How to use Celsius to Fahrenheit
- Type a value in Celsius.
- The result in Fahrenheit appears instantly.
- Type in the second box to convert the other way.
How to convert Celsius to Fahrenheit
Use the formula °F = °C × 9/5 + 32. Example: 25 °C = 77 °F.
Common Celsius to Fahrenheit conversions
-10 °C = 14 °F. 0 °C = 32 °F. 37 °C = 98.6 °F. 100 °C = 212 °F.
Quick mental math
Quick estimate: double the °C and add 30. For 20 °C that gives 70 °F (exact: 68 °F).
Where is °C to °F conversion used?
Temperature conversions matter for weather forecasts when travelling, oven settings in recipes, body temperature and fever checks, aquarium and pool care, and science or lab work.
What are Celsius?
Celsius is the metric temperature scale. Water freezes at 0 °C and boils at 100 °C at sea level. It is used in most countries.
What are Fahrenheit?
Fahrenheit is used mainly in the United States. Water freezes at 32 °F and boils at 212 °F. Normal body temperature is about 98.6 °F.
Celsius to Fahrenheit conversion table
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| -20 | -4 |
| -10 | 14 |
| 0 | 32 |
| 5 | 41 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 35 | 95 |
| 37 | 98.6 |
| 40 | 104 |
| 50 | 122 |
| 60 | 140 |
| 80 | 176 |
| 100 | 212 |
Frequently asked questions
What is 25 °C in Fahrenheit?
25 °C = 77 °F.
What is 0 °C in Fahrenheit?
0 °C = 32 °F.
What is 100 °C in Fahrenheit?
100 °C = 212 °F.
What is the formula for Celsius to Fahrenheit?
°F = °C × 9/5 + 32.
Is the °C to °F conversion exact?
Yes. Temperature formulas are exact; results are rounded only for display. Note that temperature scales have different zero points, so you cannot convert by multiplying alone.
Last updated: · Free to use, no sign-up.