How to convert degrees Fahrenheit to kelvin
K = (°F − 32) × 5/9 + 273.15
Example: 25 °F → 269.261 K
Temperature scales have different zero points, so you cannot convert them with a single multiplication factor.
Fahrenheit to Kelvin table
| Fahrenheit (°F) | Kelvin (K) |
|---|---|
| -40 °F | 233.15 K |
| -20 °F | 244.26111 K |
| -10 °F | 249.81667 K |
| 0 °F | 255.37222 K |
| 10 °F | 260.92778 K |
| 15 °F | 263.70556 K |
| 20 °F | 266.48333 K |
| 25 °F | 269.26111 K |
| 30 °F | 272.03889 K |
| 35 °F | 274.81667 K |
| 37 °F | 275.92778 K |
| 40 °F | 277.59444 K |
| 50 °F | 283.15 K |
| 60 °F | 288.70556 K |
| 80 °F | 299.81667 K |
| 100 °F | 310.92778 K |
| 150 °F | 338.70556 K |
| 200 °F | 366.48333 K |
About these units
Fahrenheit (°F): Fahrenheit (°F) puts water’s freezing point at 32° and boiling point at 212°. It is used for everyday temperatures in the United States.
Kelvin (K): The kelvin (K) is the SI unit of temperature. It starts at absolute zero (0 K = −273.15 °C) and uses the same step size as Celsius.
Frequently asked questions
How do you convert degrees Fahrenheit to kelvin?
To convert degrees Fahrenheit to kelvin, use K = (°F − 32) × 5/9 + 273.15. For example, 25 °F = 269.261 K.
How do I convert °F to K?
Use the formula K = (°F − 32) × 5/9 + 273.15. For example, 25 °F gives 269.261 K.
How do I convert kelvin back to degrees Fahrenheit?
Use the reverse formula on our Kelvin to Fahrenheit page, or press Swap in the converter above.
What is the Fahrenheit scale?
Fahrenheit (°F) puts water’s freezing point at 32° and boiling point at 212°. It is used for everyday temperatures in the United States.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every temperature unit at once? Use the Temperature Converter.