The formula
To convert °F to K, use: K = (°F − 32) × 5/9 + 273.15
Fahrenheit to Kelvin
Convert °F to K instantly — with the formula, a table, key reference temperatures, and a live calculator.
100 °F equals 310.93 K.
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Result (K)
°F to K table
| °F | K |
|---|---|
| -40 °F | 233.15 K |
| 0 °F | 255.37 K |
| 14 °F | 263.15 K |
| 32 °F | 273.15 K |
| 50 °F | 283.15 K |
| 68 °F | 293.15 K |
| 77 °F | 298.15 K |
| 86 °F | 303.15 K |
| 98.6 °F | 310.15 K |
| 100 °F | 310.93 K |
| 104 °F | 313.15 K |
| 122 °F | 323.15 K |
| 212 °F | 373.15 K |
K to °F (reverse)
| K | °F |
|---|---|
| 0 K | -459.67 °F |
| 100 K | -279.67 °F |
| 200 K | -99.67 °F |
| 250 K | -9.67 °F |
| 273.15 K | 32 °F |
| 293.15 K | 68 °F |
| 300 K | 80.33 °F |
| 310.15 K | 98.6 °F |
| 373.15 K | 212 °F |
Key temperatures
| Reference point | °F | K |
|---|---|---|
| Absolute zero | -459.67 °F | 0 K |
| Freezing point of water | 32 °F | 273.15 K |
| Comfortable room | 69.8 °F | 294.15 K |
| Body temperature | 98.6 °F | 310.15 K |
| Hot summer day | 104 °F | 313.15 K |
| Boiling point of water | 212 °F | 373.15 K |
How it scales
Freezing, body & boiling point
°F (°F)K (K)
Reference points in K
Why temperature conversions need an offset
Unlike length or speed, temperature scales have different zero points. Celsius starts at water's freezing point (0 °C), Kelvin at absolute zero (0 K = −273.15 °C), and Fahrenheit at a historical reference (0 °F ≈ −17.8 °C). That is why a single multiplier is not enough — you also need an offset.
Absolute zero is 0 K = −273.15 °C = −459.67 °F — nothing can be colder. For more pairs, use our temperature conversion hub.
Related conversions
Frequently asked questions
How do I convert °F to K?
Use the formula K = (°F − 32) × 5/9 + 273.15. For example, 25 °F equals 269.26 K.
What is the formula for °F to K?
The exact conversion formula is: K = (°F − 32) × 5/9 + 273.15.
What is 0 °F in K?
0 °F equals 255.37 K.
What is absolute zero?
Absolute zero is the lowest possible temperature: 0 K = −273.15 °C = −459.67 °F. Nothing can be colder.
Why can't I convert temperatures with a single factor?
Temperature scales have different zero points. Celsius starts at water's freezing point, Kelvin at absolute zero, and Fahrenheit at a historical reference. That is why conversions need an offset, not just a multiplier.
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