# What is *temperature difference*?

**Temperature Difference**is the difference between two temperatures of the same scale.

## Input

**Degree Rankine**is similar to the Kelvin scale in that it starts at absolute zero and 0°R is the same as 0K (Kelvin), but in temperature difference, the change of 1°R is the same as a change of 1°F and not 1K.

## Output

**Kelvin**is the base unit of temperature in the International System of Units (SI). In temperature difference, 1K is the same as 1°C (Degree Celsius).