Celsius to Fahrenheit Converter
To convert Celsius to Fahrenheit, multiply by 9/5 and add 32. Water boils at 100 °C, which is 212 °F.
How to Convert Celsius to Fahrenheit
To convert degrees Celsius to degrees Fahrenheit, multiply by 9/5, then add 32.
For example: 25 °C × 9/5 = 45, and 45 + 32 = 77 °F.
Where This Comes Up
Weather forecasts, recipes, thermostats and fever readings from anywhere outside the United States come in Celsius. Americans need Fahrenheit to know whether to wear a coat or how to set the oven.
A 20 °C day is 68 °F, the temperature most offices are set to.
What People Get Wrong
Celsius oven temperatures are usually given in round numbers that do not convert to the 25-degree steps American dials use. 180 °C is 356 °F, so the nearest dial setting is 350 °F.
Celsius to Fahrenheit Conversion Table
| Degrees Celsius (°C) | Degrees Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| -20 | -4 |
| -10 | 14 |
| 0 | 32 |
| 5 | 41 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 35 | 95 |
| 37 | 98.6 |
| 40 | 104 |
| 50 | 122 |
| 60 | 140 |
| 70 | 158 |
| 80 | 176 |
| 90 | 194 |
| 100 | 212 |
| 120 | 248 |
| 150 | 302 |
| 180 | 356 |
| 200 | 392 |
| 220 | 428 |
About These Units
The degree Celsius
The Celsius scale puts the freezing point of water at 0 degrees and its boiling point at 100 degrees at sea level. It is the everyday temperature scale in nearly every country except the United States.
The degree Fahrenheit
On the Fahrenheit scale water freezes at 32 degrees and boils at 212 degrees, so one Fahrenheit degree is 5/9 the size of a Celsius degree. It remains the standard scale for weather, ovens and body temperature in the United States.
Definitions follow The SI Brochure, BIPM. See how we calculate for the exact values and rounding rules.
Frequently Asked Questions
What is the formula for Celsius to Fahrenheit?
Fahrenheit equals Celsius times 9/5 plus 32. For 25 °C that is 45 plus 32, or 77 °F.
What is 37 °C in Fahrenheit?
37 °C is exactly 98.6 °F, the standard figure for normal body temperature.
What is the quick mental conversion?
Double it and add 30. 20 °C gives 70 °F against the exact 68 °F, which is close enough for a weather forecast.
What is a fever of 38 °C in Fahrenheit?
38 °C is 100.4 °F, the usual threshold for calling something a fever.