Fahrenheit to Kelvin Converter
Convert temperature between Fahrenheit (°F) and Kelvin (K) instantly. Enter a value in either field below and the converter will update automatically — no need to press a button.
What is Fahrenheit?
Fahrenheit is a temperature scale primarily used in the United States. On this scale, water freezes at 32°F and boils at 212°F at standard atmospheric pressure.
What is Kelvin?
Kelvin is the base unit of temperature in the International System of Units (SI), primarily used in science and engineering. It starts at absolute zero (0 K), the theoretical point where all molecular motion stops, and does not use negative values.
Fahrenheit to Kelvin Formula
To convert Fahrenheit to Kelvin, subtract 32, multiply by 5/9, then add 273.15:
To convert Kelvin back to Fahrenheit, use the reverse formula:
Common Uses
- Scientific research and laboratory measurements
- Astronomy and space temperature readings
- Physics and chemistry calculations involving absolute temperature
- Engineering and industrial process control
- Weather and climate science data
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Frequently Asked Questions
What is 98.6°F in Kelvin?
98.6°F (normal human body temperature) equals approximately 310.15 K.
What is 0 K in Fahrenheit?
0 K (absolute zero) equals approximately −459.67°F, the coldest theoretically possible temperature.
Why doesn’t the Kelvin scale use degrees or negative numbers?
Kelvin is an absolute temperature scale that starts at absolute zero, the point where molecular motion theoretically stops, so there are no temperatures below 0 K and the unit is written simply as “K” without a degree symbol.