To convert Celsius to Fahrenheit, multiply by 9/5 (1.8) and add 32. A quick mental estimate is to double the Celsius value and add 30.
How to use the Celsius to Fahrenheit Converter
- Type the number of degrees Celsius into the Degrees Celsius field. Decimals such as 18.5 are fine.
- Read the answer in Degrees Fahrenheit – it updates as you type, with no button to press.
- To convert the other way, type into Degrees Fahrenheit and the degrees Celsius are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only °C ⇄ °F. Need a different unit? Use the general temperature converter, where you can choose any “from” and “to” unit.
How it works
Degrees Celsius and degrees Fahrenheit use different zero points as well as different sized degrees, so this is not a simple multiplication: the calculator applies the formula °F = °C × 9/5 + 32, which first scales the value and then shifts it by the offset between the two zero points. Going back uses the inverse, °C = (°F − 32) ÷ 1.8. Results are calculated at full precision and rounded only for display, so typing into either field gives consistent values.
How to convert degrees Celsius to degrees Fahrenheit
- Start with the value in degrees Celsius: 37 °C.
- Apply the formula °F = °C × 9/5 + 32.
- The result is 98.6 °F.
- To go back, use °C = (°F − 32) ÷ 1.8.
°C to °F conversion table
| Degrees Celsius | Degrees Fahrenheit | Degrees Fahrenheit | Degrees Celsius |
|---|---|---|---|
| -40 °C | -40 °F | 0 °F | -17.777778 °C |
| -20 °C | -4 °F | 32 °F | 0 °C |
| -5 °C | 23 °F | 50 °F | 10 °C |
| 5 °C | 41 °F | 68 °F | 20 °C |
| 15 °C | 59 °F | 98.6 °F | 37 °C |
| 25 °C | 77 °F | 212 °F | 100 °C |
| 35 °C | 95 °F | 350 °F | 176.66667 °C |
| 38 °C | 100.4 °F | ||
| 50 °C | 122 °F | ||
| 150 °C | 302 °F | ||
| 200 °C | 392 °F | ||
| 250 °C | 482 °F |
What is a degree Celsius?
The Celsius scale sets 0 °C at the freezing point and 100 °C at the boiling point of water at sea level. Since 2019 it is defined from the kelvin: °C = K − 273.15.
What is a degree Fahrenheit?
The Fahrenheit scale, proposed by Daniel Fahrenheit in 1724, puts water’s freezing point at 32 °F and boiling point at 212 °F. It is the everyday scale in the United States.
Common mistakes to avoid
Forgetting the offset (°f is not just °c × 1.8), converting temperature differences with the full formula (a change of 10 °c is a change of 18 °f, with no +32), and writing “degrees kelvin”.
Formula
°F = °C × 9/5 + 32Worked example
Inputs — Degrees Celsius: 37 °C.
Results — Degrees Fahrenheit = 98.6 °F.
Frequently asked questions
What is 37 °C in Fahrenheit?
98.6 °F, typical body temperature.
What is a quick estimate?
Double the Celsius value and add 30.
How do I convert degrees Celsius to degrees Fahrenheit?
Use °F = °C × 9/5 + 32. For example, 37 °C = 98.6 °F.
How do I convert degrees Fahrenheit back to degrees Celsius?
Use °C = (°F − 32) ÷ 1.8, or type the value into the degrees Fahrenheit field above.
What is 10 °C in degrees Fahrenheit?
10 °C = 50 °F.
What is 100 °C in degrees Fahrenheit?
100 °C = 212 °F.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between degrees Celsius and degrees Fahrenheit. To pick any temperature unit, use the general temperature converter linked under Related calculators.
What formula does the Celsius to Fahrenheit Converter use?
°F = °C × 9/5 + 32.