Celsius to Fahrenheit Formula
°F = (°C × 9/5) + 32 · equivalently °F = °C × 1.8 + 32
Example: to convert 30 °C, multiply by 1.8 to get 54, then add 32 to get 86 °F.
Fahrenheit to Celsius Formula
°C = (°F − 32) × 5/9
Example: to convert 98.6 °F, subtract 32 to get 66.6, then multiply by 5/9 to get 37 °C, normal body temperature.
Quick Mental Shortcut
For a rough estimate, double the Celsius and add 30. 20 °C → 40 + 30 = 70 °F (exact: 68 °F). It's handy for weather, but use the converter for cooking or medical temperatures.
Celsius to Fahrenheit Chart
| Celsius | Fahrenheit |
|---|---|
| -40 °C | -40 °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 |
| 50 °C | 122 °F |
| 100 °C | 212 °F |
| 180 °C | 356 °F |
| 200 °C | 392 °F |
Useful Temperatures to Know
- Water freezes: 0 °C = 32 °F
- Room temperature: about 20–22 °C = 68–72 °F
- Normal body temperature: 37 °C = 98.6 °F
- Fever: 38 °C = 100.4 °F or higher
- Water boils (sea level): 100 °C = 212 °F
- Moderate oven: 180 °C = 356 °F (recipes often round to 350 °F)
- Same in both scales: −40 °C = −40 °F
Works on Every Device
The Celsius to Fahrenheit Converter works in any browser on desktop, tablet or phone, and keeps working offline once the page has loaded. Results appear as you type, so there's no button to press, and you can copy the answer with one click. Bookmark this page to have it ready next time.
Troubleshooting & Tips
- Negative temperatures Type a minus sign, e.g. −10 °C = 14 °F. Both boxes accept negative values.
- Decimal commas You can type 36,6 or 36.6; both are understood.
- Kelvin Kelvin = °C + 273.15. Convert to Celsius first, then use this converter for Fahrenheit.
- Oven temperatures Recipes usually round, so 180 °C (356 °F) is commonly written as 350 °F, and 200 °C as 400 °F.
Frequently Asked Questions
What is the formula to convert Celsius to Fahrenheit?
Multiply by 9/5 (or 1.8) and add 32: °F = °C × 1.8 + 32.
What is 37 °C in Fahrenheit?
37 °C is 98.6 °F, which is normal human body temperature.
What is 180 °C in Fahrenheit for baking?
180 °C is 356 °F. Many recipes round this to 350 °F.
At what temperature are Celsius and Fahrenheit equal?
At −40 degrees: −40 °C equals −40 °F.
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9: °C = (°F − 32) × 5/9.
Written by Prakhar Singh, software engineer and creator of K4Converter · Last updated October 2026