Kelvin to Fahrenheit Converter
°F = K × 9/5 − 459.67
Written without a degree sign: 300 K, not 300 °K.
1 kelvin equals -457.87 degrees Fahrenheit
How to convert Kelvin to Fahrenheit
These formulas convert temperature readings. For a temperature difference, use only the scale factor: do not add or subtract the zero-point offset.
°F = K × 9/5 − 459.67Multiplying by 9/5 converts the size of a degree, and the subtraction of 459.67 lines up the two zero points, which sit at different temperatures.
-423.67 °F = 20 × 9/5 − 459.67Written without a degree sign: 300 K, not 300 °K.
Kelvin to Fahrenheit conversion table
Common values in kelvins, converted to degrees Fahrenheit.
| Kelvins (K) | Degrees Fahrenheit (°F) |
|---|---|
| 0 | -459.67 |
| 10 | -441.67 |
| 20 | -423.67 |
| 25 | -414.67 |
| 30 | -405.67 |
| 37 | -393.07 |
| 50 | -369.67 |
| 100 | -279.67 |
Frequently asked questions
Is a change of 1 K the same as a change of 1 °F?
No. A change of 1 K is a change of 1.8 °F. Apply only the scale factor to a temperature difference; the offset applies to temperature readings.
About these units
kelvinK
The SI base unit of thermodynamic temperature. Its zero is absolute zero, so kelvin values are never negative.
Reference: BIPM SI Brochure (9th ed.).
degree Fahrenheit°F
Water freezes at 32 °F and boils at 212 °F at standard atmospheric pressure. The everyday scale in the United States.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.