Celsius to Fahrenheit Converter
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Convert °C to °F (and back) instantly. Linear formulas with exact 9/5 and 5/9 factors — handy for weather, oven settings, and travel abroad.
Celsius
°C
Fahrenheit
°F
1 °C = 33.8 °F
Convert Celsius
Quick presets
Fahrenheit
68 °F
20 °C = 68 °F
- -40 °C
- -40 °F
- 0 °C
- 32 °F
- 10 °C
- 50 °F
- 20 °C
- 68 °F
- 37 °C
- 98.6 °F
- 100 °C
- 212 °F
- 180 °C
- 356 °F
- 200 °C
- 392 °F
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Celsius vs Fahrenheit
Celsius (°C) is the everyday temperature scale in most countries and in science; Fahrenheit (°F) is still common in the United States for weather forecasts and home ovens. The scales meet familiar landmarks at standard atmospheric pressure: water freezes at 0°C / 32°F and boils at 100°C / 212°F. To convert, multiply °C by 9/5 and add 32 (or reverse: subtract 32 from °F, then multiply by 5/9).
Worked example: a European recipe that says 180°C becomes 180 × 9/5 + 32 = 356°F. US cookbooks often print 350°F for the same “moderate oven,” and dials round that to 180°C — close enough for most baking even though the exact math is 176.7°C.
Caveat: convection (fan) ovens often need a lower set temperature or shorter time than a conventional recipe states — check your manual. Also, body-temperature and weather numbers are not interchangeable without converting: a fever near 38°C is 100.4°F, not “38°F.”
Round-trip sanity check: 100°C → 212°F via ×9/5+32; reverse (212−32)×5/9 = 100°C exactly. Oven dial marks hide rounding — 350°F is 176.7°C, not 180°C. Always convert the printed recipe number, not the nearest tick on a dual-scale dial.
Common questions
My European recipe says 180°C — what oven setting do I use in the US?
180°C is 356°F. Set a US oven near 355–360°F, or use 350°F if that is the nearest dial mark (350°F is about 177°C). Fan-assisted (“convection”) ovens often need about 20°C / 25°F lower than a conventional recipe — check your oven manual.
At what temperature do Celsius and Fahrenheit show the same number?
At -40 degrees: -40°C equals -40°F. That is the only point where both scales read the same value. Round-trip any other value through both formulas to confirm your spreadsheet — offset scales are easy to invert incorrectly.
Is a fever the same in °C and °F?
No — the numbers differ. A typical adult fever threshold is about 38°C, which is 100.4°F. US thermometers often default to °F; travel thermometers may show °C.
Why does the US still use Fahrenheit for weather?
Historical convention and familiar round numbers on forecasts (e.g. “70°F” as a pleasant day). Scientific work in the US still uses Celsius or kelvin; Fahrenheit persists mainly in public weather and home cooking.