Kelvin per watt to degrees Fahrenheit per watt
Type a value in K/W to get it in °F/W instantly.
3.6°F/W
That's 4× as insulating as a large finned heatsink, while a small clip-on heatsink is 2.5× higher. A 10 W part on it would sit about 20 °C above ambient.
Convert the other way: °F/W to K/W
What it means
How well does it get rid of heat?
Heatsink ratings assume free air. Forced airflow can halve the figure, and a poor thermal interface can add more resistance than the heatsink removes.
The math
How to convert K/W to °F/W
To convert kelvin per watt to degrees Fahrenheit per watt, multiply by 1.8.
Example: 2 K/W × 1.8 = 3.6 °F/W.
In the other direction, 1 °F/W = 0.555556 K/W.
Every unit
Your resistance in every unit
Tables
K/W to °F/W conversion table
| K/W | °F/W |
|---|---|
| 0.1 K/W | 0.18 °F/W |
| 0.25 K/W | 0.45 °F/W |
| 0.5 K/W | 0.9 °F/W |
| 1 K/W | 1.8 °F/W |
| 2 K/W | 3.6 °F/W |
| 5 K/W | 9 °F/W |
| 10 K/W | 18 °F/W |
| 20 K/W | 36 °F/W |
| 50 K/W | 90 °F/W |
| 100 K/W | 180 °F/W |
| 250 K/W | 450 °F/W |
°F/W to K/W conversion table
| °F/W | K/W |
|---|---|
| 0.1 °F/W | 0.0555556 K/W |
| 0.25 °F/W | 0.138889 K/W |
| 0.5 °F/W | 0.277778 K/W |
| 1 °F/W | 0.555556 K/W |
| 2 °F/W | 1.11111 K/W |
| 5 °F/W | 2.77778 K/W |
| 10 °F/W | 5.55556 K/W |
| 20 °F/W | 11.1111 K/W |
| 50 °F/W | 27.7778 K/W |
| 100 °F/W | 55.5556 K/W |
| 250 °F/W | 138.889 K/W |
Quick answers
Quick answers
- How many °F/W is 1 K/W?
- 1 K/W is 1.8 °F/W.
- How many °F/W is 10 K/W?
- 10 K/W is 18 °F/W.
- How many °F/W is 2 K/W?
- 2 K/W is 3.6 °F/W.
The units
About these units
Kelvin per watt (K/W)
The SI form, and the standard on heatsink datasheets.
Degrees Fahrenheit per watt (°F/W)
A US mixed unit found on some older datasheets.
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