Work out sprint speed (40 yard) instantly with clear inputs, formula shown and shareable results.
Forty yards is 36.576 m, so a 4.80 second dash averages 7.62 m/s or 27.4 km/h. Splitting out the first ten yards separates acceleration from top-end speed: at 1.65 s the opening ten averages 5.54 m/s while the remaining thirty averages 8.71 m/s, showing how much of the run is spent still accelerating.
Average speed
v = 36.576 m / time
Flying speed
v = 27.432 m / (total time - 10 yard split)
This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.
Because most sports need acceleration over short distances far more than top speed, and the split isolates that quality.
Around 4.4-4.5 s is elite for a professional footballer, 4.8-5.0 s is a good club athlete, and above 5.5 s suggests limited sprint training.