How to use Celsius to Fahrenheit
Type a value in Celsius and the Fahrenheit figure appears straight away. The conversion table further down lists common values.
A quick estimate in your head
Double the Celsius figure and add 30. For 20 °C that gives 70 °F, close to the exact 68 °F. The shortcut is good for weather but drifts at the extremes, so use the converter for cooking, medicine or science.
Temperatures worth remembering
Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F) at sea level. Normal body temperature is about 37 °C (98.6 °F), and a comfortable room is around 20 to 22 °C (68 to 72 °F). At −40, both scales read the same.
The formula
°F = (°C × 9/5) + 32
Examples
- 0 celsius to fahrenheit
32 °F
- 37 celsius to fahrenheit
98.6 °F
- 100 celsius to fahrenheit
212 °F
Celsius to Fahrenheit conversion table
| Celsius | Fahrenheit |
|---|---|
| -40 | -40 °F |
| -20 | -4 °F |
| -10 | 14 °F |
| 0 | 32 °F |
| 10 | 50 °F |
| 15 | 59 °F |
| 20 | 68 °F |
| 25 | 77 °F |
| 30 | 86 °F |
| 37 | 98.6 °F |
| 40 | 104 °F |
| 50 | 122 °F |
| 60 | 140 °F |
| 80 | 176 °F |
| 100 | 212 °F |
| 180 | 356 °F |
| 200 | 392 °F |
Limitations and assumptions
Results are estimates for general information. Check assumptions and inputs before relying on them.
Frequently asked questions
What is 1 celsius in fahrenheit?
1 celsius is 33.8 °F. Temperature scales have different zero points, so you cannot multiply by that figure for other values. Use °F = (°C × 9/5) + 32 instead.
How do I convert celsius to fahrenheit?
Use °F = (°C × 9/5) + 32. For example, 37 celsius gives 98.6 °F. Enter your own value above and the converter does the arithmetic for you.
How do I convert fahrenheit back to celsius?
Use the Fahrenheit to Celsius converter, or invert the factor by dividing instead of multiplying.
Is this conversion exact?
Temperature scales differ by an offset as well as a ratio, which is why you cannot convert them by multiplying alone.