Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit instantly, plus Kelvin too. Type in any box and all three scales update at once. This C to F converter also handles Fahrenheit to Celsius the other way, and includes cooking temperatures, a body temperature reference, and the conversion formula.
°F = (0 × 9/5) + 32 = 32°F
Oven and cooking temperatures
Converting metric baking recipes to Fahrenheit for US ovens.
| Celsius (°C) | Fahrenheit (°F) | Used for |
|---|---|---|
| 120°C | 248°F | Low and slow roasting, meringues |
| 150°C | 302°F | Slow cooking, cheesecake |
| 160°C | 320°F | Cookies, biscuits, delicate pastries |
| 180°C | 356°F | Cakes, banana bread, muffins |
| 190°C | 374°F | Victoria sponge, cupcakes |
| 200°C | 392°F | Roast vegetables, pizza bases |
| 220°C | 428°F | Crispy roast potatoes, pies |
| 240°C | 464°F | Pizza (high heat), searing |
Body temperature and weather reference
Common Celsius values you encounter in daily life, converted to Fahrenheit.
| Celsius (°C) | Fahrenheit (°F) | Meaning |
|---|---|---|
| -10°C | 14°F | Cold winter day, frost on roads |
| 0°C | 32°F | Freezing point of water |
| 10°C | 50°F | Cool autumn day, jacket weather |
| 20°C | 68°F | Comfortable room temperature |
| 30°C | 86°F | Hot summer day, beach weather |
| 37°C | 98.6°F | Normal human body temperature |
| 38°C | 100.4°F | Low fever threshold |
| 39°C | 102.2°F | High fever, see a doctor |
| 40°C | 104°F | Extreme heat / dangerous fever |
| 100°C | 212°F | Boiling point of water (sea level) |
What this converter does
All 3 scales
Celsius, Fahrenheit, and Kelvin all update at the same time.
C to F and F to C
Input from Fahrenheit or Kelvin directly. Every other scale follows along.
Formula shown
See the live celsius to fahrenheit calculation so you can do it yourself next time.
Quick presets
Tap freezing, body temp, boiling, and common oven temperatures instantly.
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Mobile friendly
Large tap targets and a clean layout that works on any screen size.
When you need to convert temperature
Cooking from metric recipes
Most UK, European, and Australian recipes use Celsius oven temperatures. Convert 180°C to 356°F for your US oven.
Travel weather forecasts
Weather apps in other countries show Celsius. Know instantly if 28°C means you need sunscreen (it does: 82°F).
Monitoring a fever
37°C is normal. 38°C is a mild fever (100.4°F). 39°C is high (102.2°F). Convert quickly when reading a clinical thermometer.
Science homework
Chemistry and physics use Celsius and Kelvin. Convert between all three scales for assignments and lab reports.
Coffee and tea brewing
Ideal coffee extraction is 90 to 96°C (194 to 205°F). Green tea brews best at 80°C (176°F). Boiling at 100°C (212°F) is too hot.
Car and engine specs
Engine coolant temperature, tire pressure specs, and storage guidelines often mix metric and imperial units.
About Celsius and Fahrenheit
The Celsius to Fahrenheit formula
The celsius to fahrenheit formula is: °F = (°C x 9/5) + 32. You can also write the 9/5 fraction as the decimal 1.8, so the formula becomes °F = (°C x 1.8) + 32. To go the other direction, the fahrenheit to celsius formula is: °C = (°F - 32) x 5/9. The reason both formulas look a little odd is that the two scales have different zero points and different degree sizes. One Celsius degree is larger than one Fahrenheit degree, so going from 0°C to 1°C is the same size of change as going from 32°F to 33.8°F.
How to convert C to F step by step
To do a C to F conversion by hand, follow three quick steps. First, take your Celsius number and multiply it by 1.8. Second, add 32 to that result. Third, read off the answer in degrees Fahrenheit. For example, to convert 25°C to Fahrenheit: 25 x 1.8 = 45, then 45 + 32 = 77, so 25°C equals 77°F. If you only need a rough estimate and have no calculator, double the Celsius value and add 30. That shortcut puts 25°C at about 80°F, which is close enough for checking the weather but not for cooking or medical readings.
Common Celsius to Fahrenheit conversions
A handful of conversions come up far more often than the rest. Many people search for 30 c to fahrenheit, which is a hot 86°F summer day. The value 40 c to f is another popular one: 40°C equals 104°F, which is both extreme heat outdoors and a dangerously high fever for a person. For baking, 180 c to f is the single most searched oven temperature, landing at 356°F, while 200 c to f works out to 392°F for roasting. Whether you type "centigrade to fahrenheit" or "celsius to f", the math is identical, and the converter above handles every value the moment you type it.
C to F quick reference
Use this short list when you just need the answer fast. 0°C is 32°F (water freezes). 10°C is 50°F (cool jacket weather). 20°C is 68°F (comfortable room temperature). 25°C is 77°F. 30°C is 86°F. 37°C is 98.6°F (normal body temperature). 40°C is 104°F. 100°C is 212°F (water boils at sea level). For ovens, 160°C is 320°F, 180°C is 356°F, 200°C is 392°F, and 220°C is 428°F. Bookmark this page so the full C to F chart is always one tap away.
180 c to f and other oven temperatures
Recipes from the UK, Europe, and Australia almost always list oven temperatures in Celsius, which is why 180 celsius to fahrenheit is such a common search. The exact conversion of 180°C is 356°F, but most US ovens only offer settings in 25-degree steps, so you would set the dial to 350°F in practice. The same applies further up the scale: 200°C (392°F) rounds to 400°F and 220°C (428°F) rounds to 425°F. The small rounding difference rarely matters for home baking, though fan or convection ovens usually run about 20°C cooler than the recipe states.
Fahrenheit to Celsius: the reverse conversion
Going from Fahrenheit to Celsius works the same way in reverse. Subtract 32 from the Fahrenheit value, then multiply by 5/9 (or divide by 1.8). For an f to c example, 98.6°F becomes 98.6 - 32 = 66.6, then 66.6 x 5/9 = 37, so 98.6°F equals 37°C. Common f to c results include 32°F as 0°C, 50°F as 10°C, 70°F as about 21°C, and 212°F as 100°C. The converter at the top of this page runs both directions, so you can switch between celsius to fahrenheit and fahrenheit to celsius without reloading.
Centigrade vs Celsius: are they the same?
Yes, centigrade and Celsius refer to the exact same temperature scale, so "centigrade to fahrenheit" and "celsius to fahrenheit" mean the same thing. The word centigrade comes from the Latin for "hundred steps", describing the 100 degrees between the freezing and boiling points of water. The scale was officially renamed Celsius in 1948 to honor its inventor and to avoid confusion with a French unit of angle measurement that was also called the centigrade. Older textbooks and many everyday speakers still say centigrade.
Who invented Celsius?
Anders Celsius, a Swedish astronomer, proposed his temperature scale in 1742. His original version had 0 at boiling and 100 at freezing, which was later reversed to the version we use today. The scale was called centigrade for most of its history and was officially renamed Celsius in 1948 to honor its inventor.
Who invented Fahrenheit?
Daniel Gabriel Fahrenheit, a German physicist, developed his scale in 1724 using three reference points: the freezing point of a saltwater mixture (0°F), the freezing point of pure water (32°F), and average human body temperature (approximately 96°F in his original scale, now established at 98.6°F). His mercury thermometer was the first practical clinical instrument.
Why does -40 equal -40 in both scales?
At -40 degrees, both scales happen to give the same reading. This is because the formula crosses this point mathematically: (°F - 32) x 5/9 = °F only when the value is -40. It has no practical significance in daily life but comes up often in trivia and physics problems.
Celsius vs Fahrenheit: which is better?
Celsius is better for scientific work because 0 and 100 mark water's phase transitions, which are natural reference points. Fahrenheit is arguably more intuitive for describing daily weather because the scale from 0 to 100°F covers most of the human comfort range, letting people feel whether a number is cold (20°F), comfortable (72°F), or hot (95°F) without mental arithmetic. Neither is objectively better. Pick the one your context requires.
Multiply the Celsius value by 9/5 (or 1.8), then add 32. For example, 25°C x 1.8 = 45, plus 32 = 77°F. Our converter does this instantly for any value.
37°C equals 98.6°F. This is normal human body temperature. A fever typically starts around 38°C (100.4°F). Above 39°C (102.2°F) is considered high fever.
100°C equals 212°F. This is the boiling point of water at sea level. At high altitudes, water boils at a lower temperature because atmospheric pressure is reduced.
The scales meet at -40 degrees. So -40°C equals exactly -40°F. This is the only point where both scales give the same number.
0°C equals 32°F. This is the freezing point of water. At this temperature, water transitions from liquid to solid (ice).
Double the Celsius value and add 30. Example: 20°C. Double is 40, plus 30 is 70°F. The exact answer is 68°F. The shortcut is off by a few degrees but good for quick estimates.
180°C equals 356°F. This is a common oven temperature for baking cakes and bread. Many recipes from metric countries (UK, Europe, Australia) use 180°C which US ovens need set to about 350°F.
200°C equals 392°F. This is a standard roasting temperature for vegetables and meats in metric recipes.
The US adopted Fahrenheit from the German physicist Daniel Gabriel Fahrenheit, who invented the mercury thermometer in 1714. The Fahrenheit scale was in common use before the metric system was standardized. The US never officially switched, while most other countries adopted Celsius in the 19th and 20th centuries.
40°C equals 104°F. As air temperature, this is extreme heat. As body temperature, 40°C is a high fever that requires medical attention. At 41°C (105.8°F), the risk of heat stroke and organ damage rises significantly.
180°C equals 356°F using the formula (180 x 1.8) + 32. It is the most common oven setting in metric recipes for cakes, muffins, and bread. On a US oven, you would normally set the dial to 350°F since most ovens move in 25-degree steps.
40 c to f gives 104°F. Multiply 40 by 1.8 to get 72, then add 32 to reach 104. As a weather reading this is dangerously hot, and as a body temperature it is a high fever that needs prompt medical care.
30°C equals 86°F. That is a hot summer day, good for the beach but warm enough to stay hydrated and seek shade. The math is 30 x 1.8 = 54, then 54 + 32 = 86.
Yes. Centigrade and Celsius are two names for the identical temperature scale, so a "centigrade to fahrenheit" conversion is exactly the same as a "celsius to fahrenheit" conversion. The scale was officially renamed Celsius in 1948, though many people still say centigrade.
Subtract 32 from the Fahrenheit value, then multiply by 5/9 (or divide by 1.8). For example, 98.6°F becomes 66.6 after subtracting 32, then 66.6 x 5/9 = 37°C. The converter on this page handles both C to F and F to C directions.
The correct spellings are "Celsius" and "Fahrenheit". Common misspellings such as "celcius to farenheit" are searched often, but the proper words are Celsius (after Anders Celsius) and Fahrenheit (after Daniel Gabriel Fahrenheit). Whichever spelling you use, the conversion math stays the same.