Convert degree Fahrenheit to kelvin
Convert degrees Fahrenheit (°F) to kelvin (K) instantly.
1 °F =
255.9278 K
kelvin
Need the reverse? Convert kelvin to degree Fahrenheit →
Formula
K = (°F − 32) × 5/9 + 273.15
degree Fahrenheit to kelvin conversion table
About converting degrees Fahrenheit to kelvin
Fahrenheit to kelvin is a two-step conversion used in physics and engineering when a US temperature reading has to enter an equation that expects absolute temperature. Convert to Celsius first (subtract 32, scale by 5/9), then add 273.15.
Method & sources
Conversions use exact legal definitions rather than rounded approximations: 1 inch = 2.54 cm and 1 pound = 0.45359237 kg (fixed by the 1959 international yard and pound agreement), 1 mile = 1.609344 km, and 1 US liquid gallon = 3.785411784 litres. Temperatures convert with °F = °C × 9⁄5 + 32 and K = °C + 273.15. Results are rounded only for display.
- NIST Special Publication 811 — Guide for the Use of the SI
- NIST Handbook 44, Appendix C — General Tables of Units of Measurement
Page last updated: October 1, 2026
Frequently asked questions
How many kelvin are in a degree Fahrenheit?
One degree Fahrenheit equals 255.9278 kelvin. So 10 degrees Fahrenheit is 260.9278 kelvin. Use the converter above for any value.
What is the formula to convert degrees Fahrenheit to kelvin?
K = (°F − 32) × 5/9 + 273.15
Is the degree Fahrenheit-to-kelvin conversion exact?
Yes. Temperature scales convert by an exact formula, not an approximation, so the result is precise for any input.
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