UnitConFahrenheit to Kelvin Converter
Convert Fahrenheit to Kelvin for thermodynamic calculations, scientific research, and engineering work that starts from US temperature inputs. This two-step conversion is less common than Celsius-Kelvin but important in US scientific and industrial contexts.
Formula
Subtract 32 from Fahrenheit, multiply by 5/9, then add 273.15 to get Kelvin. To reverse, subtract 273.15, multiply by 9/5, and add 32.
Quick reference
| Fahrenheit (°F) | Kelvin (K) |
|---|---|
| 0 | 255.3722 |
| 32 | 273.15 |
| 50 | 283.15 |
| 68 | 293.15 |
| 98.6 | 310.15 |
| 100 | 310.9278 |
| 150 | 338.7056 |
| 200 | 366.4833 |
| 212 | 373.15 |
| 300 | 422.0389 |
About these units
Fahrenheit
Fahrenheit was the dominant scientific temperature scale in the English-speaking world through the 18th and early 19th centuries. As the metric system spread and Celsius was adopted internationally, Fahrenheit remained entrenched in US civilian use.
Kelvin
The Kelvin scale anchors to absolute zero (-273.15°C), making it the natural unit for thermodynamics. It is required in equations like the ideal gas law, Stefan-Boltzmann law, and Boltzmann's entropy formula.
Frequently asked questions
(32 - 32) × 5/9 + 273.15 = 273.15 K — the freezing point of water.
(212 - 32) × 5/9 + 273.15 = 100 + 273.15 = 373.15 K — the boiling point of water.
Absolute zero (0 K) corresponds to -273.15°C = -459.67°F.