Celsius to Fahrenheit: Easy Conversion Formula and Quick Reference
Convert Celsius to Fahrenheit instantly with the simple formula. Includes a reference table, common temperatures, cooking conversions, and a free calculator.
The Conversion Formula
The formula to convert Celsius to Fahrenheit is: F = (C x 9/5) + 32. To convert Fahrenheit to Celsius: C = (F - 32) x 5/9. These formulas account for the fact that the two scales have different zero points and different degree sizes.
Celsius to Fahrenheit:
F = (C x 1.8) + 32
Fahrenheit to Celsius:
C = (F - 32) / 1.8
Examples:
0C = 32F (water freezes)
20C = 68F (room temperature)
37C = 98.6F (body temperature)
100C = 212F (water boils)Quick Reference Table
| Celsius | Fahrenheit | Description |
|---|---|---|
| -40 | -40 | Where both scales meet |
| -18 | 0 | Very cold winter day |
| 0 | 32 | Water freezes |
| 10 | 50 | Cool day |
| 20 | 68 | Room temperature |
| 25 | 77 | Comfortable warm day |
| 30 | 86 | Hot summer day |
| 37 | 98.6 | Human body temperature |
| 40 | 104 | Heat wave |
| 100 | 212 | Water boils |
| 180 | 356 | Oven baking temperature |
| 200 | 392 | High oven temperature |
Who Uses Which Scale?
Celsius is used by virtually every country in the world for weather, science, and daily life. The United States is the main exception, using Fahrenheit for weather and cooking. A few other countries (Bahamas, Cayman Islands, Palau) also use Fahrenheit.
Cooking Temperature Conversions
| Celsius | Fahrenheit | Cooking Term |
|---|---|---|
| 120 | 250 | Very low/slow oven |
| 150 | 300 | Low oven |
| 180 | 350 | Moderate oven (most baking) |
| 190 | 375 | Moderately hot |
| 200 | 400 | Hot oven |
| 220 | 425 | Very hot oven |
| 230 | 450 | Extremely hot |
| 260 | 500 | Broiling/pizza |
Quick Mental Math Tricks
- For a rough estimate: double the Celsius and add 30. Example: 20C -> 40 + 30 = 70F (actual: 68F).
- For Fahrenheit to Celsius: subtract 30, then halve. Example: 86F -> 56 / 2 = 28C (actual: 30C).
- These shortcuts are accurate within about 2-5 degrees for everyday temperatures.
Free Celsius to Fahrenheit Converter
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