To convert degrees Fahrenheit to kelvins, use K = (°F − 32) × 5/9 + 273.15. For example, 100 °F = 310.928 K.
How to convert Fahrenheit to Kelvin
- Type the value in degrees Fahrenheit.
- The answer in kelvins appears instantly, with the formula.
- Use ⇄ to swap the direction, or pick other units.
Fahrenheit to Kelvin formula
K = (°F − 32) × 5/9 + 273.15
Example: 100 °F = 310.928 K.
Reverse: 1 K = -457.87 °F (see Kelvin to Fahrenheit).
Fahrenheit to Kelvin conversion table
| Fahrenheit (°F) | Kelvin (K) |
|---|---|
| -40 | 233.15 |
| 0 | 255.372 |
| 10 | 260.928 |
| 20 | 266.483 |
| 32 | 273.15 |
| 40 | 277.594 |
| 50 | 283.15 |
| 60 | 288.706 |
| 68 | 293.15 |
| 70 | 294.261 |
| 75 | 297.039 |
| 80 | 299.817 |
| 90 | 305.372 |
| 95 | 308.15 |
| 98.6 | 310.15 |
| 100 | 310.928 |
| 102 | 312.039 |
| 104 | 313.15 |
| 110 | 316.483 |
| 120 | 322.039 |
| 140 | 333.15 |
| 160 | 344.261 |
| 180 | 355.372 |
| 212 | 373.15 |
| 300 | 422.039 |
| 350 | 449.817 |
| 375 | 463.706 |
| 400 | 477.594 |
| 425 | 491.483 |
| 450 | 505.372 |
About these units
Fahrenheit (°F): Water freezes at 32 °F and boils at 212 °F. Used for weather in the US.
Kelvin (K): The SI unit of temperature. 0 K is absolute zero (−273.15 °C).
Frequently asked questions
How do you convert Fahrenheit to Kelvin?
Use K = (°F − 32) × 5/9 + 273.15. For example, 100 °F = 310.928 K.
What is 100 °F in Celsius?
About 37.8 °C. A body temperature of 100.4 °F (38 °C) or higher is usually considered a fever.
Updated October 2026 · Built and tested by Sharjeel Tahir · How our tools are tested