All temperature conversion formulas8/12/2023 This is the most widely used scale in the world. The term Celsius was adopted in 1948 by an international conference on weights and measures. That pressure criteria is often called an atmosphere, or more commonly, standard pressure. Centigrade means "consisting of or divided into 100 degrees " the Celsius scale, devised by Swedish Astronomer Andres Celsius (1701-1744) for scientific purposes, has 100 degrees between the freezing point of 0 degrees and boiling point of 100 degrees of pure water at sea level air pressure, 29.92 inches of mercury. The Celsius temperature scale is still sometimes referred In summary, add 40, ( F to C) multiply by Fraction.( C to F) multiply by the other, subtract 40. For the final calculation, remove the 40. To convert from C to F, try these calculations manually.ģ7 + 40 = 77, and 77 * 9/5 = 138.6. To convert from F to C, try these calculations manually.įor the final calculation, remove the 40. Thus, if you want to convert Fahrenheit ( F) to Celsius (C), then use the Fraction 5/9 Celsius ( C) to Fahrenheit (F), use the other, 9/5, which is Clearly not just a fraction.įor an example of this method, we'll use the values we used in the initial example, 98.6 F and 37 C, which are equal. 5/9 is always a Fraction while 9/5 is also a fraction, in this form, it is Clearly a whole number plus a fraction (1 and 4/5). (for Fahrenheit) begins with the same letter as Fraction. To remember whether to use 5/9 or 9/5 when converting from Fahrenheit to Celsius or Celsius to Fahrenheit, just simply remember, F Then, always subtract out the 40 you justĪdded to yield the final result. Next, multiply by 5/9 or 9/5 just like the first method. No matter which direction you want to covert, Fahrenheit to Celsius or Celsius to Fahrenheit, always first add 40 to the number. Then add 32 to 180 and get the final converted result of 212 degrees on the Fahrenheit scale.īelow is another accepted conversion method that works just as well and perhaps might be easier to remember. Using the stated formula, you first multiply the Celsius scale temperature reading by nine-fifths and get a result of 180. Tf = (9/5)*Tc+32 Tc = temperature in degrees Celsius, Tf = temperature in degrees FahrenheitĪssume that you have a Celsius scale temperature of 100 degrees and you wish to convert it into degrees on the Fahrenheit scale. As you might guess, it is the exact opposite of converting Fahrenheit to Celsius. Then you multiply 66.6 by five-ninthsĪnd get the converted value of 37 degrees Celsius.īelow is the formula to convert a Celsius scale temperature into degrees on the Fahrenheit(commonly misspelled Farenheit) scale. Using the above formula, you would first subtract 32 from the Fahrenheit temperature and get 66.6 as a result. Tc = (5/9)*(Tf-32) Tc = temperature in degrees Celsius, Tf = temperature in degrees Fahrenheitįor example, assume you have a Fahrenheit temperature of 98.6 degrees and you desire to convert it into degrees on the Celsius scale. The common scales for most temperature expressions are Celsius and Fahrenheit while Kelvin, Réaumur, and Rankine are used for specialized scientific applications. It is very important to follow the order of operations as different results can be obtained giving inaccurate results. The characters () represent order of calculations, / represents division, * represents multiplication, - subtraction, + addition and = is equal. In the formulas below, we use the mathematical standard computer conventions for algebraic and numeric expressions. Click on the Calculate button and the values for the other scales will appear in the appropriate boxes. To use the temperature scale converter, input any whole or decimal number into any one of the scale boxes. Simple Celsius to Farenheit Temperature Conversion Quick Celsius, Fahrenheit, Kelvin, Réaumur, and Rankine Temperature Conversion This still shows the formulae and has the calculator but the methodology of display is quite different.) Enjoy! (If your are a Type "A" personality and want to cut to the chase, try our faster, less word intense version. There is a chart below the converter that displays at a glance the important ranges of each scale. The formulas can teach the process and the converter will make your life easier. Though two of the five scales are not considered popular, there are still situations and applications that use them. We have also created a temperature converter from those formulae, for your use. We have created a listing of the formulas needed to convert temperature to and from Celsius, Fahrenheit, Kelvin, Réaumur, and Rankine. This converter requires the use of Javascript enabled and capable browsers. Celsius, Fahrenheit, Kelvin, Réaumur, and Rankine
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