How to convert degrees Celsius to degrees Fahrenheit
The two scales have different zero points and different step sizes, so the conversion is a formula rather than a single multiplication:
Worked example: 25 °C → 25 × 9/5 + 32 = 77 °F.
Quick mental estimate: Double the Celsius figure and add 30: 20 °C → 70 °F (exact answer 68 °F). Good enough for the weather.
Degrees Celsius to degrees Fahrenheit conversion table
| Degrees Celsius (°C) | Degrees Fahrenheit (°F) |
|---|---|
| -40 °C | -40 °F |
| -30 °C | -22 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 5 °C | 41 °F |
| 10 °C | 50 °F |
| 15 °C | 59 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 35 °C | 95 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 50 °C | 122 °F |
| 100 °C | 212 °F |
Values rounded to four decimals. For a value that is not in the table, use the converter above — it accepts decimals and negative numbers.
When you need this conversion
- Weather forecasts read abroad, where the same number means a heatwave or a cold snap depending on the scale.
- Cooking: oven temperatures in recipes follow the author’s country, and getting it wrong burns or undercooks the dish.
- Technical specifications — operating ranges for equipment, storage conditions for materials or medication — are published in either scale.
Getting it right
Temperature conversions are not multiplications: you cannot scale a Celsius figure by a factor to get Fahrenheit, because the two scales have different zero points as well as different step sizes.
Temperature conversions are not multiplications: the two scales have different zero points as well as different step sizes, which is why the formula includes an offset of 32.
About the units
Degree Celsius (°C)
The degree Celsius is the temperature scale used almost everywhere in the world. Water freezes at 0 °C and boils at 100 °C at sea level; a comfortable room is around 20–22 °C.
Degree Fahrenheit (°F)
The degree Fahrenheit is the everyday temperature scale of the United States. Water freezes at 32 °F and boils at 212 °F; normal body temperature is about 98.6 °F.
Frequently asked questions
How many degrees Fahrenheit are in 1 degree Celsius?
Temperature scales do not multiply: 1 °C corresponds to 33.8 °F, but the step size is different — a change of 1 °C is a change of 1.8 °F.
How do I convert degrees Celsius to degrees Fahrenheit in my head?
Double the Celsius figure and add 30: 20 °C → 70 °F (exact answer 68 °F). Good enough for the weather.
Is the °C to °F conversion exact?
The formula °F = °C × 9/5 + 32 is exact by definition of the two scales.
How do I convert degrees Celsius to degrees Fahrenheit in Excel or Google Sheets?
Put the Celsius value in A1 and use =A1*9/5+32. Excel and Google Sheets also accept =CONVERT(A1,"C","F").
How many decimal places should I keep?
For everyday use two decimals are plenty. Keep four if the result feeds another calculation, and round only at the very end — rounding intermediate steps is the most common reason a result comes out slightly wrong.