Vertical Jump Height Calculator

Work out vertical jump height instantly with clear inputs, formula shown and shareable results.

About Vertical Jump Height Calculator

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.

Formulas

Height from flight time

h = g t^2 / 8

Sayers peak power

P = 60.7 x height(cm) + 45.3 x mass(kg) - 2055

Worked example

With the default values below, Vertical Jump Height Calculator returns Vertical Jump Height of 37.1. Change any input above and every figure here is recalculated in your browser.

Inputs used

Flight time measuredminimum 0.01 s: 0.55 s
Body weightminimum 1 kg: 80 kg

Results

Vertical Jump Height: 37.1 cm
Estimated Peak Power: 3,820 W
Peak Power To Weight: 47.75 W/kg
Take-Off Velocity: 2.697 m/s

Step by step

1Values used
2Height from flight time
3Sayers peak power
4Vertical Jump Height= 37.1 cm
5Estimated Peak Power= 3,820 W
6Peak Power To Weight= 47.75 W/kg
7Take-Off Velocity= 2.697 m/s

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
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.
This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

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.

Frequently Asked Questions

Why divide by eight?

Because the rise takes half the flight time, and h = g(t/2)^2/2 simplifies to gt^2/8.

Is flight time or jump-and-reach better?

Flight time from a contact mat is more repeatable; jump-and-reach depends on arm extension technique and is easier to inflate.