Fahrenheit to Kelvin Converter
Convert Fahrenheit to kelvin — subtract 32, multiply by 5/9, then add 273.15. Results update as you type; exact factors shown.
One degree Fahrenheit is 255.9278 kelvins — see the exact factor, not a rounded rule of thumb.
How the fahrenheit to kelvin converter works
Celsius and Fahrenheit are offset scales, so the conversion is not a simple multiplication: °F = °C × 9/5 + 32 and °C = (°F − 32) × 5/9. Kelvin has the same size of degree as Celsius but starts at absolute zero: K = °C + 273.15. The two scales meet at −40°.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
Common temperature conversions
| From | To | Units |
|---|---|---|
| -459.67 °F | 0 K | degrees Fahrenheit to kelvins |
| -40 °F | 233.15 K | degrees Fahrenheit to kelvins |
| 0 °F | 255.3722 K | degrees Fahrenheit to kelvins |
| 32 °F | 273.15 K | degrees Fahrenheit to kelvins |
| 68 °F | 293.15 K | degrees Fahrenheit to kelvins |
| 98.6 °F | 310.15 K | degrees Fahrenheit to kelvins |
| 100 °F | 310.9278 K | degrees Fahrenheit to kelvins |
| 212 °F | 373.15 K | degrees Fahrenheit to kelvins |
| 300 °F | 422.0389 K | degrees Fahrenheit to kelvins |
| 500 °F | 533.15 K | degrees Fahrenheit to kelvins |
| 1,000 °F | 810.9278 K | degrees Fahrenheit to kelvins |
| 1,832 °F | 1,273.15 K | degrees Fahrenheit to kelvins |
Units in this converter and their exact factors
| Unit | Symbol | To kelvin |
|---|---|---|
| degree Celsius | °C | x+273.15 |
| degree Fahrenheit | °F | (x-32)×5÷9+273.15 |
| kelvin | K | x |
FAQFrequently asked questions about temperature conversion
What is the formula?
K = (°F − 32) × 5/9 + 273.15 — Fahrenheit to Celsius first, then the offset.
What is absolute zero in Fahrenheit?
−459.67°F.
What is room temperature in kelvin?
About 293 K, or 68°F.
Why go through Celsius?
Because a kelvin is the same size as a Celsius degree, so only the scaling from Fahrenheit needs doing first.
Is there a negative kelvin?
Not on this scale — 0 K is the coldest possible, so anything below it is meaningless.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.