Celsius to Fahrenheit Converter
Two-way converter: change Celsius to Fahrenheit or Fahrenheit to Celsius in one step.
Type a value in either field for an instant conversion
About converting Celsius and Fahrenheit
The Celsius scale is used in most of the world, while Fahrenheit is standard in the United States. Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F), so this conversion helps when reading US weather forecasts, recipes, and manuals.
To convert Celsius to Fahrenheit, multiply by 9/5 and add 32: °F = °C × 9/5 + 32. To go the other way, subtract 32 and multiply by 5/9: °C = (°F − 32) × 5/9. This converter handles both directions automatically.
Every calculation runs locally in your browser and updates instantly — nothing is uploaded, and the result appears the moment you type.
Why use this converter
Works both ways
Convert °C to °F or °F to °C by typing in either field.
Exact formula
Uses the standard temperature conversion formula with no shortcuts.
No install
Runs in any browser on phone or desktop, with no sign-up required.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply the °C value by 9/5 and add 32. For example, 20 °C = 20 × 9/5 + 32 = 68 °F.
How do I convert Fahrenheit to Celsius?
Subtract 32 from the value and multiply by 5/9. For example, 100 °F = (100 − 32) × 5/9 ≈ 37.8 °C.
How many Fahrenheit is 0 °C?
0 °C equals 32 °F — the freezing point of water on both scales.
At what temperature do the scales match?
Celsius and Fahrenheit read the same at −40 degrees: −40 °C = −40 °F.
What is normal body temperature in °F?
37 °C equals 98.6 °F, the figure most often quoted for normal body temperature.