Cartwright Professional Assessment Tool

Vertical Jump Test Calculator

Compare squat jump height with published age- and sex-specific reference percentiles from ages 8–80. This calculator uses the squat jump protocol reported in the published reference dataset.

Evidence-based Ages 8–80 Age & sex percentiles Squat Jump protocol
Reference protocol: Squat Jump (SJ) These reference values are based on a squat jump performed after holding the squat position for 3 seconds, without a countermovement. Countermovement jump (CMJ) results should not be compared directly with these norms.
Published reference values cover ages 8–80.
Enter the best result from two correctly performed squat-jump trials.

Your Squat Jump Result

Protocol note: This comparison applies to the squat-jump protocol used in the reference study. Results from countermovement jumps, Vertec-style tests or other protocols may not be directly comparable.

How to perform the squat jump

  1. Complete an appropriate light warm-up.
  2. Stand on the measurement surface or device.
  3. Lower into a squat position.
  4. Hold the squat position for approximately 3 seconds.
  5. Do not perform a countermovement before take-off.
  6. Jump vertically as high as possible.
  7. Perform two trials.
  8. Record the highest valid jump height in centimetres.

For repeat testing, use the same equipment, technique and protocol wherever possible. Changes in measurement method can affect the recorded jump height.

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Measurement devices and protocols are not automatically interchangeable. The reference dataset used by this calculator was collected using a squat-jump protocol on a contact-mat system.

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Sayers jump-power calculator

Estimate peak power from squat jump-and-reach height and body mass. This separate calculation does not use the age and sex percentiles above.

The equation was developed in 108 college-age men and women. It uses jump-and-reach measurements: do not automatically substitute contact-mat or flight-time jump height. Predictions for children, older adults or different protocols are extrapolations.

Entry limits prevent common input errors; they are not validated population limits.

Equation, example and limitations

Peak power (W) = 60.7 × height (cm) + 45.3 × mass (kg) − 2055. Relative power (W/kg) = estimated watts ÷ body mass.

Example: 40 cm and 80 kg gives 3997 W and 49.96 W/kg. Non-positive predictions are withheld rather than reported as meaningful power.

The original study reported a standard error of estimate of 355 W; this is not an individual confidence interval. Use consistent equipment and technique for repeat testing. A small change in predicted watts does not establish a true change in measured power.

Sayers et al. (1999), Cross-validation of three jump power equations, Medicine & Science in Sports & Exercise, 31(4), 572–577.

Scientific methodology

Reference values are taken from published age- and sex-specific physical-fitness reference data reported by He and colleagues. The vertical-jump assessment used a squat-jump protocol rather than a countermovement jump.

Percentile interpretation uses the published P5, P25, P50, P75 and P95 values for the relevant age and sex group. The calculator does not invent exact percentiles between published values.

A result is therefore interpreted as a percentile band rather than as an unsupported exact percentile.

Reference

He et al. (2023). Published age- and sex-specific physical fitness reference values.
DOI: 10.1016/j.glt.2023.08.003

Important limitation: The reference population was Chinese and the results should be interpreted as reference values from that population, not universal human norms.