Fahrenheit to Celsius Converter
Convert degrees Fahrenheit to degrees Celsius instantly — with formula, examples and table.
Use the converter above for an immediate result — it recalculates on every keystroke and works offline once the page has loaded.
Formula: °C = (°F − 32) × 5/9. For example, 20 °F equals -6.67 °C.
How to convert degrees Fahrenheit to degrees Celsius
°C = (°F − 32) × 5/9
Fahrenheit places freezing at 32° and boiling at 212°, giving 180 finer-grained degrees between them. It remains the everyday scale of the United States.
Celsius sets 0° at water's freezing point and 100° at its boiling point at sea level. It is the world's standard scale for weather and cooking outside the US.
Fahrenheit to Celsius conversion table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 °F | -40 °C |
| -30 °F | -34.4444 °C |
| -20 °F | -28.8889 °C |
| -10 °F | -23.3333 °C |
| -5 °F | -20.5556 °C |
| 0 °F | -17.7778 °C |
| 5 °F | -15 °C |
| 10 °F | -12.2222 °C |
| 15 °F | -9.4444 °C |
| 20 °F | -6.6667 °C |
| 25 °F | -3.8889 °C |
| 30 °F | -1.1111 °C |
| 35 °F | 1.6667 °C |
| 37 °F | 2.7778 °C |
| 40 °F | 4.4444 °C |
| 45 °F | 7.2222 °C |
Need the opposite direction? Use the Celsius to Fahrenheit converter, or read our complete guide to temperature conversions for every formula in one place.
Frequently asked questions
What is the formula to convert Fahrenheit to Celsius?
°C = (°F − 32) × 5/9. For example, 25 °F equals -3.89 °C.
What is 100 °F in °C?
100 °F equals 37.78 °C, using the formula °C = (°F − 32) × 5/9.
Is my data stored when I use this converter?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is sent to a server, logged or stored.