Celsius to Fahrenheit Converter
Converts celsius to fahrenheit (°C to °F) and back. The conversion factor is shown below every result.
How to Convert Celsius to Fahrenheit
What Is a Celsius?
Degree Celsius (°C) is a temperature scale where 0°C is the freezing point of water and 100°C is the boiling point at standard atmospheric pressure.
What Is a Fahrenheit?
Degree Fahrenheit (°F) is a temperature scale used mainly in the United States, where water freezes at 32°F and boils at 212°F.
Common Celsius to Fahrenheit Reference Points
Real-world reference values for quick sanity checks.
| Item | Celsius (°C) | Fahrenheit (approx.) |
|---|---|---|
| Water freezes | 0 °C | 32°F |
| Room temperature | 21 °C | 69.8°F |
| Body temperature | 37 °C | 98.6°F |
| Water boils | 100 °C | 212°F |
| Reference values are illustrative approximations for common items, not measured specifications. | ||
Celsius to Fahrenheit Conversion Table
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -40 °C | -40 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 100 °C | 212 °F |
| Source: NIST SP 811, Appendix B (°F = °C × 9/5 + 32) | |
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5, then add 32. For example, 20°C × 9/5 + 32 = 68°F.
At what temperature are Celsius and Fahrenheit equal?
At −40 degrees. −40°C and −40°F represent the exact same temperature, the one point where both scales intersect.
Why does water boil at 100°C but 212°F?
The Celsius scale was defined so that water freezes at 0° and boils at 100° at standard atmospheric pressure. The Fahrenheit scale uses a different zero point and a smaller degree size, so the same physical temperatures land on different numbers.
Is this formula accurate for oven and cooking temperatures?
Yes, the formula is exact at any temperature. For oven use, round to the nearest 5 or 25 degrees since most ovens don't hold temperature more precisely than that anyway.
Related Temperature Converters
A good measuring tool marked in both °C and °F removes the guesswork at the point of use.