Fahrenheit to Kelvin Converter
Type a value in degrees Fahrenheit to see it in kelvins as you type, with the exact formula and a reference chart.
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- Degrees Celsius
- 37 °C
How this was calculated
- K = (°F + 459.67) × 5/9
- (98.6 + 459.67) × 5/9 = 310.15 K
| °F | K |
|---|---|
| -459.67 °F | 0 K |
| -100 °F | 199.817 K |
| -40 °F | 233.15 K |
| 0 °F | 255.372 K |
| 32 °F | 273.15 K |
| 50 °F | 283.15 K |
| 68 °F | 293.15 K |
| 70 °F | 294.261 K |
| 98.6 °F | 310.15 K |
| 100 °F | 310.928 K |
| 150 °F | 338.706 K |
| 212 °F | 373.15 K |
| 300 °F | 422.039 K |
| 350 °F | 449.817 K |
| 400 °F | 477.594 K |
| 500 °F | 533.15 K |
| 1,000 °F | 810.928 K |
| K | °F |
|---|---|
| 0 K | -459.67 °F |
| 50 K | -369.67 °F |
| 100 K | -279.67 °F |
| 150 K | -189.67 °F |
| 200 K | -99.67 °F |
| 250 K | -9.67 °F |
| 273.15 K | 32 °F |
| 280 K | 44.33 °F |
| 290 K | 62.33 °F |
| 293.15 K | 68 °F |
| 298.15 K | 77 °F |
| 300 K | 80.33 °F |
How to convert degrees Fahrenheit to kelvins
K = (°F + 459.67) × 5/9. Add 459.67 to the degrees Fahrenheit, then multiply by 5/9. The Fahrenheit scale puts water's freezing point at 32 °F and boiling at 212 °F; absolute zero is −459.67 °F. The kelvin is the SI unit of temperature; 0 K is absolute zero and 0 °C is exactly 273.15 K. A Fahrenheit degree is 5/9 of a kelvin, so the conversion scales the number and shifts the zero point.
Worked examples
- 32 degrees Fahrenheit = 273.15 K ((32 + 459.67) × 5/9 = 273.15 K)
- 98.6 degrees Fahrenheit = 310.15 K ((98.6 + 459.67) × 5/9 = 310.15 K)
- 212 degrees Fahrenheit = 373.15 K ((212 + 459.67) × 5/9 = 373.15 K)
Where this conversion comes up
Degrees Fahrenheit are used for weather, ovens and body temperature in the US; kelvins for science, color temperature of light bulbs and cameras. Add 459.67, then multiply by 5/9: 32 °F (freezing) is 273.15 K and 212 °F (boiling) is 373.15 K. Absolute zero is −459.67 °F, and a Fahrenheit degree is 5/9 of a kelvin.
Quick estimate
Subtract 32, multiply by 5/9, then add 273.
Common mistakes
- Forgetting the offset. Multiplying by 9/5 alone is not enough: the Fahrenheit and kelvin scales have different zero points, so the addition of 459.67 is part of the formula. Kelvins are written as K, not °K, and never go below 0 K.
- Rounding the offset. Use 459.67 exactly; rounding it to 460 shifts every result by 0.33 °F (0.18 K).
Going the other way? Use the kelvin to fahrenheit converter. Related temperature converters: celsius to kelvin, kelvin to celsius.
Frequently asked questions
How do you convert degrees Fahrenheit to kelvins?
Add 459.67 to the degrees Fahrenheit, then multiply by 5/9. For example, 98.6 degrees Fahrenheit is 310.15 kelvins.
What is the formula for degrees Fahrenheit to kelvins?
K = (°F + 459.67) × 5/9. The Fahrenheit scale puts water's freezing point at 32 °F and boiling at 212 °F; absolute zero is −459.67 °F. The kelvin is the SI unit of temperature; 0 K is absolute zero and 0 °C is exactly 273.15 K.
What is 212 degrees Fahrenheit in kelvins?
212 degrees Fahrenheit is 373.15 kelvins.
Is there a quick way to estimate degrees Fahrenheit to kelvins?
Subtract 32, multiply by 5/9, then add 273.