Fahrenheit to Kelvin Converter
Convert Fahrenheit temperatures to Kelvin for scientific, engineering, and general reference purposes. The calculator combines the Fahrenheit-to-Celsius scale change with the Celsius-to-Kelvin offset.
Quick Answer
Kelvin = (Fahrenheit − 32) × 5/9 + 273.15
Convert Fahrenheit to Celsius first, then add 273.15. The combined formula is K = (°F − 32) × 5/9 + 273.15.
Kelvin as an Absolute Scale
Kelvin starts at absolute zero, where molecular thermal energy reaches its theoretical minimum. Scientific formulas often use kelvins because the scale has an absolute zero rather than an arbitrary reference point.
Checking the Result
A Kelvin result should not be negative for a physically meaningful temperature. Common reference points can help verify your calculation: 32°F is 273.15 K and 212°F is 373.15 K.
Examples
32°F = 273.15 K.
50°F = 283.15 K.
68°F = 293.15 K.
212°F = 373.15 K.
Quick Reference
- Kelvin is written as K.
- The conversion includes both a scale change and an offset.
- 0 K corresponds to −459.67°F.