Drafting Power Savings Calculator

Drafting Power Savings — calculate it instantly for your rides, free.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

Riding in the pocket of air behind another rider substantially cuts the wind resistance you have to overcome, with the saving determined by how close you follow and the aerodynamic profile of the rider ahead — tight drafting can cut required power by roughly a third compared to riding alone at the same speed.

This physics shows up directly in team time trial rotation strategy, in motor-pacing behind a derny or motorcycle on the track, and in draft-legal triathlon racing, where staying legally within the draft zone is itself a tactical decision.

This calculator takes your speed, position and group size, and returns the watts you save and the speed advantage that comes with it.

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