Enter a number representing a temperature in either the box or the box and click on the Calculate button. The converted temperature for the other scale will appear in that box. While you may use decimal input, the final result will be rounded to whole numbers. If you wish to have more accuracy to decimal places, try the Version 2 below this converter. Defaults are for freezing in both scales. Press the Reset button to clear any values in both boxes and reset them to the defaults of freezing. Celsius to Fahrenheit Conversion Precise Enter a number representing a temperature in either the box or the box and click on the Calculate button or anywhere else other than the data field. This uses an adaptation of the formula to do the conversion but as you will see, provides decimal accuracy. We have reversed the entry so as not to confuse the two calculators. This one is first, while the original is last. While you may use decimal input, the final result will be rounded to a maximum of 18 decimal places. How to Convert from Celsius to Fahrenheit We have created a listing of the formulas needed to convert temperature to and from both Celsius commonly misspelled celcius and Fahrenheit commonly misspelled Farenheit. We have also created a converter for your use. The formulas can teach the process and the converter will make your life easier. This requires the use of enabled and capable browsers. Using the above formula, you would first subtract 32 from the Fahrenheit temperature and get 66. Below is the formula to convert a Celsius scale temperature into degrees on the Fahrenheit scale. Using the stated formula, you first multiply the Celsius scale temperature reading by nine-fifths and get a result of 180. Then add 32 to 180 and get the final converted result of 212 degrees on the Fahrenheit scale. Below is another accepted conversion method that works just as well and perhaps might be easier to remember. No matter which direction you want to covert, to Celsius or to Fahrenheit, always first add 40 to the number. Then, always subtract out the 40 you just added to yield the final result. For an example of this method, we'll use the values we used in the initial example, 98. To convert from F to C, try these calculations manually. For the final calculation, remove the 40. For the final calculation, remove the 40. C to F multiply by the other, subtract 40. The term Celsius was adopted in 1948 by an international conference on weights and measures.

次のHuman comfort can extend beyond this range depending on humidity, air circulation and other factors. In certain fields, like science and engineering, and within a particular context, room temperature can mean different agreed-on ranges. In contrast, ambient temperature is the actual temperature of the air or other medium and surroundings in any particular place, as measured by a thermometer. It may be very different from usual room temperature, for example an unheated room in winter. Owing to variations in humidity and likely clothing, recommendations for summer and winter may vary; a suggested typical range for summer is 23—25. Some studies have suggested that thermal comfort preferences of men and women may differ significantly, with women on average preferring higher ambient temperatures. The 's standard for comfortable warmth is 18 °C 64 °F for normal, healthy adults who are appropriately dressed. For those with respiratory problems or allergies, they recommend no less than 16 °C 61 °F , and for the sick, disabled, very old or very young, a minimum of 20 °C 68 °F. This practice dates from before central heating, when room temperature in wine-drinking countries was considerably lower than it is today, usually in the range between 15 °C 59 °F and 18 °C 64 °F. It is therefore advised to serve red wine at a temperature of at most 18 °C 64 °F. The Wine Bible revised second ed.

次のA calibrated in degrees Celsius General information Unit of Temperature Symbol °C Named after Conversions x °C in. In the , the , , the and , remains the preferred scale for everyday temperature measurement. The degree Celsius symbol: °C can refer to a specific on the Celsius scale or a unit to indicate a difference between two temperatures or an. It is named after the Swedish astronomer 1701—1744 , who developed a similar temperature scale. Before being renamed to honor Anders Celsius in 1948, the unit was called centigrade, from the Latin centum, which means 100, and gradus, which means steps. Since 1743 the Celsius scale has been based on 0 °C for the freezing point of water and 100 °C for the boiling point of water at 1 pressure. Prior to 1743 the values were reversed i. The 1743 scale reversal was proposed by. This definition also precisely related the Celsius scale to the scale, which defines the of with symbol K. Until 19 May 2019, the temperature of the triple point of water was defined as exactly 273. This means that a temperature difference of one degree Celsius and that of one kelvin are exactly the same. This means that the triple point is now a measured value, not a defined value. An illustration of 's original thermometer. Note the reversed scale, where 100 is the freezing point of water and 0 is its boiling point. In his paper Observations of two persistent degrees on a thermometer, he recounted his experiments showing that the melting point of ice is essentially unaffected by pressure. He also determined with remarkable precision how the boiling point of water varied as a function of atmospheric pressure. He proposed that the zero point of his temperature scale, being the boiling point, would be calibrated at the mean barometric pressure at mean sea level. This pressure is known as one. In 1744, coincident with the death of Anders Celsius, the Swedish botanist 1707—1778 reversed Celsius's scale. In it, Linnaeus recounted the temperatures inside the orangery at the :. Temperatures on the centigrade scale were often reported simply as degrees or, when greater specificity was desired, as degrees centigrade symbol: °C. The plural form is degrees Celsius. The general rule of the is that the numerical value always precedes the unit, and a space is always used to separate the unit from the number, e. Other languages, and various publishing houses, may follow different typographical rules. However, this is a provided for with legacy encodings. It easily allows correct rendering for vertically written East Asian scripts, such as Chinese. For searching, treat these two sequences as identical. Thus, besides expressing specific temperatures along its scale e. Because of this dual usage, one must not rely upon the unit name or its symbol to denote that a quantity is a temperature interval; it must be unambiguous through context or explicit statement that the quantity is an interval. Celsius measurement follows an but not a ; and it follows a relative scale not an absolute scale. For example, an object at 20 °C does not have twice the energy of when it is 10 °C; and 0 °C is not the lowest Celsius value. Thus, degrees Celsius is a useful interval measurement but does not possess the characteristics of ratio measures like weight or distance. This practice is permissible because the magnitude of the degree Celsius is equal to that of the kelvin. In 1948, the definition was changed to use the triple point of water. In 2019, the definition was changed to use the , completely decoupling the definition of the kelvin from the. Each of these formal definitions left the numerical values of the Celsius scale identical to the prior definition to within the limits of accuracy of the of the time. When the melting and boiling points of water ceased being part of the definition, they became measured quantities instead. This is also true of the triple point. In 1948 when the 9th General Conference on Weights and Measures in Resolution 3 first considered using the triple point of water as a defining point, the triple point was so close to being 0. Thus, the actual melting point of ice is very slightly less than a thousandth of a degree below 0 °C. Also, defining water's triple point at 273. This boiling-point difference of 16. For example, an altitude change of only 28 cm 11 in causes the boiling point to change by one millikelvin. According to several writings of Dr. The 1948 adoption of Celsius accomplished three objectives: 1. All common temperature scales would have their units named after someone closely associated with them; namely, Kelvin, Celsius, Fahrenheit, Réaumur and Rankine. Notwithstanding the important contribution of Linnaeus who gave the Celsius scale its modern form, Celsius's name was the obvious choice because it began with the letter C. Thus, the symbol °C that for centuries had been used in association with the name centigrade could remain in use and would simultaneously inherit an intuitive association with the new name. Older definitions of the Celsius scale once defined the boiling point of water under one standard atmosphere as being precisely 100 °C. However, the current definition results in a boiling point that is actually 16. For more about the actual boiling point of water, see. A different approximation uses , which approximates the temperature to 99. Thus, if a temperature interval is, say, 10 K or 10 °C which may be written 10 kelvins or 10 degrees Celsius , it must be unambiguous through obvious context or explicit statement that the quantity is an interval. Celsius temperature scale, also called centigrade temperature scale, scale based on 0 ° for the melting point of water and 100 ° for the boiling point of water at 1 atm pressure. The Facts on File Dictionary of Weather and Climate. Handbook of Chemistry and Physics. University Physics with Modern Physics 12th ed.

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