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Temperature Unit Conversions

Conversion formulas among the various temperature scales - RF Cafe

This of temperature scale conversion formulas appeared in the November 1965 issue of "Electronics World" magazine.

You've heard of the Fahrenheit, Centigrade (Celsius), Kelvin, and Rankine temperature scales, but what about the Réaumur scale? This 1965 Electronics World magazine article presents all five along with formulas for converting between them. Each temperature scale is named in honor of its creator. Daniel Gabriel Fahrenheit came up with his scale where, under standard atmospheric pressure (14.7 lb/in2) pure water freezes at 32° and boils at 212°. Anders Celsius decided a more sensible temperature scale would place freezing water at 0° and boiling water at 100°. William Thomson, 1st Baron Kelvin set his scale, which has been adopted as the International System of Units standard, declares 0° to be absolute zero, where no thermal energy is present. William Rankine, of ideal heat engine fame, combined Fahrenheit's scale with Kelvin's absolute zero concept. Lastly, but not leastly, René Antoine Ferchault de Réaumur selected the freezing point of water to be 0° and the boiling point to be 80°, primarily to accommodate his preference of alcohol over mercury as a thermometer medium. There you have it - my version of the brief history of temperature scales.

Temperature Unit Conversions - RF Cafe

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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024


    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

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