Kelvin to Fahrenheit Converter
Convert kelvins to degrees Fahrenheit with a two-way calculator. The formula is °F = (K − 273.15) × 9/5 + 32. The chart below covers freezing, room, body and boiling temperatures.
How to convert kelvins to degrees Fahrenheit
Worked example: convert -5 K to °F. (-5 − 273.15) × 9/5 = -500.67, then add 32 to get -468.67 °F. Reverse it with K = (°F − 32) × 5/9 + 273.15.
Kelvins to degrees Fahrenheit chart
| Kelvins (K) | Degrees fahrenheit (°F) |
|---|---|
| 0 K | -459.67 °F |
| 100 K | -279.67 °F |
| 200 K | -99.67 °F |
| 250 K | -9.67 °F |
| 255 K | -0.67 °F |
| 273 K | 31.73 °F |
| 273.15 K | 32 °F |
| 280 K | 44.33 °F |
| 290 K | 62.33 °F |
| 293.15 K | 68 °F |
| 300 K | 80.33 °F |
| 310 K | 98.33 °F |
| 373 K | 211.73 °F |
| 400 K | 260.33 °F |
| 500 K | 440.33 °F |
| 600 K | 620.33 °F |
| 800 K | 980.33 °F |
| 1,000 K | 1,340.33 °F |
Degrees fahrenheit to kelvins (reverse)
| Degrees fahrenheit (°F) | Kelvins (K) |
|---|---|
| -40 °F | 233.15 K |
| -20 °F | 244.2611 K |
| 0 °F | 255.3722 K |
| 20 °F | 266.4833 K |
| 32 °F | 273.15 K |
| 40 °F | 277.5944 K |
| 50 °F | 283.15 K |
| 60 °F | 288.7056 K |
| 68 °F | 293.15 K |
| 70 °F | 294.2611 K |
| 75 °F | 297.0389 K |
| 80 °F | 299.8167 K |
About the kelvin and the degree Fahrenheit
Kelvin is the SI base unit of temperature and starts at absolute zero, so it has no negative values. A change of one kelvin equals a change of one degree Celsius. Scientists and engineers use it for gas laws, color temperature and cryogenics.
On the Fahrenheit scale water freezes at 32 degrees and boils at 212 degrees, so there are 180 degrees between the two. It is the everyday scale for weather, cooking and body temperature in the United States and a few other places.
Zero kelvins is -459.67 °F, and 100 K is -279.67 °F.
Everyday sizes in kelvins and degrees Fahrenheit
| Everyday example (approximate) | In kelvins | In degrees Fahrenheit |
|---|---|---|
| The coldest air temperature ever recorded | 183.95 K | -128.56 °F |
| A home freezer | 255.15 K | -0.4 °F |
| Water freezes | 273.15 K | 32 °F |
| A fridge | 277.15 K | 39.2 °F |
| A comfortable room | 294.15 K | 69.8 °F |
| A hot summer day | 308.15 K | 95 °F |
| Normal human body temperature | 310.15 K | 98.6 °F |
| A hot bath | 313.15 K | 104 °F |
Kelvins to degrees Fahrenheit FAQ
What is 0 K in °F?
0 K equals -459.67 °F. For reference, 100 K equals -279.67 °F.
How do I convert kelvins to degrees Fahrenheit without a calculator?
convert -5 K to °F. (-5 − 273.15) × 9/5 = -500.67, then add 32 to get -468.67 °F. Reverse it with K = (°F − 32) × 5/9 + 273.15. Convert to Celsius first (subtract 273.15), then multiply by 9/5 and add 32. Room temperature of 293 K is about 68 °F.
What is a home freezer in degrees Fahrenheit?
A home freezer is about 255.15 kelvins, which is -0.4 degrees Fahrenheit. Treat that as an approximate everyday figure rather than an official measurement.
Which scale does my country use, kelvins or degrees Fahrenheit?
Kelvin has no degree sign and starts at absolute zero (-273.15 °C); it is the same everywhere. Fahrenheit is used mainly in the United States and a few smaller countries; one Fahrenheit degree is 5/9 of a Celsius degree.