Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit instantly. Exact formula, quick chart and examples. Free, no signup.
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About the Celsius to Fahrenheit Converter
This free Celsius to Fahrenheit converter gives the exact result as you type, with no button to press and no signup. It is built for everyday use in the US: recipes, travel, fitness, weather, school work and shopping. The formula and a quick reference chart are included below so you can check the math yourself.
Need the opposite direction? Use the Fahrenheit to Celsius converter.
How to use it
- Type the number of Celsius in the first box.
- Read the result in Fahrenheit immediately below.
- Use the chart on this page for common values you can check at a glance.
Celsius to Fahrenheit formula
°F = (°C × 9/5) + 32
Example: 25 °C × conversion = 77 °F.
Quick mental estimate: double the Celsius number and add 30. For 20 °C that gives 70 °F (exact: 68 °F). It is close enough for weather.
°C to °F chart
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -40 °C | -40 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 100 °C | 212 °F |
°F to °C reverse chart
Going the other way? These are the same values read backwards.
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 °F | -40 °C |
| -4 °F | -20 °C |
| 14 °F | -10 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 77 °F | 25 °C |
| 86 °F | 30 °C |
| 98.6 °F | 37 °C |
| 104 °F | 40 °C |
| 212 °F | 100 °C |
About Celsius and Fahrenheit
The Celsius scale sets water freezing at 0 °C and boiling at 100 °C at sea level pressure. The Fahrenheit scale, still used in the United States for weather, cooking and body temperature, puts the same points at 32 °F and 212 °F. That gives 180 Fahrenheit degrees for every 100 Celsius degrees, which is where the 9/5 factor comes from.
Common uses
- Weather forecasts and travel abroad (most of the world reports Celsius).
- Oven and recipe temperatures from international cookbooks.
- Body temperature and medical readings.
Frequently asked questions
What is 0 °C in Fahrenheit?
Water freezes at 0 °C, which is 32 °F.
What is 37 °C in Fahrenheit?
Normal human body temperature, about 37 °C, is 98.6 °F.
At what temperature are Celsius and Fahrenheit equal?
They meet at -40: -40 °C is exactly -40 °F.
What is 100 °C in Fahrenheit?
Water boils at 100 °C at sea level, which is 212 °F.
What is the formula to convert Celsius to Fahrenheit?
°F = (°C × 9/5) + 32. This page applies it for you instantly as you type.
Last reviewed: November 2026.
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