Fahrenheit to Kelvin formula
K = (°F − 32) × 5/9 + 273.15
Convert to Celsius first, then add 273.15. Temperature scales need an offset as well as a multiplier, which is why they cannot be converted with a single ratio the way length or weight can. To go the other way, use the kelvin to fahrenheit converter.
Fahrenheit to Kelvin conversion table
Common fahrenheit to kelvin values, rounded for reading. The converter above keeps full precision.
| Fahrenheit | Kelvin |
|---|---|
| -40 °F | 233.15 K |
| -20 °F | 244.261 K |
| -10 °F | 249.817 K |
| 0 °F | 255.372 K |
| 5 °F | 258.15 K |
| 10 °F | 260.928 K |
| 15 °F | 263.706 K |
| 20 °F | 266.483 K |
| 25 °F | 269.261 K |
| 30 °F | 272.039 K |
| 37 °F | 275.928 K |
| 40 °F | 277.594 K |
| 50 °F | 283.15 K |
| 75 °F | 297.039 K |
| 100 °F | 310.928 K |
Worked example
To convert 10 °F to kelvin, apply the formula above: the result is 260.928 K. Temperature scales require an offset as well as a multiplier. Kelvin values below absolute zero are mathematically convertible but not physically meaningful.
Frequently asked questions
How do you convert Fahrenheit to Kelvin?
Convert to Celsius first, then add 273.15. The formula is K = (°F − 32) × 5/9 + 273.15.
What is 10 °F in K?
10 °F equals 260.928 K. Enter any other reading in the converter above to see it recalculated instantly.
How do I convert Kelvin back to Fahrenheit?
Reverse the formula, swap the units in the converter, or open the kelvin to fahrenheit page.
Related temperature conversions
Need a different pair? Open the full temperature converter to choose any two units.