Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly.
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
To convert Celsius to Fahrenheit, multiply the Celsius value by 9/5 and then add 32. For example, 100°C equals (100 × 9/5) + 32 = 212°F. This formula is the standard conversion used worldwide and is essential for cooking, weather forecasting, and scientific applications where different temperature scales are used across different countries and disciplines.
What is the freezing point of water in different scales?
Water freezes at 0°C (Celsius), 32°F (Fahrenheit), and 273.15 K (Kelvin). The Celsius and Fahrenheit scales are most common in everyday life, while Kelvin is used in scientific contexts because it starts at absolute zero — the theoretical lowest temperature possible. Understanding these reference points helps you quickly estimate conversions without a calculator.
What is absolute zero in Celsius and Fahrenheit?
Absolute zero is 0 K (Kelvin), which equals −273.15°C or −459.67°F. At this temperature, all molecular motion theoretically stops. It is the coldest possible temperature in the universe and serves as the foundation for the Kelvin scale used in thermodynamics and physics research. No object has ever been cooled to exactly absolute zero, though experiments have come extremely close.