Kelvin to Fahrenheit Converter
Convert kelvins to degrees Fahrenheit instantly — with formula, examples and table.
Enter any number above and the result updates as you type. Everything runs locally in your browser, so it is instant and private.
Formula: °F = (K − 273.15) × 9/5 + 32. For example, 20 K equals -423.67 °F.
How to convert kelvins to degrees Fahrenheit
°F = (K − 273.15) × 9/5 + 32
The kelvin starts at absolute zero (−273.15 °C), the coldest temperature physically possible. It is the SI base unit used throughout science.
Fahrenheit places freezing at 32° and boiling at 212°, giving 180 finer-grained degrees between them. It remains the everyday scale of the United States.
Kelvin to Fahrenheit conversion table
| Kelvin (K) | Fahrenheit (°F) |
|---|---|
| -40 K | -531.67 °F |
| -30 K | -513.67 °F |
| -20 K | -495.67 °F |
| -10 K | -477.67 °F |
| -5 K | -468.67 °F |
| 0 K | -459.67 °F |
| 5 K | -450.67 °F |
| 10 K | -441.67 °F |
| 15 K | -432.67 °F |
| 20 K | -423.67 °F |
| 25 K | -414.67 °F |
| 30 K | -405.67 °F |
| 35 K | -396.67 °F |
| 37 K | -393.07 °F |
| 40 K | -387.67 °F |
| 45 K | -378.67 °F |
Need the opposite direction? Use the Fahrenheit to Kelvin converter, or read our complete guide to temperature conversions for every formula in one place.
Frequently asked questions
What is the formula to convert Kelvin to Fahrenheit?
°F = (K − 273.15) × 9/5 + 32. For example, 25 K equals -414.67 °F.
What is 100 K in °F?
100 K equals -279.67 °F, using the formula °F = (K − 273.15) × 9/5 + 32.
Is my data stored when I use this converter?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is sent to a server, logged or stored.