Fahrenheit to Kelvin Converter
Convert degrees Fahrenheit to kelvins instantly. Type a value, change either unit, or press swap to go the other way.
20 degrees Fahrenheit = 266.48333 kelvins
How to convert degrees Fahrenheit to kelvins
K = (°F − 32) × 5/9 + 273.15
Temperature scales have different zero points, so the conversion needs both a multiplication and an offset rather than a single factor. Apply the formula above in the order shown.
Worked examples
- 0 °F: (0 − 32) × 5/9 + 273.15 = 255.37222 K
- 32 °F: (32 − 32) × 5/9 + 273.15 = 273.15 K
- 68 °F: (68 − 32) × 5/9 + 273.15 = 293.15 K
Subtract 32, multiply by 5/9, then add 273.15. For a quick estimate: kelvin is roughly (°F + 460) × 5/9.
Fahrenheit to Kelvin conversion table
Degrees Fahrenheit to Kelvins
| °F | K |
|---|---|
| -459.67 | 0 |
| -40 | 233.15 |
| 0 | 255.37222 |
| 32 | 273.15 |
| 68 | 293.15 |
| 98.6 | 310.15 |
| 212 | 373.15 |
| 350 | 449.81667 |
| 450 | 505.37222 |
| 1,000 | 810.92778 |
Kelvins to Degrees Fahrenheit
| K | °F |
|---|---|
| -459.67 | -1,287.076 |
| -40 | -531.67 |
| 0 | -459.67 |
| 32 | -402.07 |
| 68 | -337.27 |
| 98.6 | -282.19 |
| 212 | -78.07 |
| 350 | 170.33 |
| 450 | 350.33 |
| 1,000 | 1,340.33 |
When you need to convert degrees Fahrenheit to kelvins
Scientific and engineering formulas require absolute temperatures in kelvins, but US data, thermostats and ovens are in Fahrenheit. This converter goes straight from °F to K so you do not have to convert through Celsius by hand.
About the units
Degree Fahrenheit (°F)
Fahrenheit puts water's freezing point at 32 °F and boiling point at 212 °F. It is still used for weather, cooking and body temperature in the United States.
Kelvin (K)
Kelvin is the SI base unit of temperature. Zero kelvin is absolute zero, the coldest possible temperature, and one kelvin has the same size as one degree Celsius.
Frequently asked questions
What is the formula to convert degrees Fahrenheit to kelvins?
Use K = (°F − 32) × 5/9 + 273.15. For example, 32 °F becomes 273.15 K.
What is absolute zero in Fahrenheit?
Absolute zero (0 K) is −459.67 °F, or −273.15 °C. Nothing can be colder.
Can I convert other temperature units with this tool?
Yes. Use the From and To drop-downs in the converter to choose any temperature unit, or press the swap button to reverse the conversion. All calculations use internationally defined conversion factors.