Why Convert Degrees Fahrenheit to Kelvins?
Converting between degrees fahrenheit (°F) and kelvins (K) is one of the most common temperature conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert °F to K saves time and prevents errors.
Temperature conversion between °F and K is crucial for international travelers, medical professionals, and scientists. When traveling abroad, weather forecasts and thermostat settings use different scales — the US uses Fahrenheit while most countries use Celsius. Medical contexts are particularly critical: a body temperature of 37.0°C (98.6°F) is normal, but 38.0°C (100.4°F) indicates fever. In cooking, oven temperatures differ dramatically between recipes from different regions.
How to Convert Degrees Fahrenheit to Kelvins
To convert degrees fahrenheit to kelvins, use the following formula:
K = (°F − 32) × 5/9 + 273.15
Example: 1 °F = 255.9277778 K
For example, 5 °F = 258.15 K, 10 °F = 260.9277778 K, and 100 °F = 310.9277778 K. Our calculator above performs this conversion instantly with full precision — no rounding errors.
Common Use Cases
- Freezing point of water (273.15 K): 32 °F = 273.15 K
- Boiling point of water (373.15 K): 212 °F = 373.15 K
- Normal body temperature (310.15 K): 98.6 °F = 310.15 K
Common Mistakes to Avoid
- Linear assumption: Temperature conversion between °C and °F is NOT a simple multiplication — it involves both scaling and offset. Always use the full formula.
- Negative values: Below -40, Celsius and Fahrenheit values diverge significantly. -40°C = -40°F is the only point where they're equal.
- Body temperature precision: Normal body temperature is 37.0°C (98.6°F), but a fever starts at 37.5°C (99.5°F). The 0.5°C difference matters medically.
Pro Tips
- Memorize the factor: 1 °F = 255.9277778 K. For quick mental math, remember this base conversion.
- Quick reference: 5 °F = 258.15 K · 10 °F = 260.9277778 K · 25 °F = 269.2611111 K · 50 °F = 283.15 K · 100 °F = 310.9277778 K
- Bookmark this page: Save this converter for instant access. It works offline once loaded — no internet needed.
Degrees Fahrenheit to Kelvins Conversion Table
| °F | K |
|---|---|
| -40 °F | 233.15 K |
| -20 °F | 244.2611111 K |
| 0 °F | 255.3722222 K |
| 10 °F | 260.9277778 K |
| 20 °F | 266.4833333 K |
| 25 °F | 269.2611111 K |
| 30 °F | 272.0388889 K |
| 37 °F | 275.9277778 K |
| 40 °F | 277.5944444 K |
| 50 °F | 283.15 K |
| 60 °F | 288.7055556 K |
| 80 °F | 299.8166667 K |
| 100 °F | 310.9277778 K |
All values in this table are mathematically exact per NIST SP 811.