Temperature is a physical quantity. At the household level the concept of temperature comes from the usual concepts of "hot" and "cold". Man invented several temperature measurement systems. Temperature is usually measured in degrees and is indicated by ° symbol. The most famous temperature scales, measured in degrees, are: Kelvin °K, Celsius °C, Fahrenheit °F, Reaumur °Re, Rankine °R. Here you can convert any of these temperature measure to another.