How to convert Celsius to Fahrenheit
°F = (°C × 9/5) + 32. Example: 25 °C × 1.8 + 32 = 77 °F.
Celsius to Fahrenheit conversion table
| Celsius (c) | Fahrenheit (f) |
|---|---|
| -40 | -40 |
| -20 | -4 |
| -10 | 14 |
| 0 | 32 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 35 | 95 |
| 37 | 98.6 |
| 40 | 104 |
| 50 | 122 |
| 100 | 212 |
About the units
Celsius (c) — the metric temperature scale where water freezes at 0 °C and boils at 100 °C at sea level.
Fahrenheit (f) — the temperature scale used in the US, where water freezes at 32 °F and boils at 212 °F.
Frequently asked questions
What is the formula for Celsius to Fahrenheit?
°F = (°C × 9/5) + 32. Example: 25 °C × 1.8 + 32 = 77 °F.
Is there a quick way to estimate it in my head?
Double the Celsius value and add 30. It is close for everyday temperatures (e.g. 20 °C ≈ 70 °F; exact: 68 °F).
Is this converter accurate?
Yes. It uses the internationally defined conversion factors (for example, 1 inch = 2.54 cm exactly and 1 pound = 0.45359237 kg exactly) and shows up to 10 significant digits.
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