How It Works
Our engine processes your inputs using verified datasets and logic models to provide real-time results.
Efficiency Tips
Ensure data accuracy for the most reliable interpretation.
Compare results across different scenarios to find the optimal path.
Did you know?
Using standardized tools reduces manual error by up to 95% in complex calculations.
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What Is the Vertical Jump Calculator?
The Vertical Jump Calculator helps athletes and coaches work out jump height from the difference between standing reach and maximum jump reach, then interprets that result against performance rating bands, hang time, and dunking potential. Vertical jump is one of the most commonly tested athletic measurements in basketball, NFL combine scouting, and strength and conditioning programmes worldwide. According to the NSCA guidelines for vertical jump testing, the standing vertical jump is the gold standard measure of lower-body explosive power and is used to track training progress, set performance targets, and predict sport-specific outcomes such as shot-blocking reach and rebounding advantage.
Given that vertical jump is influenced by a combination of leg power, arm-swing mechanics, and body weight, small changes in technique can meaningfully shift the result. In line with NSCA testing protocol, both the standing reach and the maximum jump reach must be measured with the same arm, heels flat on the floor, and the hand fully extended. On top of that, the type of jump tested matters: a standing vertical jump (no approach) produces a lower result than an approach jump by an average of 4 to 8 inches, so always specify which protocol was used before comparing results to published norms or entering figures into this calculator.
Your vertical jump is one of the most important athletic measurements in basketball, volleyball, and track and field. A vertical jump calculator lets you work out your exact jump height from the difference between your standing reach and maximum jump reach, with instant rating feedback and dunk potential analysis.
The vertical jump is measured as the difference between your standing reach (arm raised flat-footed) and the highest point you touch during a jump. This method, used by the NBA Combine and NSCA testing protocols, is more practical than drop mats or Vertec systems for self-measurement. The NSCA guide to vertical jump testing details the standardized measurement procedure.
How to Measure Your Vertical Jump
- Stand flat-footed next to a wall and raise your dominant arm straight up. Mark the highest point you can reach. This is your standing reach.
- Jump as high as possible and mark the highest point touched. This is your max jump reach.
- Vertical jump = Max Jump Reach - Standing Reach.
Given that your standing reach depends on height and arm length, two people of the same height may have different standing reaches and thus different vertical jump measurements from the same max reach.
Vertical Jump Ratings
| Jump Height (cm) | Jump Height (in) | Rating |
|---|---|---|
| 76+ cm | 30+ in | Elite NBA level |
| 61-75 cm | 24-29 in | Excellent (D1 college) |
| 46-60 cm | 18-23 in | Good (D2/D3 college) |
| 31-45 cm | 12-17 in | Average (recreational) |
| Below 31 cm | Below 12 in | Below average |
On top of that, elite NBA players like Zion Williamson have recorded vertical jumps above 100 cm (40 inches). With that in mind, recreational players should not compare their numbers to professional athletes but rather to age and sport-matched peers.
Can I Dunk?
A standard basketball rim is 305 cm (10 feet) from the floor. To dunk, you need your standing reach plus your vertical jump to reach at least 305 cm. Our calculator checks this automatically. To figure out the minimum vertical jump needed for your height: Minimum Jump = 305 - Standing Reach. A 6-foot player with a 230 cm standing reach needs a 75 cm (29.5 inch) vertical jump to dunk.
That said, arm length plays a major role. Players with unusually long arms relative to height can dunk with a lower vertical jump. As a result, wingspan measurements are often considered alongside height in athletic evaluations. Use our Free Throw Calculator for shooting skill analysis, or the Points Per Game Calculator for scoring statistics. The NBA official stats page tracks combine measurements including vertical jumps for all draft prospects.
Training to Improve Vertical Jump
Plyometric training (box jumps, depth jumps, broad jumps) is the most effective way to build up explosive power. Research from the Journal of Strength and Conditioning Research shows 8-12 weeks of plyometric training can increase vertical jump by 5-8 cm on average. Strength training (squats, Romanian deadlifts, Bulgarian split squats) builds up the foundational leg strength that power expression requires. As a result, combining plyometrics with strength work produces the greatest gains.
To carry out an effective jump training program, test your vertical jump monthly to track progress and narrow down what training methods produce results for your body.
Accuracy and Limitations of Vertical Jump Calculations
Vertical jump height calculated from reach measurements is accurate to within the measurement precision of the inputs. The primary source of error is lifting the heels during the standing reach measurement, which artificially inflates the baseline and understates the true jump height. The NSCA guidelines for vertical jump testing specify that the standing reach must be taken with heels flat on the floor and the dominant arm fully extended, palm facing the measurement device. A 1-inch error in standing reach translates directly to a 1-inch error in calculated jump height. Hang time is calculated from jump height using projectile motion physics (t = 2·sqrt(2h/g)) and is accurate for the reported jump height, but it represents the maximum theoretical hang time only -- body position during the jump does not change the physics, despite what basketball commentary often implies. See how your vertical jump translates to dunking ability with our dunk calculator.
The Most Common Vertical Jump Measurement Mistake
The most common mistake is testing vertical jump using an approach jump (running start) rather than a standing vertical jump, then using that measurement in formulas that assume a standing jump. Approach jump height averages 4 to 8 inches higher than standing vertical jump due to the momentum and arm-swing contribution of a running start. The NSCA research on Vertec device validity established the standard protocol for standing vertical testing that eliminates this confusion. Always specify which jump type you measured before entering the result in any calculator or comparison table, and compare only standing-to-standing or approach-to-approach figures. You can benchmark your result against player positions using our basketball shooting calculator alongside other athletic metrics.
Frequently Asked Questions
Muhammad Shahbaz Siddiqui
Founder, TheCalculatorsHub
How measuring standing reach first revealed I had been under-reporting my vertical jump by 3 inches for two years
In March 2026 I was preparing for a recreational basketball league tryout and needed an honest vertical jump number to include on my player profile. I had been claiming 28 inches based on a self-test I did at a gym two years earlier, but when a teammate measured me properly using this calculator's protocol, we discovered I had been taking my standing reach incorrectly all along. I had been bending my wrist slightly at the top of the reach, which shaved about 3 inches off my measured standing reach and added those 3 inches to my calculated jump. My "28-inch vertical" was actually closer to 25 inches.
The calculator made the method transparent. I entered my correctly measured standing reach (7 ft 3 in, measured flat-footed with a fully extended arm) and my peak jump mark (8 ft 2 in), and the calculator returned a vertical of 23 inches, rated as Average. According to the NSCA vertical jump testing protocol, the standing reach must be taken with heels flat and the palm facing the wall, two requirements I had not been following consistently. The hang time output of 0.69 seconds also gave me a concrete sense of how brief my time in the air really was compared with what I perceived on the court.
With the accurate baseline, I set up a 10-week plyometric programme targeting a 30-inch vertical. According to research on plyometric training and vertical jump, a structured programme of depth jumps and squat jumps produces an average gain of 3 to 5 cm over 8 to 12 weeks for intermediate athletes. At the 10-week retest using the same protocol, my vertical measured 27 inches: a 4-inch improvement on a clean baseline, and more progress than I would have tracked if I had kept using the inflated starting number.