Temperature Unit Converter | Convert between Celsius, Fahrenheit, Kelvin and more
Online temperature unit converter that supports precise conversion between Celsius, Fahrenheit, Kelvin, Rankine and other temperature scales, providing professional results and reference knowledge.
Temperature Unit Knowledge
Temperature Unit Basics
Temperature is a physical quantity expressing the degree of heat of an object. The basic unit of temperature in the International System of Units (SI) is Kelvin (K), but Celsius (°C) and Fahrenheit (°F) are more commonly used in daily life.
Celsius (°C)
Proposed by Swedish astronomer Anders Celsius, it sets the freezing point of water at 0°C and the boiling point at 100°C. Celsius is used in most countries around the world for meteorology, scientific research, and everyday life.
Fahrenheit (°F)
Proposed by German physicist Daniel Gabriel Fahrenheit, it sets the freezing point of water at 32°F and the boiling point at 212°F. Fahrenheit is primarily used in the United States and a few other countries, especially in meteorology and daily life.
Kelvin (K)
Proposed by British physicist William Thomson (Lord Kelvin), it is based on absolute zero (the theoretical lowest temperature). Zero Kelvin (0K) corresponds to about -273.15°C and is the fundamental temperature unit used in scientific research. Kelvin has no negative values and does not use the term 'degree'.
Temperature Unit Conversion
- Celsius to Fahrenheit conversion: °F = °C × 9/5 + 32 or °C = (°F - 32) × 5/9
- Celsius to Kelvin conversion: K = °C + 273.15 or °C = K - 273.15
- Fahrenheit to Kelvin conversion: K = (°F + 459.67) × 5/9 or °F = K × 9/5 - 459.67.