Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit (and back) instantly as you type.
How to use celsius to fahrenheit converter
- Type a temperature into the Celsius field to see it in Fahrenheit, or into the Fahrenheit field to see it in Celsius.
- The conversion updates instantly as you type — no button to press.
- Copy the result with your mouse, or type into the other field to convert back.
Examples
Convert 100 °C (boiling point)
Water boils at 100 degrees Celsius, which is 212 °F.
Convert 37 °C (body temperature)
A normal body temperature of 37 °C is 98.6 °F on the Fahrenheit scale.
Convert 32 °F to °C (freezing point)
Water freezes at 32 °F. Typing into the Fahrenheit box converts back to 0 °C.
What is Celsius to Fahrenheit?
Celsius is the temperature scale used by most of the world — weather forecasts in Canada and Europe, oven settings outside the US, and laboratory work everywhere. Fahrenheit is still the everyday scale in the United States and a handful of other countries, so anyone comparing weather apps, following an American recipe, or reading a thermostat abroad ends up translating between the two constantly.
The conversion is linear: multiply Celsius by 9/5 and add 32 to get Fahrenheit, or subtract 32 from Fahrenheit and multiply by 5/9 to go the other way. A few anchors make the scales intuitive: water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F), normal body temperature is 37 °C (98.6 °F), and -40 is the one point where both scales read the same.
This converter applies the exact formula and rounds the display to a sensible precision. It works in both directions — type into either box. Everything runs locally in your browser with no server calls, so nothing you type is sent anywhere and the result updates with every keystroke.
Frequently asked questions
What is the formula for Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 and add 32: °F = °C × 9/5 + 32. To go from Fahrenheit to Celsius, subtract 32 and multiply by 5/9: °C = (°F − 32) × 5/9. For example, 20 °C × 9/5 + 32 = 68 °F.
Is this Celsius to Fahrenheit converter accurate?
Yes. It applies the exact conversion formula with floating-point arithmetic and rounds only the displayed result, so the output is correct up to the shown precision.
Why does the US use Fahrenheit instead of Celsius?
The United States inherited Fahrenheit from British colonial practice and never completed its metric transition, so Fahrenheit stuck for weather, cooking and thermostats. Science, medicine and most industry there use Celsius.
At what temperature are Celsius and Fahrenheit the same?
At -40 — that is the only point where the two scales agree. -40 °C equals exactly -40 °F, which makes it a handy sanity check for any temperature converter.
Does this tool send my data anywhere?
No. The conversion runs entirely in your browser with JavaScript. There is no server call, no upload and no tracking of what you type.