Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit with F = C x 9/5 + 32. Enter a temperature in degrees Celsius to get Fahrenheit and Kelvin. Example: 25 °C = 77 °F.
Type the problems from this lesson and check each step.
Show steps
How to use the Celsius to Fahrenheit Converter
- Type the value in celsius.
- Choose how many decimal places you want.
- Press Calculate to see the value in fahrenheit, with the formula and steps.
Formula and method
°F = °C × 9/5 + 32 (or °C × 1.8 + 32)
Water freezes at 0°C (32°F) and boils at 100°C (212°F) at sea level, so 100 Celsius degrees span 180 Fahrenheit degrees, a ratio of 9 to 5. The two scales meet at −40, where −40°C equals −40°F. For a mental estimate, double the Celsius value and add 30: 25°C gives 80°F, against the exact 77°F.
°C to °F conversion chart
| Celsius | Fahrenheit |
|---|---|
| -40 °C | -40 °F |
| -30 °C | -22 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °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 |
| 100 °C | 212 °F |
| 180 °C | 356 °F |
| 200 °C | 392 °F |
| 220 °C | 428 °F |
Everyday temperatures
| Situation | Celsius | Fahrenheit |
|---|---|---|
| Water freezes | 0 | 32 |
| Cool day | 10 | 50 |
| Room temperature | 20 to 22 | 68 to 72 |
| Warm day | 30 | 86 |
| Normal body temperature | 37 | 98.6 |
| Fever threshold (adults) | 38 | 100.4 |
| Water boils | 100 | 212 |
| Typical oven for baking | 180 | 356 |
| Hot oven | 220 | 428 |
Weather and cooking
Weather forecasts outside the US use Celsius, so 35°C is a hot 95°F. Recipes from Europe list oven temperatures in Celsius: 180°C is 356°F, usually rounded to 350°F, and 200°C is 392°F, usually rounded to 400°F. Use the Fahrenheit to Celsius converter to go the other way.
What are degrees Celsius and degrees Fahrenheit?
The Celsius scale sets the freezing point of water at 0 degrees and its boiling point at 100 degrees at standard atmospheric pressure. One Celsius degree is the same size as one kelvin.
The Fahrenheit scale, published by Daniel Gabriel Fahrenheit in 1724, puts water’s freezing point at 32 degrees and its boiling point at 212 degrees. It is the everyday scale in the United States.
How to convert celsius to fahrenheit step by step
- Write the value you want to convert: 18 °C.
- Apply the rule celsius to fahrenheit: × 9/5 + 32.
- Calculate: 18 × 9/5 + 32 = 64.4 °F.
- Check a second value, -10 °C: -10 × 9/5 + 32 = 14 °F.
Round the answer to the precision you need. For quick checks use the mental estimate in the formula section above, and use the converter for exact results.
Full °C to °F chart
| °C | °F | °C | °F | °C | °F |
|---|---|---|---|---|---|
| -20 °C | -4 °F | 30 °C | 86 °F | 80 °C | 176 °F |
| -15 °C | 5 °F | 35 °C | 95 °F | 85 °C | 185 °F |
| -10 °C | 14 °F | 40 °C | 104 °F | 90 °C | 194 °F |
| -5 °C | 23 °F | 45 °C | 113 °F | 95 °C | 203 °F |
| 0 °C | 32 °F | 50 °C | 122 °F | 100 °C | 212 °F |
| 5 °C | 41 °F | 55 °C | 131 °F | 105 °C | 221 °F |
| 10 °C | 50 °F | 60 °C | 140 °F | 110 °C | 230 °F |
| 15 °C | 59 °F | 65 °C | 149 °F | 115 °C | 239 °F |
| 20 °C | 68 °F | 70 °C | 158 °F | 120 °C | 248 °F |
| 25 °C | 77 °F | 75 °C | 167 °F | 125 °C | 257 °F |
Frequently asked questions
What is the formula to convert Celsius to Fahrenheit?
Multiply by 9/5 (or 1.8) and add 32.
What is 0 degrees Celsius in Fahrenheit?
32 degrees Fahrenheit, the freezing point of water.
At what temperature are Celsius and Fahrenheit equal?
At −40 degrees, both scales read the same value.
Sources
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