Work out page speed conversion impact instantly with clear inputs, formula shown and shareable results.
Published studies consistently find each second of load time costs several percent of conversions, and this model applies a 7% relative uplift per second saved. The largest gains come from the first seconds removed, not the last.
Speed impact
Uplift = seconds saved × 7%; new rate = current rate × (1 + uplift)
Figures are estimates based on the inputs given. Marketing performance, platform fees and conversion behaviour vary by audience, channel and season. Use this as a planning guide, not a forecast.
It is a widely cited average. Your own before-and-after measurement is always the better evidence.
Reducing render-blocking assets, image weight and third-party scripts usually produce the biggest wins.