Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit instantly. °F = °C × 9/5 + 32. Formula, table and the one temperature where both scales agree.
Written by Rahman · Last reviewed
Quick answer
To convert Celsius to Fahrenheit, multiply by 9/5 (1.8) and add 32: °F = °C × 1.8 + 32. So 0°C is 32°F (freezing), 37°C is 98.6°F (body temperature), and 100°C is 212°F (boiling, at sea level).
C to F conversion table
| C | F |
|---|---|
| 1 C | 33.8 F |
| 2 C | 35.6 F |
| 3 C | 37.4 F |
| 4 C | 39.2 F |
| 5 C | 41 F |
| 6 C | 42.8 F |
| 7 C | 44.6 F |
| 8 C | 46.4 F |
| 9 C | 48.2 F |
| 10 C | 50 F |
| 20 C | 68 F |
| 30 C | 86 F |
| 40 C | 104 F |
| 50 C | 122 F |
| 60 C | 140 F |
| 70 C | 158 F |
| 80 C | 176 F |
| 90 C | 194 F |
| 100 C | 212 F |
| 250 C | 482 F |
| 500 C | 932 F |
| 1000 C | 1832 F |
How to convert C to F
Unlike most conversions on this site, this one is not a simple multiplication: it has an offset, because the two scales set their zero points differently. Celsius puts 0° at the freezing point of water; Fahrenheit's original 1724 definition put 0° at the coldest temperature Daniel Fahrenheit could reliably reproduce in his lab (a brine mixture), which is why the formula needs both a multiply and an add.
There is exactly one temperature where the two scales agree: −40°C equals −40°F. It is the crossing point of the linear equation relating them, and it is cold enough that the coincidence is mostly a trivia fact rather than something anyone experiences. But it is a genuinely useful way to sanity-check that a conversion tool is applying the offset correctly, since a tool that only multiplies (forgetting the +32) would get every value wrong except this one.
Frequently Asked Questions
What is 20°C in Fahrenheit?
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20°C is 68°F, a mild, room-temperature reading.
Why isn't this conversion a simple multiplication like the others on this site?
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Celsius and Fahrenheit have different zero points as well as different-sized degrees, so the formula needs both a multiplication and an addition (or subtraction, in reverse) rather than a single factor.