Fahrenheit is a temperature scale based on one proposed in 1724 by the physicist Daniel Gabriel Fahrenheit (1686–1736) that uses the degree Fahrenheit as the unit. It is named after the astronomer and physicist Gabriel Fahrenheit (1686–1736). On the original scale, the freezing point of water is 32 degrees, and the boiling point 212 degrees. The unit is also known as Farenheit or Reaumur. In science and in cooking, the Fahrenheit scale is commonly used in the USA. This temperature scale was named after an astronomer named Gabriel Daniel Fahrenheit (1686-1736). The Celsius unit of temperature is named after a Swedish astronomer Anders Celsius (1701-1744).

The rankine temperature unit, also known as the absolute thermodynamic temperature scale, is a non-SI metric unit of measurement for temperature. It is used in a variety of engineering contexts and usually expressed in kelvins (K). The Rankine scale was invented by the Scottish engineer William John Macquorn Rankine. Rankine temperature is a heat energy in British and American units of measurement. It is used extensively in the steam power industry, as it is suitable for working with saturated steam. The Rankine temperature scale was created by the Scottish engineer and physicist William John Macquorn Rankine (1820-1872). He set absolute zero at -459.67 °F (-273.15 °C) and the boiling point of water at 707.2 °F (374.6 °C). This means that a 1:1 mixture of water and ice has a temperature of 32°F (0°C), while a 1:1 mixture of steam and water has a temperature of 212°F (100°C).