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Temperature is an essential aspect of our daily lives, influencing everything from the weather conditions we experience to the functioning of various appliances and systems. However, different regions and scientific fields often utilize distinct temperature scales, with Fahrenheit, Celsius (also known as Celsius), and Kelvin being the most prevalent ones. Converting between these scales is crucial for communication, understanding global weather patterns, and conducting scientific research. In this guide, we will explore the methods and formulas for seamlessly converting between Fahrenheit, Celsius, and Kelvin, enabling you to effortlessly navigate temperature measurements and comprehend temperature-related information across different contexts.
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You can convert degrees Fahrenheit (degrees Fahrenheit) to degrees Celsius (degrees Celsius) or vice versa by performing basic addition, subtraction, multiplication, and division operations. When you encounter a temperature with the wrong unit, you can easily convert units in a snap!
Steps
Convert degrees Fahrenheit to degrees Celsius
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Learn the scale. The Fahrenheit and Celsius scales have different starting points – the freezing point of water in the Celsius scale is 0°, and in the Fahrenheit scale it’s 32°. Besides the starting point difference, both scales also have different increment rates. For example, the distance from freezing point to boiling point of water in the Celsius scale is 0-100°, and in the Fahrenheit scale it is 32-212°. [1] X Research Source
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Subtract 32 degrees Fahrenheit. Since the freezing point of water in the Fahrenheit scale is 32 and in the Celsius scale is 0, you can convert the value by subtracting 32 degrees Fahrenheit . [2] X Research Source
- For example, if you need to convert 74°F, you just need to subtract 74 from 32. So, 74-32 = 42. [3] X Research Source
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Divide the result by 1.8. The distance from freezing point to boiling point of water in the Celsius scale is 0-100, and in the Fahrenheit scale it is 32-212. That means that a distance of 180° in the Fahrenheit scale is equivalent to 100° in the Celsius scale. Thus, you will have a ratio of 180/100, after reducing the fraction to 1.8; To complete the conversion, simply divide the result in the step above by 1.8.
- For the example in step one, divide the result 42 by 1.8, and your calculation is 42/1.8 = 23°C. Thus, 74°F is converted to 23°C.
- Note: 1.8 is equivalent to 9/5. If you don’t have a calculator or prefer to do math with fractions, you can divide the result in the first step by 9/5 instead of 1.8.
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Check the result. Here are a few examples to help you see if you’re converting correctly. If your results do not match the results in the table, check the calculation again. Maybe you forgot to subtract before dividing.
| Fahrenheit | ºCelsius (approx.) |
|---|---|
| -40 | -40 |
| 0 | -18 |
| 32 | 0 |
| 60 | 16 |
| 100 | 38 |
| 150 | 66 |
| 212 | 100 |
Convert Celsius to Fahrenheit
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Learn the scale. Since the above method’s odds ratio formula is applied in reverse when you convert degrees Celsius to degrees Fahrenheit, you still use a difference of 32 and a difference of 1.8. However, the calculation will be performed in reverse order.
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Multiply Celsius by 1.8. If you want to convert the temperature from Celsius to Fahrenheit, you simply reverse the process. The first step is to multiply degrees Celsius by 1.8. [4] X Research Sources
Convert 30 degrees Celsius to degrees Fahrenheit. For example, if you want to convert 30°C, you need to first multiply the temperature by 1.8 or 9/5. Your calculation will be 30 x 1.8 = 54. [5] X Research Source
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Add 32 to the result you just found. Now the odds ratio has been adjusted, but you still have to adjust the starting point difference as in step one. To do this, you would add 32 to the Celsius multiplied by 1.8, and the final result is the Fahrenheit value.
- Add 32 by 54 in the result in step 3. You should get 54 + 32 = 86°F. Thus, 30°C is equivalent to 86°F.
Check answers. If your results do not match the results in this table, you probably made a mistake. Remember to multiply the temperature to be converted by 1.8 before adding 32.
| ºCelsius | Fahrenheit |
|---|---|
| -40 | -40 |
| 0 | 32 |
| 15 | 59 |
| 30 | eighty six |
| 60 | 140 |
| 100 | 212 |
| 200 | 392 |
Make comparisons. When you compare the two values, it’s easy to see that every 5°C equals 9°F:
| ºCelsius | Fahrenheit | ºCelsius | Fahrenheit | |
|---|---|---|---|---|
| -50 | -58 | 0 | 32 | |
| -45 | -49 | 5 | 41 | |
| -40 | -40 | ten | 50 | |
| -35 | -thirty first | 15 | 59 | |
| -30 | -22 | 20 | 68 | |
| -25 | -13 | 25 | 77 | |
| -20 | -4 | 30 | eighty six | |
| -15 | 5 | 35 | 95 | |
| -ten | 14 | 40 | 104 | |
| -5 | 23 | 45 | 113 | |
| 50 | 122 |
Learn the principles of conversion. The meaning of the 1.8 conversion factor is that every 1°C difference is equivalent to 1.8°F, and this is evident in the 10-15°C range:
| ºCelsius | Fahrenheit | ºCelsius | Fahrenheit | |
|---|---|---|---|---|
| -first | 30.2 | ten | 50 | |
| 0 | 32 | 11 | 51.8 | |
| first | 33.8 | twelfth | 53.6 | |
| 2 | 35.6 | 13 | 55.4 | |
| 3 | 37.4 | 14 | 57.2 | |
| 4 | 39.2 | 15 | 59 | |
| 5 | 41 | 16 | 60.8 | |
| 6 | 42.8 | 17 | 62.6 | |
| 7 | 44.6 | 18 | 64.4 | |
| 8 | 46.4 | 19 | 66.2 | |
| 9 | 48.2 | 20 | 68 |
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Round the value to an integer. When you round a Fahrenheit value, the difference in the conversion result from 5°C or 10°C usually has a difference of 2, 4, 5, 7:
| ºCelsius | ºFahrenheit (rounded) |
|---|---|
| 5 | 41 = 41+0 = 41-0 |
| 6 | 43 = 41+2 = 50-7 |
| 7 | 45 = 41+4 = 50-5 |
| 8 | 46 = 41+5 = 50-4 |
| 9 | 48 = 41+7 = 50-2 |
| ten | 50 = 50+0 = 50-0 |
| 11 | 52 = 50+2 = 59-7 |
| twelfth | 54 = 50+4 = 59-5 |
| 13 | 55 = 50+5 = 59-4 |
| 14 | 57 = 50+7 = 59-2 |
| 15 | 59 = 59+0 = 59-0 |
Convert Celsius to Kelvin (degrees K)
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Learn the scale. Scientists believe that the Celsius scale was developed from the Kelvin scale. [6] X Research Source Although the distance between degrees C and degrees K is larger than the distance between degrees C and degrees F, the common point between degrees C and degrees K is that the rate of increase is the same. While the ratio of the difference between degrees Celsius and degrees Fahrenheit is 1:1.8, the ratio between degrees Celsius and degrees K is 1:1. [7] X Research Sources
- You may find it strange to know that the freezing point of water on the Kelvin scale is 273.15 – a huge number, that’s because the Kelvin scale is calculated based on the absolute zero of 0K.
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Add 273.15 to Celsius. Although 0°C is the freezing point of water, according to scientists, 0°C equals 273.15K. [8] X Research Source Since the two scales have the same rate of increase, converting degrees Celsius to degrees K is simply an addition of 273.15.
- For example, if you want to convert 30°C, you just add 273.15 to that number. Your calculation will be 30 + 273.15 = 303.15K.
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Check answers. Here is a summary table of results to help you check if your answer is correct. The Celsius and Kelvin scales have the same rate of increase, so the two values always have an exact difference of 273.15.
- If the value to be converted is an integer, the result in the Kelvin scale is always in decimal 0.15.
- The lowest possible temperature is -273.15ºC = 0ºK. If the result after being converted to the Kelvin scale is negative, you may have made a mistake or the calculation has an invalid value.
ºCelsius kelvins -100 173.15 -50 223.15 0 273.15 50 323.15 100 373.15 200 473.15 500 773.15
Convert Kelvin to Celsius
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Learn the scale. The 1:1 ratio between the Celsius and Kelvin scales still applies when you convert degrees K to degrees Celsius. You just need to remember the number 273.15 and do the math as opposed to the Celsius to K conversion calculation. .
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Subtract 273.15 from K degrees. If you want to convert K to C, just do the reverse process by subtracting 273.15. Assuming you need to convert 280K, the only thing you need to do is subtract 280 from 273.15 to get the Celsius result: 280K – 273.15 = 6.85°C.
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Check the result. If your two values are not the same as suggested in the table, check the calculation again.
- If the degrees Kelvin to be converted is an integer, the result you get after converting to degrees Celsius is usually in decimal 0.15 (if degrees Celsius is negative) or 0.85 (if degrees Celsius is positive) .
- Note, degrees K and degrees C do not differ much when you convert large values. When you convert a value of 6 or more digits, the difference is usually very small.
kelvins ºCelsius 0 -273.15 5 -268.15 50 -223.15 200 -73.15 500 226.85 1,000 726.85 100,000 yen 99,700 . approx 10 million almost 10 million
Convert Kelvin to Fahrenheit
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Learn the scale. One of the most important factors that you need to remember when converting between degrees K and degrees F is the rate of increase. Since degrees K and degrees C have a 1:1 increment ratio, you can apply an increment between degrees F and C when converting K; that means for every 1K the difference in the Fahrenheit scale is 1.8°F. [9] X Research Source
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Multiply by 1.8. To convert in a 1K:1.8F ratio, the first step in converting degrees Kelvin to degrees Fahrenheit is to multiply by 1.8.
- For example, if you need a 295K temperature conversion, multiply that by 1.8. Thus, your calculation will be 295 x 1.8 = 531.
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Subtract 459.7 from the result. Similar to adjusting the starting point of the scale by adding 32 when converting degrees Celsius to degrees Fahrenheit, you must also perform this step when converting degrees K to Fahrenheit. However, 0K = -459.7°F . [10] X Research Source Since we add positive numbers with negative numbers, the calculation becomes subtraction.
- You just need to subtract 531,531 from 459.7 to get the calculation 531 – 459.7 = 71.3°F. So 295K = 71.3°F.
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Check answers. If the conversion result is not the same as the result in the table, you need to check the calculation again. Maybe you made a mistake or forgot to multiply before subtracting.
- If the Kelvin value to be converted is an integer, your answer after converting to degrees Fahrenheit will be in decimal 0.67 (if degrees Fahrenheit is negative) or 0.33 (if degrees Fahrenheit is positive). .
kelvins Fahrenheit 0 -459.67 5 -450.67 50 -369.67 200 -99.67 500 440.33 1,000 yen 1.340.33 100,000 won approx 180,000
Convert degrees Fahrenheit to degrees Kelvin
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Subtract 32 degrees Fahrenheit. To convert degrees Fahrenheit to degrees K, the easiest way is to convert to Celsius, and then convert that value to degrees K. That means we will take the temperature to convert. change minus 32.
- For example, if you need to convert 82°F, subtract that number from 32: 82 – 32 = 50.
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Multiply the result by 5/9. The next step in the Fahrenheit to Celsius conversion process is to multiply the result in the first step by 5/9, or divide it by 1.8 if you have a calculator.
- So, 50 x 5/9 = 27.7 – now degrees Fahrenheit has been converted to degrees Celsius.
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Add 273.15 to the result you just found. Since the difference between Celsius and K is 273.15, you can add 273.15 when converting the value to Kelvin.
- Your calculation is 273.15 + 27.7 = 300.8. Therefore, 82°F = 300.8K.
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Check answers. Compare your results with the answers in the table to see if you converted correctly. If you find another answer, check the calculation again. You need to do the subtraction before you multiply.
| Fahrenheit | kelvins (approx.) |
|---|---|
| -25 | 241 |
| 0 | 255 |
| 32 | right 273.15 |
| 70 | 294 |
| 100 | 311 |
| 150 | 339 |
| 212 | exactly 373.15 |
Advice
- Double-check the calculation so you are more confident with the final result.
- Remember that degrees Kelvin is always 273.15° higher than degrees Celsius.
- You can also use the formula C = 5/9(F – 32) to convert degrees F to degrees C, and 9/5C = F – 32 to convert degrees C to degrees F. This is a simple formula from equation: C/100=(F-32)/180 . Since the freezing point is within the 212 limit of the F thermometer, we have to subtract 32 from the Fahrenheit (F-32), then 212 minus 32, and that’s why we have a divisor of 180. This has been done. Now, both sides are equal and we have the “long” equation.
- If the information is used in countries that do not use the words “centigrade” or “Celsius”, you should use ‘°C’.
- Note, the Kelvin scale does not use the degree symbol like the Fahrenheit and Celsius scales.
- If you get a negative result when converting the value to degrees Kelvin, double-check the calculation. The lowest number is 0K aka absolute zero.
- A few important conversion values to remember are as follows:
- Water freezes at 0°C or 32°F.
- Body temperature is usually 37°C or 98.6°F.
- Water boils at 100°C or 212°F.
- At -40, both scales are equal.
- 280 degrees Kelvin can be converted to 101.62 degrees Fahrenheit without measuring Kelvin.
X
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You can convert degrees Fahrenheit (degrees Fahrenheit) to degrees Celsius (degrees Celsius) or vice versa by performing basic addition, subtraction, multiplication, and division operations. When you encounter a temperature with the wrong unit, you can easily convert units in a snap!
In conclusion, converting between Fahrenheit, Celsius and Kelvin is a relatively straightforward process once you understand the formulas and relationships between these temperature scales. By memorizing the conversion formulas and implementing them correctly, anyone can convert temperatures from one scale to another with ease. It is important to note that while Fahrenheit is commonly used in the United States, Celsius and Kelvin are more widely accepted around the world, especially in scientific and academic communities. Therefore, having a solid understanding of these conversions is not only beneficial for practical purposes but also for better communication and understanding of temperature measurements globally. The ability to convert between these temperature scales is a valuable skill that can be useful in a variety of fields, such as meteorology, physics, and engineering. Overall, understanding how to convert between Fahrenheit, Celsius, and Kelvin allows for greater flexibility and comprehension when dealing with temperature measurements and enhances one’s ability to communicate and work collaboratively in scientific and academic settings.
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