Vertical Jump Calculator
Vertical jump height from a reach test, or from how long you were in the air.
The reach method subtracts your standing reach from the highest point you touch.
How the vertical jump calculator works
The reach method subtracts your standing reach from the highest point you touch. The hang-time method uses gravity: a body in free flight rises and falls in equal halves, so height equals g × t² ÷ 8 — 0.6 seconds of air time is a 44 cm jump. Both are shown in centimetres and inches.
Formula: reach: jump = touch height − standing reach; hang time: h = g·t² ÷ 8
Worked examples
| Inputs | Vertical jump | Note |
|---|---|---|
| Touch 285 cm from a 230 cm reach | 55 | 55.0 cm |
| 0.6 s hang time | 44.1 | 44.1 cm |
| Inches: 112 from a 90 reach | 22 | 22.0 in |
FAQFrequently asked questions
How high is a good vertical jump?
For adult men, 50 cm (20 in) is good and 70 cm or more excellent; for women, 40 cm is good and 55 cm or more excellent. NBA combine leaders reach about 100 cm from a running start.
Why does hang time give a different number from the reach test?
The reach test measures how high your fingertips go, which includes arm swing and reach; hang time measures the rise of your centre of mass. Hang-time figures are usually a little lower.
How do I measure hang time?
With a jump mat, or a slow-motion phone video — count frames from take-off to landing and divide by the frame rate. Tucking your knees in the air inflates the number, so land with legs as straight as you took off.
Where does g·t²/8 come from?
A body in free flight rises for half the hang time, and the distance fallen in time t/2 under gravity is ½ × g × (t/2)², which simplifies to g·t²/8.
Where these figures come from
- World Handicap System — Rules of Handicapping — the score differential and handicap index formula
- International Cricket Council — Playing Conditions — over structure and run-rate definitions
- England and Wales Cricket Board — the national body for the sport these statistics most often describe here
Last checked: September 2026. Formulas follow the governing bodies where one publishes them — the World Handicap System for golf, the ICC playing conditions for cricket run rates.