How to convert degrees Celsius to degrees Fahrenheit
Celsius and Fahrenheit do not start at the same zero: water freezes at 0°C = 32°F and boils at 100°C = 212°F. So you multiply and add — a plain multiplication gives the wrong answer.
Formula: °F = °C × 9/5 + 32
Example: 20°C × 9/5 = 36, + 32 = 68°F
°C to °F table
| Degrees Celsius (°C) | Degrees Fahrenheit (°F) |
|---|---|
| −40 | −40 |
| −30 | −22 |
| −20 | −4 |
| −10 | 14 |
| −5 | 23 |
| 0 | 32 |
| 5 | 41 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 35 | 95 |
| 37 | 98.6 |
| 40 | 104 |
| 50 | 122 |
| 100 | 212 |
| 150 | 302 |
| 180 | 356 |
| 200 | 392 |
| 220 | 428 |
| 250 | 482 |
Values are rounded to 1 decimal place.
Temperatures worth knowing
- Room temperature: 20–22°C = 68–72°F
- Body temperature: 37°C = 98.6°F; a fever starts around 38°C = 100.4°F
- Oven: 180°C = 356°F (often written 350°F), 200°C = 392°F (400°F)
- −40°C = −40°F — the one point where both scales meet
How to use it
- Type a number in the From box — the answer appears straight away
- Click Swap (⇄) to convert the other way, from degrees Fahrenheit to degrees Celsius
- Change the units or the category to convert anything else — length, weight, temperature, volume, speed and more
Frequently asked questions
What is the formula for Celsius to Fahrenheit?
Multiply by 9/5 (or 1.8) and add 32. 25°C × 1.8 = 45, + 32 = 77°F.
Is there a quick way to convert C to F?
Double it and add 30: 20°C → 40 + 30 = 70°F (exact: 68°F). Good enough for the weather, not for baking.
What is 180°C in Fahrenheit?
356°F. Recipes usually round it to 350°F.
Is my data sent anywhere?
No. The conversion runs in your browser, on your own device.
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