Celsius to Fahrenheit
To convert degrees Celsius to degrees Fahrenheit, multiply by 9/5 and add 32. Type a temperature to see it in degrees Fahrenheit.
How to convert Celsius to Fahrenheit
°F = °C × 9/5 + 32
For example, 25 °C is 77 °F. Both scales are defined from the same fixed points, so the formula is exact. A change of one Celsius degree equals a change of 1.8 Fahrenheit degrees, and the two scales are offset by 32 at the freezing point of water.
A quick way to do it in your head
Double it and add 30.
- 10 °C: 20 + 30 = 50 °F. The true answer is 50 °F.
- 20 °C: 40 + 30 = 70 °F. The true answer is 68 °F.
- 30 °C: 60 + 30 = 90 °F. The true answer is 86 °F.
The shortcut is spot on at 10 °C and drifts as you move away from it: 4 degrees high at 30 °C and 2 degrees low at 0 °C. It is good for weather, and not good enough for cooking or medicine.
Celsius to Fahrenheit table
| Celsius | Fahrenheit |
|---|---|
| −40 °C | −40 °F |
| −30 °C | −22 °F |
| −20 °C | −4 °F |
| −10 °C | 14 °F |
| −5 °C | 23 °F |
| 0 °C | 32 °F |
| 5 °C | 41 °F |
| 10 °C | 50 °F |
| 15 °C | 59 °F |
| 20 °C | 68 °F |
| 22 °C | 71.6 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 35 °C | 95 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 45 °C | 113 °F |
| 50 °C | 122 °F |
| 60 °C | 140 °F |
| 80 °C | 176 °F |
| 100 °C | 212 °F |
Temperatures worth knowing
| What | Celsius | Fahrenheit |
|---|---|---|
| The two scales read the same | −40 °C | -40 °F |
| Water freezes | 0 °C | 32 °F |
| A comfortable room | 20 to 22 °C | 68 to 71.6 °F |
| Normal body temperature | 37 °C | 98.6 °F |
| A fever | 38 °C and above | 100.4 °F and above |
| Water boils at sea level | 100 °C | 212 °F |
Oven temperatures in Celsius and Fahrenheit
Oven dials in the United States move in steps of 25 °F, so recipes round to the nearest setting. The table shows the exact conversion and the setting a recipe would normally give.
| Celsius | Exact Fahrenheit | Usual oven setting |
|---|---|---|
| 140 °C | 284 °F | 275 °F |
| 150 °C | 302 °F | 300 °F |
| 160 °C | 320 °F | 325 °F |
| 180 °C | 356 °F | 350 °F |
| 190 °C | 374 °F | 375 °F |
| 200 °C | 392 °F | 400 °F |
| 220 °C | 428 °F | 425 °F |
| 230 °C | 446 °F | 450 °F |
| 240 °C | 464 °F | 475 °F |
These are temperatures for a conventional oven. Recipes written for a fan oven usually give a temperature about 20 °C lower, so check which kind the recipe means before converting.
To go the other way, use fahrenheit to celsius. For other units, see the unit converter.
Questions
What is 0 °C in Fahrenheit?
32 °F.
What is 20 °C in Fahrenheit?
68 °F.
What is 37 °C in Fahrenheit?
98.6 °F.
What is 100 °C in Fahrenheit?
212 °F.
At what temperature are Celsius and Fahrenheit equal?
At −40. Minus 40 °C and minus 40 °F are the same temperature.
Why do you add 32?
Because the Fahrenheit scale puts the freezing point of water at 32, where the Celsius scale puts it at 0. The 9/5 allows for the different size of the degrees, and the 32 allows for the different starting point.
Is centigrade the same as Celsius?
Yes. Centigrade is the older name for the Celsius scale.