Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit quickly and accurately. Type a temperature in °C and the Fahrenheit equivalent appears instantly.
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Formula
To convert Celsius to Fahrenheit, multiply by 1.8 and then add 32.
1 °C = 33.8 °F
Fahrenheit = Celsius × 1.8 + 32
About celsius and fahrenheit
Celsius sets 0° at the freezing point of water and 100° at its boiling point at sea level, which makes it the standard for weather, cooking and science almost everywhere.
Fahrenheit is still the everyday scale in the United States. Its degrees are smaller — a 1°F step is only 5/9 of a 1°C step — so Fahrenheit temperatures look larger for the same conditions.
Accuracy
The two scales cross at −40°, the only temperature where both read the same number. Because the conversion has an offset as well as a multiplier, you cannot convert a temperature difference the same way you convert a temperature: a change of 1°C is a change of 1.8°F, with no +32.
Celsius to Fahrenheit conversion table
| Celsius | Fahrenheit |
|---|---|
| -40 °C | -40 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 100 °C | 212 °F |
Frequently asked questions
How do you convert Celsius to Fahrenheit?
Fahrenheit = Celsius × 1.8 + 32. For example, -40 °C equals -40 °F.
What is 100°C in Fahrenheit?
100°C is 212°F. That is the boiling point of water at standard atmospheric pressure.
What is normal body temperature in Fahrenheit?
37°C converts to 98.6°F. The 98.6 figure is simply this conversion of a rounded 37°C, which is why it looks suspiciously precise.
How can I convert Celsius to Fahrenheit in my head?
Double the Celsius value and add 30. For 20°C that gives 70°F against a true 68°F — close enough for weather, though it drifts at extremes.
At what temperature are Celsius and Fahrenheit equal?
−40°. It is the single point where the two scales cross, so −40°C and −40°F describe the same temperature.
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