Fahrenheit to Kelvin Converter
32 degrees Fahrenheit = 273.15 Kelvin
Conversion formula
K = (F - 32) x 5/9 + 273.15
To convert Fahrenheit to Kelvin, first convert to Celsius by subtracting 32 and multiplying by 5/9, then add 273.15 for Kelvin. Alternatively: K = (F + 459.67) x 5/9.
Fahrenheit to Kelvin Table
| Fahrenheit (°F) | Kelvin (K) |
|---|---|
| -459.67 | 0 |
| -40 | 233.15 |
| 0 | 255.372 |
| 32 | 273.15 |
| 68 | 293.15 |
| 98.6 | 310.15 |
| 212 | 373.15 |
| 350 | 449.817 |
| 500 | 533.15 |
| 1000 | 810.928 |
1 fahrenheit in every temperature unit
About Fahrenheit to Kelvin
The Fahrenheit-to-Kelvin conversion combines two steps: first converting to Celsius, then adding 273.15 to get Kelvin. This conversion bridges American everyday temperature readings with the scientific absolute temperature scale.
In practical terms: your body temperature of 98.6 F is 310.15 K. Room temperature at 72 F is 295.37 K. A freezer at 0 F is 255.37 K, and absolute zero - the coldest possible temperature - is -459.67 F (0 K).
This conversion matters in American science education, where students learn temperatures in Fahrenheit at home but must use Kelvin in physics and chemistry classes. The ideal gas law PV = nRT requires Kelvin: a gas at 72 F must be entered as 295.37 K.
Industrial applications in the US often record temperatures in Fahrenheit but need Kelvin for engineering calculations. A furnace operating at 1,000 F is running at 810.93 K. Steel annealing at 1,500 F corresponds to 1,088.71 K.
There is also a simpler combined formula: K = (F + 459.67) / 1.8. This works because -459.67 F is absolute zero (0 K), and the Fahrenheit degree is 5/9 the size of a Kelvin.
The Rankine scale is the Fahrenheit-equivalent of Kelvin - an absolute scale starting at 0 but using Fahrenheit-sized degrees. Rankine = Fahrenheit + 459.67.
Frequently Asked Questions
How do you convert Fahrenheit to Kelvin?
Use the formula K = (F - 32) x 5/9 + 273.15. First convert to Celsius, then add 273.15. Example: 212 F = (212-32) x 5/9 + 273.15 = 373.15 K.
What is absolute zero in Fahrenheit?
Absolute zero (0 K) is -459.67 degrees Fahrenheit. This is the coldest possible temperature.
What is 98.6 F in Kelvin?
98.6 F (normal body temperature) equals 310.15 K.
Is there a shortcut for F to K?
Yes: K = (F + 459.67) / 1.8. This single-step formula adds 459.67 to shift to absolute zero, then divides by 1.8 to convert from Fahrenheit-sized degrees to Kelvin-sized degrees.