Convert Fahrenheit to Celsius
Fahrenheit (°F) to Celsius (°C) — the formula, a worked example and a live converter, all in your browser.
Fahrenheit to Celsius formula
Temperature scales don't share a zero point, so the conversion uses an offset formula rather than a simple ratio:
°C = (°F − 32) × 5/9
Worked example
20 °F = 20 = -6.666666667 °C.
Fahrenheit to Celsius conversion table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 | -40 |
| 0 | -17.77777778 |
| 20 | -6.666666667 |
| 37 | 2.777777778 |
| 100 | 37.77777778 |
Common uses
Useful for understanding US weather reports, recipe oven temperatures and body-temperature readings in Celsius.
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Frequently asked questions
What is the formula to convert fahrenheit to celsius?
Use °C = (°F − 32) × 5/9.
What is 20°F in celsius?
20°F equals -6.666666667°C.
Is this converter accurate?
Yes. It uses the exact internationally-defined conversion factors and runs entirely in your browser, so results match standards tables and nothing you type is uploaded.