Convert Celsius to Fahrenheit and Fahrenheit to Celsius instantly. Bidirectional temperature converter with formula and common values.
To convert Celsius to Fahrenheit, multiply by 9/5 and add 32. The Celsius scale defines water freezing at 0°C and boiling at 100°C, while Fahrenheit uses 32°F and 212°F for the same reference points.
| Celsius | Fahrenheit |
|---|---|
| -40 | -40 |
| 0 | 32 |
| 15 | 59 |
| 25 | 77 |
| 37 | 98.6 |
| 100 | 212 |
| 180 | 356 |
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Multiply the Celsius value by 9/5 (or 1.8), then add 32. For example, 25°C: (25 × 9/5) + 32 = 77°F.
The US adopted the Fahrenheit scale before the metric system gained global traction. Switching would require updating infrastructure, weather reporting, and public education, so Fahrenheit remains the standard for everyday use.
Both scales read the same at -40 degrees. So -40°C = -40°F exactly.
Room temperature is generally considered 20-22°C, which equals 68-71.6°F.