Convert Fahrenheit (°F) to Kelvin (K) instantly. Enter any value and get the result immediately.
°F → K Converter
| Fahrenheit (°F) | Kelvin (K) |
|---|---|
| 0.1 °F | 255.42777778 K |
| 0.5 °F | 255.65 K |
| 1 °F | 255.92777778 K |
| 2 °F | 256.48333333 K |
| 5 °F | 258.15 K |
| 10 °F | 260.92777778 K |
| 20 °F | 266.48333333 K |
| 50 °F | 283.15 K |
| 100 °F | 310.92777778 K |
| 200 °F | 366.48333333 K |
| 500 °F | 533.15 K |
| 1000 °F | 810.92777778 K |
| 5000 °F | 3033.15 K |
| 10000 °F | 5810.92777778 K |
The formula to convert Fahrenheit (°F) to Kelvin (K) is:
Step-by-step example — Convert 98.6°F to K:
Alternative method — via Celsius:
More examples:
Fahrenheit (°F) is a temperature scale developed by German physicist Daniel Gabriel Fahrenheit in 1724. It is primarily used in the United States for everyday temperatures. Water freezes at 32°F and boils at 212°F. Normal human body temperature is 98.6°F.
Kelvin (K) is the SI base unit of temperature and an absolute temperature scale — it starts at absolute zero (0 K), the coldest possible temperature in the universe. Named after British physicist Lord Kelvin, it uses the same degree size as Celsius. Kelvin does not use the degree symbol (°) — it is simply written as "K".
The key difference: Fahrenheit is a relative scale used for everyday life, while Kelvin is an absolute scale used in science, physics, and engineering worldwide.
| Fahrenheit (°F) | Kelvin (K) | Reference Point |
|---|---|---|
| -459.67 °F | 0 K | Absolute zero |
| -321.07 °F | 77.15 K | Liquid nitrogen |
| 0 °F | 255.37 K | Severe winter cold |
| 32 °F | 273.15 K | Freezing point of water |
| 68 °F | 293.15 K | Room temperature |
| 98.6 °F | 310.15 K | Normal body temperature |
| 100 °F | 310.93 K | Mild fever |
| 212 °F | 373.15 K | Boiling point of water |
| 350 °F | 449.82 K | Oven baking temperature |
| 1832 °F | 1273.15 K | Molten lava |
The formula is: K = (°F + 459.67) × 5/9. You can also convert via Celsius: first get °C = (°F − 32) × 5/9, then add 273.15.
32°F = 273.15 K. This is the freezing point of water. Formula: (32 + 459.67) × 5/9 = 273.15 K.
212°F = 373.15 K. This is the boiling point of water at sea level. Formula: (212 + 459.67) × 5/9 = 373.15 K.
98.6°F = 310.15 K. This is the normal human body temperature expressed in Kelvin.
Absolute zero is 0 K = -459.67°F. This is the theoretically coldest possible temperature — all molecular motion stops here.
Kelvin is an absolute scale starting at absolute zero, making it essential for scientific formulas. Fahrenheit is a relative scale useful for daily life but not suitable for thermodynamic calculations. For example, the Ideal Gas Law requires temperature in Kelvin.