Converting kelvins to degrees Fahrenheit requires a temperature-scale formula, not just multiplication. For reference: 0 K = -459.67 °F, 20 K = -423.67 °F, 37 K = -393.07 °F, 100 K = -279.67 °F. Use the calculator below for any value, or scan the conversion table for common readings.
FormulaDegrees Fahrenheit = Kelvins × 1.8
Quick
How to convert kelvins to degrees Fahrenheit
1
Start with your value
Begin with your temperature in kelvins.
2
Apply the conversion formula
°F = (K − 273.15) × 9/5 + 32
3
Read the result
The result is the equivalent temperature in degrees Fahrenheit. For example, 100 K = -279.67 °F.
Conversion formula
Temperature conversion is affine, not a single multiplication. The exact formula is shown below — it follows directly from the definitions of the kelvin and degree Fahrenheit scales.
°F = (K − 273.15) × 9/5 + 32
Kelvins to Degrees Fahrenheit conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
Conversion table from kelvins to degrees Fahrenheit
Kelvins (K)
Degrees Fahrenheit (°F)
-50 K
-549.67 °F
-40 K
-531.67 °F
-30 K
-513.67 °F
-25 K
-504.67 °F
-20 K
-495.67 °F
-15 K
-486.67 °F
-10 K
-477.67 °F
-5 K
-468.67 °F
-2 K
-463.27 °F
-1 K
-461.47 °F
0 K
-459.67 °F
1 K
-457.87 °F
2 K
-456.07 °F
5 K
-450.67 °F
10 K
-441.67 °F
15 K
-432.67 °F
18 K
-427.27 °F
20 K
-423.67 °F
21 K
-421.87 °F
22 K
-420.07 °F
23 K
-418.27 °F
24 K
-416.47 °F
25 K
-414.67 °F
27 K
-411.07 °F
28 K
-409.27 °F
30 K
-405.67 °F
32 K
-402.07 °F
35 K
-396.67 °F
37 K
-393.07 °F
40 K
-387.67 °F
45 K
-378.67 °F
50 K
-369.67 °F
55 K
-360.67 °F
60 K
-351.67 °F
65 K
-342.67 °F
70 K
-333.67 °F
75 K
-324.67 °F
80 K
-315.67 °F
85 K
-306.67 °F
90 K
-297.67 °F
95 K
-288.67 °F
100 K
-279.67 °F
110 K
-261.67 °F
120 K
-243.67 °F
150 K
-189.67 °F
180 K
-135.67 °F
200 K
-99.67 °F
250 K
-9.67 °F
300 K
80.33 °F
500 K
440.33 °F
Real-world reference
Absolute zero is 0 K. Water freezes at 273.15 K. Room temperature is around 293 K.
Frequently asked questions
What is 0 kelvins in degrees Fahrenheit?
0 K equals -459.67 °F.
What is 100 kelvins in degrees Fahrenheit?
100 K equals -279.67 °F.
How do I convert kelvins to degrees Fahrenheit?
Use the formula: °F = (K − 273.15) × 9/5 + 32.
What does a normal body temperature look like in degrees Fahrenheit?
A healthy human body temperature is about 37 °C, 98.6 °F, or 310.15 K.
At what kelvin does water freeze?
Water freezes at 273.15 K = 32 °F.
At what kelvin does water boil at 1 atm?
Water boils at 373.15 K = 212 °F.
Can the result be negative?
Yes. Temperature scales other than Kelvin can go below zero. Liquid nitrogen, for example, sits around −196 °C (−320 °F).
Are these results exact?
Conversion formulas are mathematically exact; results are stored as IEEE 754 doubles and rounded for display. The internal calculation matches the formula to within 1 part in 10^15.
About the kelvin and the degree Fahrenheit
The kelvin
The kelvin (K) is the SI base unit of thermodynamic temperature. Since the 2019 SI redefinition it is defined by fixing the Boltzmann constant to exactly 1.380649 × 10⁻²³ J/K. Zero kelvin is absolute zero, the lowest temperature theoretically possible. The kelvin is preferred in science and engineering because it has a true zero — temperature ratios become physically meaningful, unlike on the Celsius or Fahrenheit scales. Note: by convention there is no degree sign — 300 K, not 300 °K.
The degree Fahrenheit
The degree Fahrenheit (°F) is the customary temperature scale in the United States, defined since 1968 such that water freezes at exactly 32 °F and boils at exactly 212 °F at standard pressure — giving 180 Fahrenheit degrees over a range of 100 Celsius degrees. The scale was proposed in 1724 by Daniel Gabriel Fahrenheit, who calibrated zero against a brine ice bath. To convert °F to °C, subtract 32 then multiply by 5/9.