This kelvin to degrees Fahrenheit converter turns any K reading into °F instantly, in your browser, with the formula shown so you can check the result by hand. Kelvin are an SI unit used in science and engineering; degrees Fahrenheit are a US customary unit. Water freezes at 273.15 K (32 °F) and boils at 373.15 K (212 °F) at sea level.
The formula is °F = (K − 273.15) × 9/5 + 32. For a quick mental estimate between Celsius and Fahrenheit, double the Celsius value and add 30; it is within a few degrees for everyday temperatures. Normal body temperature is 310.15 K, which is 98.6 °F.
K to °F formula
°F = (K − 273.15) × 9/5 + 32
Kelvin to Degrees Fahrenheit conversion table
| kelvin | degrees Fahrenheit | Rounded |
|---|---|---|
| 0 K | -459.67 °F | -46 |
| 100 K | -279.67 °F | -28 |
| 200 K | -99.67 °F | -99.7 |
| 250 K | -9.67 °F | -9.67 |
| 273.15 K | 32 °F | 32 |
| 293.15 K | 68 °F | 68 |
| 300 K | 80.33 °F | 80.3 |
| 310.15 K | 98.6 °F | 98.6 |
| 350 K | 170.33 °F | 17 |
| 373.15 K | 212 °F | 212 |
| 400 K | 260.33 °F | 26 |
| 500 K | 440.33 °F | 44 |
Frequently asked questions
How many degrees Fahrenheit are in 20 kelvin?
20 K = -423.67 °F. Apply the formula °F = (K − 273.15) × 9/5 + 32. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert kelvin to degrees Fahrenheit?
°F = (K − 273.15) × 9/5 + 32. Temperature scales have different zero points, so you cannot simply multiply; the offset matters. Worked example: 100 K = -279.67 °F.
Is -10 K the same as -477.67 °F?
Yes. -10 K = -477.67 °F, a common winter temperature. Notice that -40 is the one point where Celsius and Fahrenheit agree: -40 °C equals -40 °F.
How do I convert degrees Fahrenheit back to kelvin?
Reverse the formula: K = (°F − 32) × 5/9 + 273.15. Or use the degrees Fahrenheit to kelvin page linked above, which has its own table and examples.