How to Convert Fahrenheit to Kelvin
Converting Fahrenheit to Kelvin is essential in scientific and engineering applications. Kelvin is the SI unit of temperature and is used in physics and chemistry.
20.0 °F = 266.48 K
To convert Fahrenheit to Kelvin, first convert to Celsius, then add 273.15.
Step-by-Step
- Start with your value: 20.0 °F
- Subtract 32
- Multiply by 5/9 (to get Celsius)
- Add 273.15 (to get Kelvin)
- Result: 266.48 K
Formula: K = (°F - 32) × 5/9 + 273.15
💡 Memory Tip: 32°F = 273.15 K (freezing). 212°F = 373.15 K (boiling). Body temp 98.6°F = 310.15 K.
Fahrenheit to Kelvin Quick Reference
| °F | Kelvin | Common Reference |
|---|---|---|
| -459.67 | 0 | Absolute zero |
| 32 | 273.15 | Water freezing |
| 68 | 293.15 | Room temperature |
| 98.6 | 310.15 | Body temperature |
| 212 | 373.15 | Water boiling |
What does 20 fahrenheit look like in real life?
Real-world objects and measurements that are approximately 20 degree fahrenheit (266.48 kelvin) — useful for visualizing the size of 20 degree fahrenheit without a ruler:
- a cool spring day
- a cool room (~65°F)
Understanding Fahrenheit and Kelvin
What is a Degree Fahrenheit?
The degree Fahrenheit (°F) is a unit of temperature on the Fahrenheit scale, primarily used in the United States. Water freezes at 32°F and boils at 212°F at standard atmospheric pressure.
Learn more about fahrenheit on Wikipedia →
What is a Kelvin?
The Kelvin (K) is the base unit of temperature in the International System of Units (SI), defined as 1/273.16 of the thermodynamic temperature of the triple point of water. Unlike Celsius and Fahrenheit, the Kelvin scale has no negative values.
Learn more about kelvin on Wikipedia →
Common Uses of Fahrenheit
Weather reports in the US, Cooking and baking (ovens, stovetop), Body temperature (medical, US), Home thermostats in the US.
Key Conversion Points
- 0 K = -459.67°F (absolute zero)
- 273.15 K = 32°F (freezing)
- 293.15 K = 68°F (room temp)
- 310.15 K = 98.6°F (body temp)
- 373.15 K = 212°F (boiling)
✅ Free to use ✅ No registration required ✅ Accurate to 2 decimal places
Frequently Asked Questions
20 °F equals 266.48 K. Formula: (°F - 32) × 5/9 + 273.15
K = (°F - 32) × 5/9 + 273.15
For 20°F: (20 - 32) × 0.556 + 273.15 = 266.48 K
20 °F = -6.67 °C
Absolute zero = 0 K = -459.67°F. This is the coldest possible temperature.
No, Kelvin cannot be negative. 0 K is absolute zero - the minimum possible temperature.
