Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit instantly — type a value below and get the result right away, no page reload.
Formula
To convert Celsius to Fahrenheit, multiply by 9/5 and add 32. To go the other way, subtract 32 first and multiply by 5/9.
Common Celsius to Fahrenheit conversions
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Why this conversion gets searched so often
Most of the world uses Celsius for weather and cooking, while the United States uses Fahrenheit. This makes Celsius-to-Fahrenheit one of the most searched conversions — for travel, weather forecasts, and recipes.
How to convert Celsius to Fahrenheit by hand
A quick mental estimate is to double the Celsius value and add 30. For 20°C: doubling gives 40, plus 30 gives 70°F — close to the exact value of 68°F. This shortcut is handy for a fast read on weather forecasts while traveling, though for cooking temperatures or anything precise, the exact formula (multiply by 9/5 and add 32) is worth using instead, since the gap between the estimate and the exact value grows at higher temperatures.
Where this conversion matters in real life
Oven temperatures are one of the most common places this trips people up: a recipe written for a Fahrenheit oven set to 350°F needs to be set to roughly 177°C on a Celsius oven, and getting this wrong by using the wrong scale entirely (setting a Celsius oven to "350" when it means Fahrenheit) can ruin a dish completely. Weather apps and forecasts switch between the two scales depending on region, and body temperature readings also differ — a healthy human body temperature of 98.6°F is 37°C, so a thermometer reading from a different country's scale can look alarming if you're not used to converting it.
Frequently asked questions
What is 0°C in Fahrenheit?
0°C equals 32°F. This is the freezing point of water, and it's one of the two fixed reference points (along with 100°C = 212°F, the boiling point) that the whole Celsius-Fahrenheit relationship is built around.
What is normal body temperature in both scales?
Normal human body temperature is commonly cited as 37°C, which equals 98.6°F. Day-to-day variation of half a degree or so in either direction is still considered normal.
Is there a quick way to convert Celsius to Fahrenheit in my head?
Double the Celsius number and add 30 for a fast estimate. It's accurate enough for everyday situations like checking the weather, though it drifts further from the exact answer at very high or very low temperatures.
How do I convert Fahrenheit back to Celsius?
Subtract 32 from the Fahrenheit value, then multiply by 5/9. You can also use the swap button on the calculator above to flip the conversion direction instantly.
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