Kelvin to Fahrenheit (K to °F) Converter
To convert Kelvin to Fahrenheit, use °F = (K − 273.15) × 9/5 + 32. For example, 300 K equals 80.33 °F. First shift Kelvin to Celsius by subtracting 273.15, then scale by 9/5 and add the 32-degree offset.
The formula
Combine the Kelvin-to-Celsius shift with the Celsius-to-Fahrenheit scaling:
°F = (K − 273.15) × 9/5 + 32
For example, (373.15 − 273.15) × 9/5 + 32 = 212 °F, the boiling point of water. The 9/5 factor reflects that a Fahrenheit degree is smaller than a Kelvin (or Celsius) degree.
Conversion table
| Kelvin (K) | Fahrenheit (°F) |
|---|---|
| 0 | -459.67 |
| 100 | -279.67 |
| 200 | -99.67 |
| 250 | -9.67 |
| 273.15 | 32 |
| 300 | 80.33 |
| 310.15 | 98.6 |
| 373.15 | 212 |
| 500 | 440.33 |
| 1000 | 1,340.33 |
How to convert online
- Type the Kelvin temperature into the first box.
- Read the Fahrenheit result instantly in the second box.
- Or enter a Fahrenheit value to convert back to Kelvin — it works both ways.
Use the Kelvin to Fahrenheit Converter — free and instant in your browser.
Where this conversion is used
Scientific temperatures are stated in Kelvin, but US audiences and many appliances read in Fahrenheit. Converting K to °F is handy when you translate physics or astronomy figures for an American readership, cross-check lab equipment, or present absolute temperatures in the scale people are used to at home.
FAQ
What is the formula to convert Kelvin to Fahrenheit?
°F = (K − 273.15) × 9/5 + 32. Subtract 273.15, multiply by 1.8, then add 32.
What is 0 K in Fahrenheit?
Zero Kelvin (absolute zero) equals -459.67 °F.
How do I convert Fahrenheit back to Kelvin?
Use K = (°F − 32) × 5/9 + 273.15. For example, 32 °F = 273.15 K.
Is the conversion exact?
Yes. The offsets 273.15 and 32 and the 9/5 factor are exact definitions, so results are precise.
Related converters
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Recommended reading
Kelvin to Celsius (K to °C) Converter
Kelvin to Celsius: subtract 273.15. °C = K − 273.15, so 300 K = 26.85 °C. Free instant converter with the exact formula and a reference table.
Fahrenheit to Kelvin (F to K) Converter and Formula
Convert Fahrenheit to Kelvin with K = (F-32) x 5/9 + 273.15. 100F = 310.93K. Formula, conversion table and instant two-way converter in your browser.
Fahrenheit to Celsius (F to C) Converter and Formula
Convert Fahrenheit to Celsius with C = (F-32) x 5/9. 100F = 37.78C. Full formula, conversion table and instant two-way converter in your browser.
Celsius to Kelvin Converter (°C to K) with Formula
Convert Celsius to Kelvin with the exact formula K = °C + 273.15. 100 °C = 373.15 K. Free reference table, worked examples and instant online tool.