Power-to-Weight Ratio (W/kg)

Power-to-weight ratio (W/kg) is the key cycling performance metric. The same power with less weight dramatically improves climbing speed

The calculator uses the standard published formula for power to weight calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with kilograms, inches, watts. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: W/kg = FTP (Functional Threshold Power) / Body weight in kg. Each step in the calculation is shown so you can verify the result manually.