Drafting & Aero Savings Calculator

Estimate the power saved by drafting or a paceline and convert it into time saved over a flat course

Frequently Asked Questions

How much energy does drafting save?

Sitting on a single wheel reduces drag ≈25–30% (often 27%). A 4-rider rotating paceline averages ≈35–40% savings for the group; sitting in a 6+ rider bunch can save 45–55% on the wheels at the back.

How much time does that save?

On a 40 km flat ride at 200 W solo (≈35 km/h), 27% drag savings at the same power lifts speed ≈8–10% to ≈38 km/h, cutting time from 68 min to ≈63 min - a 5-min gap that grows on longer rides.

How does gap distance affect drafting?

A 0.5 m wheel-to-wheel gap captures most of the benefit. At 1.5 m draft drops to ≈15%, at 3 m to ≈8%. Drafting a car or truck at 5–10 m can save 60–80% but is dangerous and illegal in most events.

Does drafting work on climbs too?

Less so. Above ≈6% gradient and below ≈18 km/h, aero drag is a small share of total resistance, and drafting saves under 5%. Weight and W/kg dominate; drafting matters most on flats and rolling terrain.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.