Degrees Celsius to degrees Fahrenheit
Type a value in degrees Celsius to see it in degrees Fahrenheit straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the degrees Celsius box.
- Read the result in degrees Fahrenheit as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
°F = °C × 1.8 + 32
Multiply by 1.8, then add 32, because the two scales have different zero points.
Example
To convert 25 °C to degrees Fahrenheit: 25 × 1.8 + 32 = 77 °F.
Conversion table
| Degrees Celsius (°C) | Degrees Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| -20 | -4 |
| -10 | 14 |
| 0 | 32 |
| 10 | 50 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 37 | 98.6 |
| 40 | 104 |
| 50 | 122 |
| 100 | 212 |
About the units
- Degree Celsius
- A degree Celsius is the same size as a kelvin, but the scale is shifted so that K = °C + 273.15 exactly. Water freezes at 0 °C and boils at about 100 °C at standard pressure.
- Degree Fahrenheit
- The scale used in the United States, defined exactly by °F = °C × 9/5 + 32. Water freezes at 32 °F and boils at about 212 °F.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
What is 0 degrees Celsius in degrees Fahrenheit?
0 °C = 32 °F. The formula is °F = °C × 1.8 + 32.
How do I convert degrees Celsius to degrees Fahrenheit?
Use °F = °C × 1.8 + 32. For example, 25 °C = 77 °F.
How many degrees Celsius are in one degree Fahrenheit?
1 °F = -17.2222 °C.
Why is temperature conversion not a simple multiplication?
Celsius and Fahrenheit do not start at absolute zero, so converting needs an offset as well as a factor. For example °F = °C × 9/5 + 32, which is why 0 °C is 32 °F, not 0.
At what temperature are Celsius and Fahrenheit equal?
At minus 40: -40 °C is exactly -40 °F.