EngiRef / Temperature conversion
Convert Degrees Fahrenheit to Kelvin (°F to K)
K = °F × 0.555555556 + 255.372222. Convert degrees Fahrenheit to Kelvin with the exact formula, a common-values table and a free converter.
Conversion formula
K = °F × 0.555555556 + 255.372222
Temperature scales set their zero in different places, so this is an offset conversion, not a ratio. There is no single number you can multiply by: °F 0 is 255.372222 K, and doubling the input does not double the result. Apply the multiplier, then the offset, in that order.
°F to K table
| Degrees Fahrenheit (°F) | Kelvin (K) |
|---|---|
| 0 °F | 255.372222 K |
| 1 °F | 255.927778 K |
| 2 °F | 256.483333 K |
| 5 °F | 258.15 K |
| 10 °F | 260.927778 K |
| 20 °F | 266.483333 K |
| 50 °F | 283.15 K |
| 100 °F | 310.927778 K |
Every figure is computed at build time by the site’s own converter from the temperature unit registry. For a value that is not listed, put it into the interactive converter.
Frequently asked questions
What is 1 °F in K?
1 °F is 255.927778 K. Because temperature scales are offset rather than proportional, this figure is not a multiplier: 100 °F is 310.927778 K, not 100 times 255.927778.
What is the formula to convert degrees Fahrenheit to Kelvin?
K = °F × 0.555555556 + 255.372222. Apply the multiplier first, then the offset. Every value in the table on this page is computed with that formula by the same converter the tool below runs.
How do I convert Kelvin back to degrees Fahrenheit?
Use the inverse formula, °F = K × 1.8 - 459.67. The K to °F page carries the same table in that direction.