Fahrenheit to Kelvin Converter
32 °F = 273.15 K (water freezing). Absolute zero = 0 K = −459.67 °F. Body temperature = 310.15 K.
Inverse conversion
273.15 K = 32 °F (water freezes). Absolute zero = 0 K = −459.67 °F. Normal body temp = 310.15 K.
Formula
Formula
K = (°F − 32) × 5/9 + 273.15
Worked example
To convert 98.6°F (body temperature) to Kelvin: (98.6 − 32) × 5/9 + 273.15 = 66.6 × 0.5556 + 273.15 = 37.0 + 273.15 = 310.15 K.
Quick reference table
| °F | K |
|---|---|
| -459.67 | -5.684342e-14 |
| -40 | 233.15 |
| 0 | 255.372222 |
| 32 | 273.15 |
| 72 | 295.372222 |
| 98.6 | 310.15 |
| 212 | 373.15 |
| 1832 | 1273.15 |
Unit definitions
Fahrenheit (°F)
Fahrenheit (°F) is an imperial temperature scale. Water freezes at 32°F and boils at 212°F at standard pressure.
Kelvin (K)
Kelvin (K) is the SI absolute scale. 0 K = absolute zero = −459.67°F. Used in all scientific contexts.
Common use cases
- Converting US temperature data to absolute Kelvin for scientific analysis
- Gas laws: using US oven temps in PV=nRT calculations
- Thermodynamics: US engineering data in SI equations