How to Convert Between Fahrenheit, Celcius and Kelvin

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.

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]

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]

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

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

Learn the scale. Scientists believe that the Celsius scale was developed from the Kelvin scale. ^[6] 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]

• 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.

Add 273.15 to Celsius. Although 0°C is the freezing point of water, according to scientists, 0°C equals 273.15K. ^[8] 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.

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

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. .

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.

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

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]

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.

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] 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.

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

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.

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.

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.