# Rankine to Newton (°R to °N) Source: https://www.unitconvertercalculator.com/temperature/rankine-to-newton-scale/ To convert Rankine to Newton, use the formula: N = (R - 491.67) x 11/60. The Rankine scale is the absolute Fahrenheit scale used in US thermodynamic engineering, while the Newton scale is Isaac Newton's rarely-used temperature scale. Water freezes at 491.67 degrees R (0 N) and boils at 671.67 degrees R (33 N). ## Formula °R via Kelvin to °N ## Conversion Table | Rankine (°R) | Newton (°N) | |---|---| | 0 °R | -90.1395 °N | | 100 °R | -71.806166666667 °N | | 200 °R | -53.472833333334 °N | | 300 °R | -35.139499999999 °N | | 400 °R | -16.806166666667 °N | | 459 °R | -5.9895 °N | | 491.67 °R | 0 °N | | 500 °R | 1.5271666666674 °N | | 530 °R | 7.0271666666652 °N | | 559 °R | 12.343833333335 °N | | 600 °R | 19.860499999999 °N | | 671.67 °R | 33 °N | | 700 °R | 38.193833333334 °N | | 800 °R | 56.527166666665 °N | | 1000 °R | 93.193833333335 °N | ## Units ### Rankine (°R) An absolute temperature scale using Fahrenheit-sized degrees. 0 °R equals absolute zero. Used in some US engineering applications, especially thermodynamics. ### Newton (°N) A temperature scale devised by Isaac Newton around 1700. Water freezes at 0 °N and boils at 33 °N. Not to be confused with the newton unit of force. ## Background The Rankine scale was created by William Rankine, 1859, used in American aerospace and chemical engineering. The Newton scale was created by Isaac Newton, around 1700, barely adopted beyond his laboratory. Converting between them bridges different eras and different measurement philosophies in the history of thermometry. ## Good to Know The history of temperature measurement is the history of scientific collaboration and competition across borders. The Rankine scale (used in American aerospace and chemical engineering) and the Newton scale (barely adopted beyond his laboratory) represent different national contributions to solving the same fundamental problem: how to assign numbers to the sensation of hot and cold. ## FAQ ### How do you convert Rankine to Newton? Use the formula N = (R - 491.67) x 11/60. At the freezing point of water: 491.67 R = 0 N. At the boiling point: 671.67 R = 33 N. ### When would you need to convert Rankine to Newton? This conversion is needed when interpreting historical scientific records, comparing temperature data across different measurement traditions, or completing engineering calculations that mix temperature scales from different national standards. ### What are the key reference points for both scales? Water freezes at 491.67 R = 0 N. Water boils at 671.67 R = 33 N. These two fixed points anchor both scales and provide easy verification of any conversion calculation. ## Non-Frequently Asked Questions ### Is converting Rankine to Newton like translating between two dialects nobody speaks? More like translating between two dead languages that were never widely spoken. Rankine is still technically alive in American thermodynamic engineering - think of it as the Latin of temperature scales. Newton's temperature scale is fully extinct - more like Etruscan. Converting between them requires fluency in two obscure measurement traditions that have almost zero overlap in users. ### At what Newton temperature does a jet engine operate? A jet engine's combustion temperature of about 1,800 Kelvin (3,240 degrees Rankine) equals approximately 503 degrees Newton. Newton calibrated his scale for laboratory temperatures around human experience. A jet engine at 503 Newton degrees is so far beyond Newton's intended range that the number loses all intuitive meaning. ### Would merging Rankine and Newton into one scale solve any problems? It would solve no problems and create new confusion. Rankine starts at absolute zero and uses Fahrenheit-sized degrees. Newton starts at the freezing point of water and uses degrees roughly 3 times larger than Celsius degrees. Merging them would produce a Frankenstein scale with no natural reference points and no user community. 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