Celsius and Fahrenheit are the two most widely used temperature scales in daily life. If you've ever looked at a weather forecast in another country and had no idea whether to wear a coat or shorts, this guide is for you.
Quick answer: To convert Celsius to Fahrenheit, multiply by 9/5 (or 1.8) and add 32. To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9 (or 0.5556).
For a quick mental approximation, double the Celsius temperature and add 30. This gives a rough Fahrenheit equivalent that's close enough for everyday use. For example, 20°C → (20 × 2) + 30 = 70°F (exact answer: 68°F).
| Celsius (°C) | Fahrenheit (°F) | Description |
|---|---|---|
| -40°C | -40°F | The point where both scales are equal |
| 0°C | 32°F | Freezing point of water |
| 10°C | 50°F | Cold day |
| 20°C | 68°F | Room temperature |
| 25°C | 77°F | Warm day |
| 37°C | 98.6°F | Normal body temperature |
| 40°C | 104°F | Very hot day / fever |
| 100°C | 212°F | Boiling point of water |
The vast majority of the world — including all of Europe, Asia, Africa, South America, and Australia — uses Celsius as the standard temperature scale. The United States is the most notable exception, using Fahrenheit for everyday weather and cooking.
The Bahamas, Belize, and the Cayman Islands also use Fahrenheit for weather, though Celsius is used in scientific and medical contexts worldwide regardless of location.
| Oven Setting | Celsius (°C) | Fahrenheit (°F) |
|---|---|---|
| Very Low | 120°C | 250°F |
| Low | 150°C | 300°F |
| Moderate | 180°C | 350°F |
| Hot | 200°C | 400°F |
| Very Hot | 220°C | 425°F |
Use our free temperature converter for exact Celsius, Fahrenheit, and Kelvin conversions.
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