Celsius to Fahrenheit Converter
Type any value and all four temperature scales update at once: Celsius, Fahrenheit, Kelvin and Rankine. Includes the formula and common reference temperatures.
All conversions happen in your browser. Nothing is sent to a server.
How to use this celsius to fahrenheit converter
- Type a value in any of the four fields — Celsius, Fahrenheit, Kelvin or Rankine.
- All other scales update instantly with the conversion formula shown.
- Tap a reference (boiling, freezing, body temp, oven) to load common values.
- Copy all four conversions with one click.
Frequently asked questions
What is the formula?
°F = °C × 9/5 + 32. Going the other way: °C = (°F − 32) × 5/9. Kelvin = °C + 273.15.
What is 100 °C in °F?
100 °C = 212 °F. Water boils at this temperature at standard pressure.
What is 0 °F in °C?
0 °F ≈ −17.78 °C. The two scales meet at −40 (−40 °C = −40 °F).
Why include Rankine?
Rankine is Fahrenheit's absolute scale (used in some US engineering). 0 °R is absolute zero.