Fahrenheit to Kelvin – convert °F to K
Convert Fahrenheit to Kelvin (°F to K) for physics, chemistry and engineering work where absolute temperature is required. This page opens the main temperature converter with °F → K pre-selected.
Open the interactive °F → K converter:
Use main converter (°F → K) or switch to K → °FYou can also switch to Celsius and Rankine on the homepage with one tap.
Quick reference: °F to K
The formula is K = (°F − 32) × 5/9 + 273.15. Some common Fahrenheit temperatures in Kelvin:
| Fahrenheit (°F) | Kelvin (K, approx.) |
|---|---|
| -459.67 °F | 0 K (absolute zero) |
| -40 °F | 233.15 K |
| 0 °F | 255.37 K |
| 32 °F | 273.15 K (freezing water) |
| 68 °F | 293.15 K (room temperature) |
| 98.6 °F | 310.15 K (body temperature) |
| 212 °F | 373.15 K (boiling water) |
Why convert Fahrenheit to Kelvin?
You might switch from °F to K when you:
- Use formulas in physics or chemistry that are defined in Kelvin.
- Convert experimental data logged in °F into an absolute scale.
- Work with gas laws, black-body radiation or reaction rates.
- Standardise mixed lab data from US and metric instruments.
Other temperature converters on this site
The main converter always converts through Kelvin internally, so absolute temperature relationships remain exact.
Last updated: 3 December 2025.