Conversions
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Convert Fahrenheit to Celsius: formula and table
Convert Fahrenheit to Celsius with the exact formula, a reference table and concrete examples.
Published on January 17, 2026Faced with a thermometer showing 98.6°F or a recipe indicating 350°F, you need to know how to convert to Celsius. This conversion is the reverse of Celsius → Fahrenheit, involving a subtraction and a multiplication.
Understanding the conversion
To convert Fahrenheit to Celsius, first subtract 32 (to cancel the original offset), then multiply by 5/9 (the inverse of the 9/5 factor).
📐 Formula
°C = (°F − 32) × 5/9
or
°C = (°F − 32) ÷ 1.8
📊 Conversion table
| Fahrenheit (°F) | Celsius (°C) | Reference |
|---|---|---|
| -40 | -40 | Equality point |
| 14 | -10 | Very cold |
| 32 | 0 | Freezing point |
| 68 | 20 | Room temperature |
| 77 | 25 | Warm |
| 98.6 | 37 | Body temperature |
| 212 | 100 | Boiling water |
| 350 | 176.7 | Moderate oven |
| 450 | 232.2 | Hot oven |
💡 Practical examples
Example 1: 68°F (comfort temperature)
(68 − 32) ÷ 1.8 = 36 ÷ 1.8 = 20°C. A room at 68°F is 20°C, the ideal working temperature.
Example 2: 350°F (baking oven)
(350 − 32) ÷ 1.8 = 318 ÷ 1.8 ≈ 176.7°C. Standard temperature for baking cookies or a cake.
Example 3: 32°F (freezing)
(32 − 32) ÷ 1.8 = 0°C. 32°F corresponds exactly to the freezing point of water.