Convert Kelvin to Fahrenheit
To convert kelvins to degrees Fahrenheit, use °F = K × 1.8 − 459.67: 300 K = 80.33 °F, and 0 K = -459.67 °F.
1 K = -457.87 °F
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk Kelvin to Fahrenheit converter to paste a column from Excel.
How to Convert Kelvin to Fahrenheit
- 1 K = -457.87 °F
- 1 °F = 255.9277778 K
- Example: convert 300 K to °F: 300 K = (300 × 1.8 − 459.67) °F = 80.33 °F
Formula
°F = K × 1.8 − 459.67
Derivation from SI units:
- SI base unit, fixed by the Boltzmann constant k = 1.380649 × 10⁻²³ J/K
- T(K) = (t(°F) + 459.67) × 5/9; t(°F) = t(°C) × 9/5 + 32
- Solving for °F: °F = K × 1.8 − 459.67
Both units are defined exactly, so the factor is exact. Kelvin definition: kelvin; Fahrenheit definition: degree Fahrenheit.
Worked examples
- Water boils at 373.15 K at sea level, which is 212 °F.
373.15 × 1.8 − 459.67 = 212 °F - The surface of the Sun, about 5778 K, is roughly 9940.73 °F.
5778 × 1.8 − 459.67 = 9940.73 °F
Kelvin to Fahrenheit conversion table
| Kelvin (K) | Fahrenheit (°F) |
|---|---|
| 0 K | -459.67 °F |
| 4.2 K | -452.11 °F |
| 77 K | -321.07 °F |
| 173.15 K | -148 °F |
| 233.15 K | -40 °F |
| 255.37 K | -0.004 °F |
| 273.15 K | 32 °F |
| 288.15 K | 59 °F |
| 293.15 K | 68 °F |
| 298.15 K | 77 °F |
| 310.15 K | 98.6 °F |
| 373.15 K | 212 °F |
| 500 K | 440.33 °F |
| 773.15 K | 932 °F |
| 1000 K | 1340.33 °F |
| 1273.15 K | 1832 °F |
| 1500 K | 2240.33 °F |
| 2000 K | 3140.33 °F |
| 5778 K | 9940.73 °F |
Where it's used
Converting kelvin to Fahrenheit is needed when SI results, cryogenic data or stellar temperatures are reported to US audiences.
Kelvin to other temperature units
| Conversion | 1 K equals |
|---|---|
| Kelvin to Celsius | -272.15 °C |
| Kelvin to Fahrenheit | -457.87 °F |
| Kelvin to Rankine | 1.8 °R |
Frequently asked questions
What is absolute zero in Fahrenheit?
0 K = -459.67 °F.
What is the formula for kelvins to degrees Fahrenheit?
°F = K × 1.8 − 459.67. For example, 300 K = 80.33 °F.
What is 0 K in °F?
0 K = -459.67 °F, and 100 K = -279.67 °F.
How do I convert a temperature difference from K to °F?
For a difference (an interval), ignore the offset and multiply by 1.8 only: a change of 10 K is a change of 18 °F.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Section 2.3.1, base unit definitions.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "degree Fahrenheit (°F)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Kelvin to Fahrenheit. Retrieved October 17, 2026, from https://scientificconverters.com/temperature/kelvin-to-fahrenheit/
IEEE
Scientific Converters, "Convert Kelvin to Fahrenheit," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/temperature/kelvin-to-fahrenheit/