跳跃高度计算器 — 公式

How Vertical Jump Is Measured

Vertical jump is the difference between how high you can reach standing flat-footed and how high you can touch at the peak of a jump. Stand next to a wall, reach up, mark the spot. Then jump and slap the wall at your highest point. The gap between those two marks is your vertical.

Formula

Vertical Jump = Jump Reach - Standing Reach

Hang Time = 2 x sqrt(2 x Height(m) / 9.81)

Hang time is calculated from freefall physics. A 24-inch vertical gives about 0.70 seconds of air time. A 36-inch vertical gives 0.86 seconds. The visual difference is dramatic, but the actual time difference is small.

When to Use This

Athletes testing for basketball, volleyball, football, or track and field. Coaches use vertical jump as a proxy for lower-body explosiveness. The NBA combine, NFL combine, and college athletic testing all measure standing and running verticals.

How to Read Your Result

RatingMenWomen Below averageUnder 16 inUnder 10 in Average16-20 in10-14 in Good20-24 in14-18 in Very good24-28 in18-22 in Excellent28-32 in22-26 in Elite32+ in26+ in

For context, the NBA combine average is 28-35 inches for a standing vertical. Running verticals are typically 4-8 inches higher because of the added momentum.

What Affects Your Score

Fast-twitch muscle fiber ratio, relative leg strength (especially glutes and quads), and technique all play a role. Heavier athletes tend to have lower verticals in absolute terms, but pound-for-pound the numbers tell a different story. Training programs that combine heavy squats with plyometrics (box jumps, depth jumps) typically produce 2-6 inches of improvement over 6-12 weeks.

Common Mistakes

Measuring against a wall without chalk or a Vertec device. Guessing where you touched gives inaccurate results.

Comparing standing vertical to approach vertical. They test different things. Always specify which you measured.

Testing after a workout. Fatigued muscles underperform. Test when fresh for a true baseline.