Instant, two-way conversion across common engineering units.
1 °F = 255.92778 K(Fahrenheit → Kelvin)
To convert Fahrenheit to kelvin, subtract 32, multiply by 5/9, then add 273.15. Temperature scales use offsets as well as ratios, so a conversion formula is applied rather than a single multiplier.
Temperature scales have different zero points, so the values are matched at the same physical temperature rather than compared by size.
Fahrenheit (°F) is the temperature scale used in the United States.
The kelvin (K) is the SI base unit of thermodynamic temperature.
To convert Fahrenheit to kelvin, subtract 32, multiply by 5/9, then add 273.15. For example, 20 °F equals 266.48333 K.
Reverse the formula: subtract 273.15, multiply by 9/5, then add 32. The converter above works in both directions, so you can type into either field.
Celsius and Fahrenheit have different zero points, so a simple multiplier cannot work. Each conversion applies both a scale factor and an offset.
Water freezes at 0 °C or 32 °F and boils at 100 °C or 212 °F, so one Celsius degree covers 1.8 Fahrenheit degrees. The scales cross at -40.
Kelvin is the SI unit and starts at absolute zero, so it is used for thermal calculations, U-values and any scientific reporting. Temperature differences are identical in kelvin and Celsius.
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