ConvBolt — Unit ConverterKelvin to Degrees Fahrenheit Converter
Converting kelvin to degrees Fahrenheit is a multiplication by a fixed factor: 1 K = -457.87 °F. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because the two scales have different zero points, not just different step sizes, this pair is the one people most often get wrong by treating it as a simple multiply.
Kelvin and the degree scales differ by an offset, not a ratio: -459.67 °F corresponds to 0 K, so the arithmetic is a shift plus a scale step. That offset is also why a small rounding error in kelvin can look alarming once it is restated in fahrenheit — the number you see is the sum of two operations, not one.
Kelvin to Degrees Fahrenheit formula
Use this formula to convert any kelvin value to degrees Fahrenheit:
Worked example: 100 K × -457.87 = -279.67 °F.
Kelvin to Degrees Fahrenheit conversion table
| Kelvin (K) | Degrees Fahrenheit (°F) |
|---|---|
| -40 K | -531.67 °F |
| 0 K | -459.67 °F |
| 10 K | -441.67 °F |
| 20 K | -423.67 °F |
| 30 K | -405.67 °F |
| 37 K | -393.07 °F |
| 50 K | -369.67 °F |
| 100 K | -279.67 °F |
| 150 K | -189.67 °F |
| 200 K | -99.67 °F |
| 300 K | 80.33 °F |
How to convert kelvin to degrees Fahrenheit
Multiply the kelvin value by -457.87 to get the equivalent in degrees Fahrenheit. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Degrees Fahrenheit to Kelvin converter instead of dividing by hand; both pages use the same source factors. For every other K conversion in one place, see the K conversion hub.
Frequently asked questions
How many degrees Fahrenheit are in 1 kelvin?
1 kelvin = -457.87 °F.
What is 100 kelvin in degrees Fahrenheit?
100 K = -279.67 °F.
Is converting kelvin to degrees Fahrenheit the same as degrees Fahrenheit to kelvin?
No — the direction changes the multiplier. The reverse conversion (1 °F = 255.9278 K) is on the Degrees Fahrenheit to Kelvin page.
Related conversions
Try the ConvBolt Unit Converter for any other temperature unit, browse the Temperature conversions, or read our conversion guides.