Enter your functional threshold power (kW) and weight (lbs) into the Cycling Power to Weight Ratio Calculator. The calculator will evaluate and display the Cycling Power to Weight Ratio. 

Cycling Power to Weight Ratio Formula

The following formula is used to calculate the Cycling Power to Weight Ratio. 

CPW = CP / W
  • Where CPW is the Cycling Power to Weight Ratio (kW/lb)
  • CP is functional threshold power (kW) 
  • W is your weight (lbs) 

To calculate the cycling power-to-weight ratio, divide the functional threshold power by the body weight.

How to Calculate Cycling Power to Weight Ratio?

The following example problems outline how to calculate Cycling Power to Weight Ratio.

Example Problem #1:

  1. First, determine the function threshold power (kW).
    • The function threshold power (kW) is given as: 100.
  2. Next, determine the your weight (lbs).
    • The your weight (lbs) is provided as: 150.
  3. Finally, calculate the Cycling Power to Weight Ratio using the equation above: 

CPW = CP / W

The values given above are inserted into the equation below and the solution is calculated:

CPW = 100 / 150 = .66 (kW/lb)


FAQ

What is Functional Threshold Power in cycling?

Functional Threshold Power (FTP) is the highest power a cyclist can maintain in a steady state for an hour without fatiguing. It’s a key metric used to guide training intensity and track fitness improvements over time.

Why is the Power-to-Weight Ratio important for cyclists?

The Power-to-Weight Ratio (PWR) is crucial because it determines a cyclist’s ability to perform, especially on climbs. A higher PWR means a cyclist can produce more power while maintaining a lower weight, making them faster, particularly on uphill gradients.

How can a cyclist improve their Power-to-Weight Ratio?

Improving the Power-to-Weight Ratio can be achieved by either increasing functional threshold power through structured training or reducing body weight while maintaining power output. Ideally, a combination of both strategies is used for optimal performance gains.