This calculator will calculate your watts per kilogram(kg). It takes your weight in pounds. You also need to specify the watts. This can be your FTP, your 15s, 1min or 20min watts. It outputs your weight in kg and watts per kg.
if you are racing in Zwift you need choose a race category. These categories are based on your functional treshold power (in watts) per kg ranges. Here are the Zwift categories.
| Category | Watts / kg |
|---|---|
| A | 4.0 and above |
| B | 3.2 - 3.9 |
| C | 2.5 - 3.1 |
| D | 2.4 and below |