Whether you are scientific data and HVAC engineering specs, converting Fahrenheit to Kelvin by hand is easy to get wrong. This free converter gives you an instant, exact answer — 1 °F = 255.9277778 K — and runs entirely in your browser.
How to convert Fahrenheit to Kelvin
To convert a value from °F to K, subtract 32, multiply by 5/9, then add 273.15. For example: 266.4833333 K equals 20 °F converted with the formula, and 310.9277778 K equals 100 °F. Because the two scales do not share a zero point, a single multiplication factor is not enough — the offset must be applied too.
Going the other way, use the Kelvin to Fahrenheit converter.
Fahrenheit to Kelvin conversion table
| Fahrenheit (°F) | Kelvin (K) |
|---|---|
| -40 | 233.15 |
| 0 | 255.3722222 |
| 32 | 273.15 |
| 98.6 | 310.15 |
| 212 | 373.15 |
| 350 | 449.8166667 |
Other temperature conversions
Why use the HandyTools converter
Most unit converters upload your values to a server or bury you in ads. HandyTools performs the °F-to-K conversion locally on your device with instant bidirectional results — type in either box and both update at once. There is nothing to install, nothing to sign up for, and your numbers never leave your browser.