Vertical Jump Test Calculator
Calculate jump height, estimated power output, and a fitness score from your body weight, standing reach, jump reach, and selected gender.
Vertical Jump Power and Score Estimator
Vertical Jump Test Formula
Where:
- \(H\) — jump height (cm)
- \(JR\) — jump reach (cm)
- \(SR\) — standing reach (cm)
- \(P\) — estimated power output (W)
- \(W\) — body weight (kg)
Jump height is the difference between your highest jump reach and your standing reach. The calculator then uses body weight and jump height to produce a power estimate; it does not measure power directly.
Vertical Jump Test – Calculation Example
Example: A male weighing 70 kg has a standing reach of 220 cm and touches 280 cm during a jump.
\[H=280-220=60\text{ cm}\]
\[P=2.21(70)\sqrt{60}\approx1{,}198\text{ W}\]
Result: Jump Height is 60 cm, Power Output is 1,198 W, and Fitness Score is Excellent because the male Excellent category begins above 55 cm.
How to use the calculator
- Select Gender. This choice affects the Fitness Score thresholds, but not the jump-height or power calculations.
- Enter Body weight in kilograms. Use your weight at the time of the test.
- Measure Standing reach in centimeters: stand flat-footed and record the highest point you can reach with one hand.
- Measure Jump reach in centimeters: jump vertically and record the highest point touched with the same hand. Enter a value greater than your standing reach.
- Read the three results: Jump Height, Power Output, and Fitness Score.
What the vertical jump test tells you
A vertical jump test measures how high you rise from a standing position. Comparing jump reach with standing reach removes the effect of your height and arm length from the reach measurement. The resulting jump height is a practical indicator of jumping performance and is often used to track changes during strength or plyometric training.
Power Output is an estimate calculated as \(2.21W\sqrt{H}\), using kilograms and centimeters. A higher jump or greater body weight raises this estimate. It is not a direct measurement of mechanical power, and the formula is not the Sayers equation. When comparing your own tests, look at jump height as well as estimated power: a change in body weight can change the power result even if your jump stays the same.
Fitness Score is a simple label based only on jump height and the selected Gender. It does not adjust for age, sport, training background, or body weight. Treat it as a quick classification within this calculator, not a diagnosis or a comprehensive measure of fitness. Other tests assess different abilities: grip strength focuses on hand strength, while the Cooper Test assesses aerobic performance.
Fitness Score thresholds
| Gender selected | Poor | Average | Excellent |
|---|---|---|---|
| Male | Below 30 cm | 30–55 cm | Above 55 cm |
| Female | Below 20 cm | 20–45 cm | Above 45 cm |
The boundary values belong to Average: for example, 55 cm is Average with Male selected, while a result above 55 cm is Excellent. These broad categories are built into the calculator; they are not age-specific or sport-specific norms.
Measurement tips and limitations
Use the same method for both reach measurements. A marked wall or a vertical-jump measuring device can help you record the highest touch. Reach with the same arm, keep your feet flat for standing reach, and avoid standing on your toes. For jump reach, decide whether you are testing a jump from a standstill or allowing a run-up; those are different tests and should not be mixed when tracking progress.
Take several jumps with appropriate rest and record the best valid attempt, noting your method for next time. Warm up first and use a safe, non-slip surface. Footwear, arm swing, fatigue, and measurement precision can all affect the result. The calculator requires a positive body weight and reach values, with Jump reach greater than Standing reach; otherwise, it reports an invalid input.
Use repeated results to spot trends rather than treating a small difference as definite progress. If you want to compare an estimated power figure with body weight on a separate basis, see the Power-to-Weight Ratio Calculator, bearing in mind that any ratio based on this jump estimate remains an estimate.
Frequently Asked Questions
How do I calculate my vertical jump in inches by hand?
Subtract your standing reach from your jump reach, using inches for both measurements. For example, a 108-inch jump reach and an 88-inch standing reach give a 20-inch vertical jump. To enter that result in a calculator that uses centimeters, multiply by 2.54: 20 inches is 50.8 cm. Convert body weight from pounds to kilograms by dividing by 2.20462.
Can I calculate vertical jump height from hang time instead?
Yes, but it is a different measurement method. If you know your total time airborne in seconds, estimate height in meters with \(h=9.81t^2/8\), where \(t\) is hang time. This assumes takeoff and landing occur at the same height. Bending your knees or changing foot position on landing can distort the estimate, so do not treat it as directly interchangeable with a reach test.
What is a good vertical jump for my age or sport?
A good result depends on age, sport, training level, and the testing method. The calculator’s broad score bands are not age- or sport-specific norms. For a useful comparison, look for published results from people tested under similar conditions, such as standing jumps with or without an arm swing. Your own consistently measured results are usually more useful for tracking progress.
Does using an arm swing or a run-up change my vertical jump result?
Yes. An arm swing can help generate upward momentum, while a run-up adds an approach that changes the task substantially. A jump from a still position, a countermovement jump with an arm swing, and an approach jump should be recorded as separate results. For fair comparisons over time, use the same takeoff, arm movement, footwear, and measurement method each session.
Is the estimated power in watts the same as force-plate peak power?
No. The watt figure is produced by an equation based on body weight and jump height; it is not a measurement of force or velocity during takeoff. A force plate can calculate power from measured movement data, and its peak-power value may differ considerably. Compare watt figures only when they were calculated using the same formula and testing method.
How much vertical jump improvement is meaningful?
There is no universal minimum change that proves improvement. Small differences can result from touch accuracy, fatigue, warm-up, or normal day-to-day variation. Take several valid attempts per session, keep the best result, and repeat the same test on multiple days. A higher result that persists across sessions is more convincing than a single unusually high jump.
Will losing weight improve my vertical jump?
Not necessarily. Jump height depends on how much upward force you can produce relative to your body weight, along with technique and other factors. Weight loss could help, have no effect, or reduce performance if it also reduces strength or recovery. This calculator’s estimated watts will decrease with lower body weight if jump height stays unchanged, even though the jump itself is equally high.