Rankine

Rankine is a unit of temperature measurement primarily used in the United States, especially in thermodynamics and engineering. It measures temperature the same way as Fahrenheit but starts from absolute zero—the point where all molecular motion stops. One Rankine equals one degree Fahrenheit, so a temperature difference of 1 °R is the same as 1 °F. This scale is useful in scientific calculations involving temperature, heat transfer, and thermodynamic cycles, as it aligns with absolute temperature measurements like Kelvin but with Fahrenheit-based increments.