. For a unit not covered here, the full unit converter handles length, weight, volume, temperature and cooking measures.
How many degrees Celsius is 80 °F?
80 °F = 26.6667 °C. °C = (°F − 32) × 5/9, so any amount converts the same way — the table on this page lists the values most often looked up.
What is the formula for converting Fahrenheit to Celsius?
°C = (°F − 32) × 5/9. The two scales are defined exactly against each other: °F = °C × 9/5 + 32. Unlike every other conversion here it is affine, not a simple ratio — there is an offset as well as a factor, which is why you cannot convert a temperature *difference* the same way. The scales cross at −40°, which is the same temperature on both.
Is the Fahrenheit to Celsius conversion exact?
Yes. The Celsius and Fahrenheit scales are defined against each other exactly, so the conversion introduces no error — only the rounding you choose to apply to the answer.
How do I convert degrees Celsius back to degrees Fahrenheit?
Use the reverse of the same relationship; the celsius to fahrenheit page has its own table and converter.