Celsius to Fahrenheit Converter
To convert Celsius to Fahrenheit, use the formula F = (C × 9/5) + 32. For example, 25 Celsius equals 77 Fahrenheit. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
F = (C × 9/5) + 32
Use the temperature formula to convert Celsius values to Fahrenheit.
Example Conversions
0 Celsius (C)
32 Fahrenheit (F)
1 Celsius (C)
33.8 Fahrenheit (F)
25 Celsius (C)
77 Fahrenheit (F)
100 Celsius (C)
212 Fahrenheit (F)
212 Celsius (C)
413.6 Fahrenheit (F)
Conversion Table
| Celsius (C) | Fahrenheit (F) |
|---|---|
| 0 | 32 |
| 1 | 33.8 |
| 10 | 50 |
| 20 | 68 |
| 25 | 77 |
| 32 | 89.6 |
| 37 | 98.6 |
| 50 | 122 |
| 75 | 167 |
| 100 | 212 |
| 212 | 413.6 |
| 273.15 | 523.67 |
How to Convert Manually
Use these steps to convert Celsius values to Fahrenheit without the calculator.
- Write down the value in Celsius (C) that you want to convert.
- Apply the formula: F = (C × 9/5) + 32.
- For example, converting 10 Celsius gives 50 Fahrenheit.
- Label the result as Fahrenheit (F).
About Celsius and Fahrenheit
The degree Celsius is the SI temperature unit for everyday use, with 0 °C at the freezing point and 100 °C at the boiling point of water at standard pressure. It is offset from the kelvin by exactly 273.15. The degree Fahrenheit sets water's freezing point at 32 °F and boiling point at 212 °F, dividing the interval into 180 degrees. The US uses it for weather, cooking, and medicine. The two scales are related by the formula F = (C × 9/5) + 32, not a fixed factor. Celsius to Fahrenheit conversion comes up most often in weather forecasts outside the US and in cooking and oven settings in metric countries, typically when figures need restating for US weather forecasts and thermostats.
Precision and Rounding: Temperature conversions are formula-based, not factor-based, so apply the full formula before rounding. Whole degrees are fine for weather and cooking; lab work, medicine, and HVAC commissioning usually carry one or two decimal places.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 Celsius equals 59 Fahrenheit.
15 C -> 59 F
FAQ
How do I convert Celsius to Fahrenheit?
Use the temperature formula to convert Celsius values to Fahrenheit.
What is the formula for Celsius to Fahrenheit?
The formula is F = (C × 9/5) + 32.
How many Fahrenheit are in 1 Celsius?
1 Celsius equals 33.8 Fahrenheit.
Can I convert Fahrenheit back to Celsius?
Yes. 1 Fahrenheit equals -17.22222222 Celsius, and the related converter can reverse the calculation.
What are common names for Celsius and Fahrenheit?
Celsius is shown as C and may also be searched as celsius, centigrade, °C. Fahrenheit is shown as F and may also be searched as fahrenheit, °F.
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