Utility
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin. Type into any field and the others update instantly.
Common Temperatures
Absolute Zero
-273.15°C / -459.67°F / 0K
Water Freezes
0°C / 32°F / 273.15K
Room Temp
20°C / 68°F / 293.15K
Body Temp
37°C / 98.6°F / 310.15K
Water Boils
100°C / 212°F / 373.15K
Sun Surface
5505°C / 9941°F / 5778K
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32. Example: 20°C × 9/5 + 32 = 68°F. Or just type into the Celsius field above and the Fahrenheit field updates automatically.
Why does Kelvin not use the degree symbol?
Kelvin is an absolute temperature scale, not a relative one. Temperatures in Kelvin are written as 'K' not '°K' — for example, 273.15 K, not 273.15°K. This is the SI standard.
Can Kelvin be negative?
No — 0 K (absolute zero) is the lowest possible temperature. Negative Kelvin temperatures are physically impossible. Our converter won't show negative Kelvin values even if you enter a negative Celsius or Fahrenheit.
Convert between Celsius, Fahrenheit, and Kelvin instantly. Type a value in any unit and the other two update in real time — no buttons to press.
Perfect for cooking (oven temperatures), science experiments, weather conversion, or travel planning. All calculation happens client-side with precise rounding.