Power-to-Weight Ratio Calculator

About this calculator

This calculator divides output power by total weight to give the power-to-weight ratio — a single number that says how much thrust or acceleration is available for each kilogram being moved, usually expressed in watts or horsepower per kilogram.

It is the number racers actually care about: cyclists compare watts per kilogram to gauge climbing ability, motorsport engineers use hp/kg to compare cars regardless of size, and aircraft designers use it to judge climb performance. A lighter vehicle or rider with the same power always wins on power-to-weight.