Degrees Fahrenheit to kelvins
1 degree Fahrenheit = 255.928 kelvins
Type a value in degrees Fahrenheit (°F) to get kelvins (K) straight away. Both units belong to temperature, measured here against the kelvin.
1 °F = 255.92778 K
Formula
K = (°F − 32) × 5/9 + 273.15
Convert to Celsius first, then add 273.15. Here °F is the value in degrees Fahrenheit and K is the result in kelvins.
Worked example: 98.6 degrees Fahrenheit: put 98.6 into K = (°F − 32) × 5/9 + 273.15. The result is 310.15 kelvins.
Degrees Fahrenheit to kelvins table
| degrees Fahrenheit (°F) | kelvins (K) |
|---|---|
| -40 °F | 233.15 K |
| -20 °F | 244.261 K |
| -10 °F | 249.817 K |
| 0 °F | 255.372 K |
| 10 °F | 260.928 K |
| 15 °F | 263.706 K |
| 20 °F | 266.483 K |
| 25 °F | 269.261 K |
| 30 °F | 272.039 K |
| 35 °F | 274.817 K |
| 37 °F | 275.928 K |
| 40 °F | 277.594 K |
| 50 °F | 283.15 K |
| 60 °F | 288.706 K |
| 70 °F | 294.261 K |
| 80 °F | 299.817 K |
| 90 °F | 305.372 K |
| 100 °F | 310.928 K |
Everyday degrees Fahrenheit in kelvins
| What it is | °F | K |
|---|---|---|
| a home freezer (about) | 0 °F | 255.372 K |
| a fridge | 40 °F | 277.594 K |
| room temperature | 68 °F | 293.15 K |
| body temperature | 98.6 °F | 310.15 K |
| a moderate oven | 350 °F | 449.817 K |
Quick estimate in your head
Add 273 to the °C value after converting °F to °C.
Watch out for
- For a temperature change (not a reading), use only the 1.8 factor: a rise of 10 °C is a rise of 18 °F, not 50 °F.
- Kelvin has no degree sign and never goes negative. 0 °C is 273.15 K.
About the units
Degree Fahrenheit (°F). Water freezes at 32 °F and boils at 212 °F. Used for weather and cooking in the US.
Kelvin (K). The SI temperature unit. 0 K is absolute zero; a 1 K step is the same size as 1 °C.
Going the other way, 1 kelvin is -457.87 degrees Fahrenheit.
Questions
How many kelvins are in 1 degree Fahrenheit?
1 degree Fahrenheit is 255.928 kelvins, and 1 kelvin is -457.87 degrees Fahrenheit.
How do I convert degrees Fahrenheit to kelvins?
Use K = (°F − 32) × 5/9 + 273.15. For example, 98.6 degrees Fahrenheit: put 98.6 into K = (°F − 32) × 5/9 + 273.15. The result is 310.15 kelvins.
At what temperature are Celsius and Fahrenheit equal?
At −40. −40 °C is exactly −40 °F, which is a quick way to check a formula.
How much is a moderate oven in kelvins?
350 °F is 449.817 K.
Source for the conversion factor: BIPM SI Brochure (kelvin and degree Celsius).
Related conversions
- kelvins to degrees Fahrenheit
- degrees Fahrenheit to degrees Celsius
- degrees Celsius to kelvins
- kelvins to degrees Celsius
- degrees Celsius to degrees Fahrenheit