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Degrees Fahrenheit to Kelvin Converter

Convert degrees Fahrenheit to kelvin instantly with this free degrees Fahrenheit to kelvin converter. Enter any value to get an accurate temperature conversion, plus the formula, the conversion factor and a full reference table.

What is 1 degree Fahrenheit in kelvin?

1 degree Fahrenheit is equal to 255.927778 kelvin.

1°F → 255.927778K using K = (°F − 32) × 5/9 + 273.15

Result255.9277778

1 degree Fahrenheit = 255.9277778 kelvin

Degrees Fahrenheit to Kelvin formula

K = (°F − 32) × 5/9 + 273.15

Temperature scales use an offset as well as a ratio, so degrees Fahrenheit and kelvin cannot be converted by multiplication alone.

Worked examples

  • -20 degrees Fahrenheit = 244.261111 kelvin — -20°F → 244.261111K using K = (°F − 32) × 5/9 + 273.15
  • 10 degrees Fahrenheit = 260.927778 kelvin — 10°F → 260.927778K using K = (°F − 32) × 5/9 + 273.15
  • 30 degrees Fahrenheit = 272.038889 kelvin — 30°F → 272.038889K using K = (°F − 32) × 5/9 + 273.15

Degrees Fahrenheit to Kelvin conversion table

Every value below is calculated with the exact conversion factor and rounded for display.

degrees Fahrenheit to kelvin conversion table
Degrees Fahrenheit (°F)Kelvin (K)
-40 °F233.15 K
-20 °F244.26111 K
-10 °F249.81667 K
0 °F255.37222 K
5 °F258.15 K
10 °F260.92778 K
15 °F263.70556 K
20 °F266.48333 K
25 °F269.26111 K
30 °F272.03889 K
35 °F274.81667 K
37 °F275.92778 K
40 °F277.59444 K
50 °F283.15 K
75 °F297.03889 K
100 °F310.92778 K

When you need to convert degrees Fahrenheit to kelvin

  • Setting an oven from a recipe written in the other scale.
  • Reading a weather forecast while travelling.
  • Interpreting a thermostat, fever reading or industrial spec sheet.

Getting a feel for the scale

A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.

Degree Fahrenheit (°F)

  • Water freezes at 32 °F and boils at 212 °F
  • Room temperature is about 70 °F

Kelvin (K)

  • 0 K is absolute zero
  • Room temperature is about 294 K

Common mistakes to avoid

  • Multiplying without applying the offset. Temperature scales do not share a zero point, so a plain conversion factor gives the wrong answer.
  • Converting a temperature difference the same way as a temperature. A change of 10 °C is a change of 18 °F, not 50 °F.
  • Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.

How precise does the answer need to be?

For weather and cooking, one decimal place is more than enough. Clinical and laboratory readings normally need 0.1° resolution, and scientific work should carry the full value through the calculation before rounding.

How these units are defined

  • Degree Fahrenheit (°F): The everyday US temperature scale: water freezes at 32 °F, boils at 212 °F. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
  • Kelvin (K): The SI base unit of temperature, starting at absolute zero. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.

Related conversions

Frequently asked questions

What is 1 degree Fahrenheit in kelvin?
1 degree Fahrenheit is equal to 255.927778 kelvin.
How many degrees Fahrenheit are in one kelvin?
There are -457.87 degrees Fahrenheit in 1 kelvin.
How do you convert degrees Fahrenheit to kelvin?
Use the formula K = (°F − 32) × 5/9 + 273.15.
What is 10 degrees Fahrenheit in kelvin?
10 degrees Fahrenheit is 260.927778 kelvin. 10°F → 260.927778K using K = (°F − 32) × 5/9 + 273.15.