Fahrenheit ⇄ Kelvin Converter

This Fahrenheit to Kelvin converter is a fast, reliable tool for switching between two important temperature scales — Fahrenheit, used commonly in the U.S., and Kelvin, which is the absolute temperature scale used in science and engineering.

The Fahrenheit scale measures based on freezing and boiling points of water (32°F and 212°F), while Kelvin begins at absolute zero — the point at which all molecular motion stops. The conversion formula is: K = (°F + 459.67) × 5⁄9. This tool calculates that for you automatically.

To convert in reverse, the formula is: °F = (K × 9⁄5) − 459.67. Whether you’re a physics student, laboratory technician, or HVAC professional, this tool enables accurate and immediate bidirectional conversion.

Just enter a value in either field, and the other will update instantly. It’s optimized for all devices, so you can use it on mobile or desktop. The layout is clean and distraction-free, using responsive Tailwind CSS for quick loading and great readability.

The included conversion table highlights key values, including 32°F = 273.15 K (freezing point of water) and 212°F = 373.15 K (boiling point), making it easier to reference common benchmarks. These values are essential in everything from lab reports to heating systems.

Our converter is part of a broader suite of tools covering all temperature units like Celsius, Kelvin, Fahrenheit, Rankine, and more. It’s perfect for engineers, students, and anyone working internationally or across different scientific disciplines.

Bookmark this tool or share it with others who need quick and accurate temperature conversions without the need for apps, logins, or distractions. It’s always ready to use.