Vertical Jump Calculator

The vertical jump is one of the most widely used and universally recognized tests of lower-body explosive power in sports science, athletic recruitment, and performance assessment. From the NBA Draft Combine and NFL Scouting Combine to collegiate athletics tryouts and military fitness evaluations, the vertical jump test provides a simple yet highly informative measure of an athlete's ability to generate maximal force rapidly against gravity. This single metric has been shown to correlate strongly with sprint speed, agility, and overall athletic performance across virtually every sport that demands explosive movement.

This Vertical Jump Calculator computes your jump height from the difference between your standing reach and your maximum jump reach, then uses the Sayers peak power equation to estimate your lower-body power output in watts. The Sayers equation, published in 1999 and validated against force plate measurements, is one of the most accurate field-based power prediction formulas available. It uses only vertical jump height and body mass as inputs, making it practical for use in any gym or training facility without expensive laboratory equipment.

The peak power output derived from the Sayers equation represents the maximum instantaneous power generated during the concentric (upward) phase of the jump. This measurement is critical because power, defined as the rate of force production (force multiplied by velocity), is the physical quality that most directly determines explosive athletic performance. An athlete who can produce more power relative to their body weight will jump higher, sprint faster, and change direction more quickly than a less powerful athlete of the same size.

Understanding the distinction between absolute power (total watts) and relative power (watts per kilogram of body weight) is essential for meaningful performance assessment. A 120 kg football lineman may produce more absolute power than a 70 kg basketball guard, but the lighter athlete is likely to have superior relative power, which is the more relevant metric for most athletic tasks that involve moving one's own body. Relative power values above 50 W/kg are characteristic of elite-level jumpers, while values in the 30-40 W/kg range are typical of well-trained recreational athletes.

Vertical jump norms vary by sport, gender, and competitive level. In men's basketball, NBA-caliber athletes typically demonstrate vertical jumps of 71-91 cm (28-36 inches), with exceptional athletes exceeding 102 cm (40 inches). In women's volleyball, elite players commonly achieve 51-66 cm (20-26 inches). For the general male population, a vertical jump of 41-51 cm (16-20 inches) is considered average, while 61 cm (24 inches) or more indicates above-average explosiveness.

The vertical jump test is remarkably sensitive to training adaptations, making it an excellent tool for monitoring the effectiveness of plyometric training, Olympic weightlifting, and periodized strength programs. Research consistently shows that properly designed training programs can improve vertical jump height by 5-15% over 8-12 weeks, with the greatest gains occurring in athletes with less training experience. Tracking your vertical jump and calculated power output over time provides objective evidence of whether your training is successfully developing the explosive qualities needed for athletic performance.

For accurate testing, the vertical jump should be measured using a reach-and-jump protocol (Vertec or wall-mounted measurement device) or a contact mat/force plate system. The athlete stands flat-footed, reaches as high as possible to establish standing reach, then performs a maximum-effort countermovement jump (with arm swing) to touch the highest possible point. The difference between the two measurements is the vertical jump height. At least three attempts should be made, with the best attempt recorded as the official score.

This calculator also converts your vertical jump from centimeters to inches, as both units are commonly used in athletic performance reporting. The Sayers power equation has been shown to predict actual force-plate measured peak power with less than 3% error in most populations, making it a reliable and accessible alternative to laboratory-based power testing.