Fahrenheit to Kelvins
Convert fahrenheit to kelvins instantly. Exact formula, worked example and table. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert fahrenheit to kelvins
To convert fahrenheit to kelvins, apply the formula below. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
K = (°F − 32) × 5/9 + 273.15
What is a fahrenheit?
Water freezes at 32° and boils at 212°. Still standard in the United States for weather and cooking.
What is a kelvin?
The SI temperature scale, starting at absolute zero. No degree sign is used with kelvin.
The formula
K = (°F − 32) × 5/9 + 273.15
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Fahrenheit to Kelvins
- Type the number of fahrenheit you want to convert.
- Read the result in kelvins straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked kelvins to fahrenheit page.
Fahrenheit to Kelvins — frequently asked questions
How many kelvins are in a fahrenheit?
Use the formula K = (°F − 32) × 5/9 + 273.15 — this pair needs an offset as well as a factor.
What is the formula to convert fahrenheit to kelvins?
The formula is K = (°F − 32) × 5/9 + 273.15. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this fahrenheit to kelvins free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
How accurate is the result?
The maths is exact for the formula shown on the page. Accuracy in the real world depends on your inputs and on assumptions the formula cannot see, so treat the output as a well-grounded estimate rather than a quote.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error