Fahrenheit to Kelvin (°F → K)
Formula
K = (°F + 459.67) × 5/9Step-by-step
K = (0 + 459.67) × 5/9K = 459.67 × 5/9K = 255.3722222222222Conversion Table
| °F | K |
|---|---|
| 0 | 255.37 |
| 1.0000 | 255.93 |
| 2.0000 | 256.48 |
| 3.0000 | 257.04 |
| 4.0000 | 257.59 |
| 5.0000 | 258.15 |
| 6.0000 | 258.71 |
| 7.0000 | 259.26 |
| 8.0000 | 259.82 |
| 9.0000 | 260.37 |
| 10.000 | 260.93 |
| 11.000 | 261.48 |
| 12.000 | 262.04 |
| 13.000 | 262.59 |
| 14.000 | 263.15 |
| 15.000 | 263.71 |
| 16.000 | 264.26 |
| 17.000 | 264.82 |
| 18.000 | 265.37 |
| 19.000 | 265.93 |
| °F | K |
|---|---|
| 20.000 | 266.48 |
| 21.000 | 267.04 |
| 22.000 | 267.59 |
| 23.000 | 268.15 |
| 24.000 | 268.71 |
| 25.000 | 269.26 |
| 26.000 | 269.82 |
| 27.000 | 270.37 |
| 28.000 | 270.93 |
| 29.000 | 271.48 |
| 30.000 | 272.04 |
| 31.000 | 272.59 |
| 32.000 | 273.15 |
| 33.000 | 273.71 |
| 34.000 | 274.26 |
| 35.000 | 274.82 |
| 36.000 | 275.37 |
| 37.000 | 275.93 |
| 38.000 | 276.48 |
| 39.000 | 277.04 |
| °F | K |
|---|---|
| 40.000 | 277.59 |
| 41.000 | 278.15 |
| 42.000 | 278.71 |
| 43.000 | 279.26 |
| 44.000 | 279.82 |
| 45.000 | 280.37 |
| 46.000 | 280.93 |
| 47.000 | 281.48 |
| 48.000 | 282.04 |
| 49.000 | 282.59 |
| 50.000 | 283.15 |
| 51.000 | 283.71 |
| 52.000 | 284.26 |
| 53.000 | 284.82 |
| 54.000 | 285.37 |
| 55.000 | 285.93 |
| 56.000 | 286.48 |
| 57.000 | 287.04 |
| 58.000 | 287.59 |
| 59.000 | 288.15 |
| °F | K |
|---|---|
| 60.000 | 288.71 |
| 61.000 | 289.26 |
| 62.000 | 289.82 |
| 63.000 | 290.37 |
| 64.000 | 290.93 |
| 65.000 | 291.48 |
| 66.000 | 292.04 |
| 67.000 | 292.59 |
| 68.000 | 293.15 |
| 69.000 | 293.71 |
| 70.000 | 294.26 |
| 71.000 | 294.82 |
| 72.000 | 295.37 |
| 73.000 | 295.93 |
| 74.000 | 296.48 |
| 75.000 | 297.04 |
| 76.000 | 297.59 |
| 77.000 | 298.15 |
| 78.000 | 298.71 |
| 79.000 | 299.26 |
Fahrenheit to Kelvin Conversion
Converting Fahrenheit (°F) to Kelvin (K) is a common temperature conversion. 1 °F equals 255.927778 K. For example, 100 °F is equal to 310.927778 K.
Quick Mental Math: Fahrenheit to Kelvin
Subtract 32, multiply by 5/9, then add 273.15. For a shortcut, convert to Celsius first.
Why is converting Fahrenheit to Kelvin tricky?
This conversion combines a scale change and an offset, so it takes more than one clean step.
Quick Reference Values
-40 °F = 233.15 K. 0 °F = 255.37 K. 32 °F = 273.15 K. 68 °F = 293.15 K. 77 °F = 298.15 K. 98.6 °F = 310.15 K. 212 °F = 373.15 K.
What is Fahrenheit?
Fahrenheit (°F) is a unit of temperature. Fahrenheit is a temperature scale where water freezes at 32°F and boils at 212°F under standard atmospheric pressure. It defines temperature units based on intervals of 1/180th between these points. One degree Fahrenheit equals 5/9 of a kelvin or Celsius degree, making precise conversions essential in scientific and engineering contexts [cgpm-resolutions]. The Fahrenheit scale was created by Daniel Gabriel Fahrenheit in 1724 to provide a practical temperature measurement for weather and industrial processes. It was adopted widely in English-speaking countries and influenced early thermometry standards [nist-sp-811]. Fahrenheit remains the primary temperature scale in the United States and some Caribbean nations for everyday use. Scientific and international standards favor Celsius or kelvin, but Fahrenheit persists in HVAC, weather forecasting, and cooking within these regions [nist-sp-811].
What is Kelvin?
Kelvin (K) is a unit of temperature. Kelvin is the SI base unit of thermodynamic temperature defined by fixing the numerical value of the Boltzmann constant to 1.380649×10⁻²³ J·K⁻¹. It uses absolute zero as its null point and increments equal to those of the Celsius scale. One kelvin equals one degree Celsius in magnitude but starts at absolute zero, representing the lowest physically possible temperature [bipm-si-brochure]. The kelvin scale was named after William Thomson, 1st Baron Kelvin, who proposed an absolute thermodynamic temperature scale in 1848. It was formally adopted as an SI base unit in 1967–1968 by the CGPM to provide a universal temperature standard based on fundamental constants [cgpm-resolutions]. Kelvin is the standard temperature unit in scientific research, thermodynamics, and engineering worldwide. It is the official unit for temperature in physics and chemistry according to the International System of Units (SI), used globally including by NIST and BIPM member countries [nist-si-guide].
Common Misspellings
People often search for this conversion using these alternate spellings: fahranheit, farenheit, fahrentheit, farhenheit, kelvin degree, kelvins, kelvins unit, kelvian, kelvins scale. All of these refer to the Fahrenheit to Kelvin conversion.