Convert fahrenheit to celsius instantly. Type a value below to see the result, or press Swap direction to convert celsius back to fahrenheit. The tool uses the exact conversion factor, and a quick-reference table is below.
Celsius
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Conversion formula
°C = (°F − 32) × 5 ÷ 9
A quick shortcut: subtract 30 and halve it. 70 °F gives about 20 °C. The exact figure is 21.1 °C.
Quick reference table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 °F | -40 °C |
| 0 °F | -17.7778 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 72 °F | 22.2222 °C |
| 86 °F | 30 °C |
| 98.6 °F | 37 °C |
| 100 °F | 37.7778 °C |
| 212 °F | 100 °C |
Frequently asked questions
How do I convert fahrenheit to celsius?
°C = (°F − 32) × 5 ÷ 9
How do I convert celsius back to fahrenheit?
Use the reverse formula, or press Swap direction in the converter above. You can also use our reverse converter.
What is 100 °F in Celsius?
100 °F is about 37.8 °C.
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Conversions use standard factors. Check critical measurements.