Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin in real-time.
Temperature converter: Celsius, Fahrenheit and Kelvin
This temperature converter switches between Celsius (°C), Fahrenheit (°F) and Kelvin (K) instantly. Handy for cooking, travel, science and weather. It calculates in your browser.
Conversion formulas
°F = °C × 9/5 + 32 · °C = (°F − 32) × 5/9 · K = °C + 273.15
For example, 20 °C = 20 × 9/5 + 32 = 68 °F, and 20 °C = 293.15 K.
Reference points
- Water freezes at 0 °C = 32 °F.
- Water boils at 100 °C = 212 °F (at sea level).
- Body temperature is around 37 °C = 98.6 °F.
- Absolute zero is 0 K = −273.15 °C.
Vocabulary
Celsius is used almost worldwide; Fahrenheit mainly in the United States; Kelvin is the scientific unit, with no negative degrees, starting at absolute zero.
Frequently asked questions
What is 100 °F in °C? About 37.8 °C. And 0 °C in °F? 32 °F.
Why no degrees with Kelvin? It’s an absolute scale; you say "kelvin", not "degrees kelvin".
Quick mental trick? For rough °C to °F: double and add 30 (20 °C → ~70 °F).