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.
Full guide: Fahrenheit to Celsius — where the factor comes from, worked examples and the mistakes people make.
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.