Kelvin to Fahrenheit Converter
Type a value in kelvins to see it in degrees Fahrenheit as you type, with the exact formula and a reference chart.
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- Degrees Celsius
- 26.85 °C
How this was calculated
- °F = K × 9/5 − 459.67
- 300 × 9/5 − 459.67 = 80.33 °F
| 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 |
| 310.15 K | 98.6 °F |
| 350 K | 170.33 °F |
| 373.15 K | 212 °F |
| 400 K | 260.33 °F |
| 500 K | 440.33 °F |
| 1,000 K | 1,340.33 °F |
| 2,700 K | 4,400.33 °F |
| 5,000 K | 8,540.33 °F |
| 5,778 K | 9,940.73 °F |
| 6,500 K | 11,240.3 °F |
| °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 |
How to convert kelvins to degrees Fahrenheit
°F = K × 9/5 − 459.67. Multiply the kelvins by 9/5, then subtract 459.67. The kelvin is the SI unit of temperature; 0 K is absolute zero and 0 °C is exactly 273.15 K. The Fahrenheit scale puts water's freezing point at 32 °F and boiling at 212 °F; absolute zero is −459.67 °F. A Fahrenheit degree is 5/9 of a kelvin, so the conversion scales the number and shifts the zero point.
Worked examples
- 273.15 kelvins = 32 °F (273.15 × 9/5 − 459.67 = 32 °F)
- 300 kelvins = 80.33 °F (300 × 9/5 − 459.67 = 80.33 °F)
- 5,778 kelvins = 9,940.73 °F (5,778 × 9/5 − 459.67 = 9,940.73 °F)
Where this conversion comes up
Kelvins are used for science, color temperature of light bulbs and cameras; degrees Fahrenheit for weather, ovens and body temperature in the US. Multiply by 9/5, then subtract 459.67: 300 K is 80.33 °F and the Sun's surface (5,778 K) is 9,941 °F. Light-bulb color temperatures (2,700–6,500 K) describe the glow of a heated body, not room temperature.
Quick estimate
Multiply by 1.8 and subtract 460 (exact: 459.67).
Common mistakes
- Forgetting the offset. Multiplying by 9/5 alone is not enough: the Fahrenheit and kelvin scales have different zero points, so the subtraction 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 fahrenheit to kelvin converter. Related temperature converters: celsius to kelvin, kelvin to celsius.
Frequently asked questions
How do you convert kelvins to degrees Fahrenheit?
Multiply the kelvins by 9/5, then subtract 459.67. For example, 300 kelvins is 80.33 degrees Fahrenheit.
What is the formula for kelvins to degrees Fahrenheit?
°F = K × 9/5 − 459.67. The kelvin is the SI unit of temperature; 0 K is absolute zero and 0 °C is exactly 273.15 K. The Fahrenheit scale puts water's freezing point at 32 °F and boiling at 212 °F; absolute zero is −459.67 °F.
What is 5,778 kelvins in degrees Fahrenheit?
5,778 kelvins is 9,940.73 degrees Fahrenheit.
Is there a quick way to estimate kelvins to degrees Fahrenheit?
Multiply by 1.8 and subtract 460 (exact: 459.67).