Work out vertical jump height instantly with clear inputs, formula shown and shareable results.
Flight time gives jump height directly from projectile motion: h = g t^2/8, because half the flight is spent rising. A 0.55 second flight is a 37.1 cm jump with a take-off velocity of 2.70 m/s. The Sayers equation then estimates peak power from height and body mass, which is the standard field measure of lower-body explosiveness.
Height from flight time
h = g t^2 / 8
Sayers peak power
P = 60.7 x height(cm) + 45.3 x mass(kg) - 2055
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 the rise takes half the flight time, and h = g(t/2)^2/2 simplifies to gt^2/8.
Flight time from a contact mat is more repeatable; jump-and-reach depends on arm extension technique and is easier to inflate.