Fahrenheit to Celsius Converter
Convert degrees Fahrenheit (°F) to degrees Celsius (°C). The two scales start at different zero points, so the conversion uses a formula rather than a single factor: °C = (°F − 32) × 5/9.
Formula: multiply the source value by -17.22222222
Quick Conversions
About this tool
On the Fahrenheit scale, water freezes at 32 °F and boils at about 212 °F at sea-level pressure. On the Celsius scale, water freezes at 0 °C and boils at about 100 °C at sea-level pressure.
How to use it
- Type a value in degrees Fahrenheit in the first field. The unit menus start on °F → °C.
- Read the result in degrees Celsius. It updates as you type; use Precision to choose how many decimals are shown.
- Press the swap button, or open the Celsius to Fahrenheit converter, to convert degrees Celsius back to degrees Fahrenheit.
°C = (°F − 32) × 5/9
°F = °C × 9/5 + 32
Examples
32 °F to °C (water freezes)
Using °C = (°F − 32) × 5/9: 32 °F = 0 °C.
98.6 °F to °C (the traditional body temperature figure)
Using °C = (°F − 32) × 5/9: 98.6 °F = 37 °C.
350 °F to °C (a common oven setting)
Using °C = (°F − 32) × 5/9: 350 °F = 176.667 °C.
Degrees Fahrenheit to degrees Celsius conversion table
| Degrees Fahrenheit (°F) | Degrees Celsius (°C) |
|---|---|
| -40 | -40 |
| 0 | -17.7778 |
| 32 | 0 |
| 40 | 4.44444 |
| 50 | 10 |
| 60 | 15.5556 |
| 68 | 20 |
| 70 | 21.1111 |
| 80 | 26.6667 |
| 90 | 32.2222 |
| 98.6 | 37 |
| 100 | 37.7778 |
| 212 | 100 |
| 350 | 176.667 |
Degrees Celsius to degrees Fahrenheit (reverse)
| Degrees Celsius (°C) | Degrees Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| -20 | -4 |
| -10 | 14 |
| 0 | 32 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 25 | 77 |
FAQ
What is the formula to convert °F to °C?
°C = (°F − 32) × 5/9. For example, 10 °F is -12.2222 °C.
How do I convert °C back to °F?
Use the reverse formula, °F = °C × 9/5 + 32.
What is 98.6 °F in Celsius?
Exactly 37 °C. It is a traditional reference for body temperature; measured normal temperature varies between people and during the day.
Is the conversion exact?
Yes. The scale definitions (0 °C = 273.15 K, and one Fahrenheit degree is 5/9 of a kelvin) are exact. Results are only rounded for display.