What is ordinary and absolute temperature scale in SI system and English system?

In the SI system, the absolute temperature scale is measured in Kelvin (K), where 0 K represents absolute zero, the theoretical point where all thermal motion ceases. The ordinary temperature scale in the SI system is Celsius (°C), which is based on the freezing and boiling points of water. In the English system, temperature is typically measured in degrees Fahrenheit (°F) for ordinary use, while absolute temperature is often expressed in Rankine (°R), where absolute zero is 0 °R and the size of the degree is the same as that of Fahrenheit.