Health & Medicine · Fitness · Performance Metrics
Standing Broad Jump Calculator
Calculate standing broad jump performance ratings, percentile estimates, and lower-body power output based on jump distance, body mass, and age.
Calculator
Formula
P_lower is estimated lower-body peak power (W), m is body mass (kg), g is gravitational acceleration (9.81 m/s^2), d is jump distance (m), h is estimated peak height of center of mass (~40% of horizontal distance based on typical takeoff angle of ~45 degrees), and t_air is estimated flight time derived from projectile motion. The Harman et al. formula is also applied: Peak Power (W) = 61.9 * jump_height_cm + 36 * body_mass_kg + 1822.
Source: Harman EA et al. (1991). Estimation of human power output from vertical jump. Journal of Applied Sport Science Research, 5(3), 116-120. FitnessGram/PACER Test norms (Cooper Institute, 2017).
How it works
The calculator accepts your jump distance (in centimetres), body mass (kg), age, and gender. It first converts the distance to metres and applies a projectile motion model to estimate flight time, assuming the athlete's centre of mass reaches approximately 40% of the horizontal distance as its peak height — consistent with a near-optimal 45° takeoff angle commonly observed in trained jumpers. Power is then estimated as P = (m × g × d) / t_air, where t_air is derived from the kinematic equation for free-fall.
Performance ratings are drawn from Cooper Institute FitnessGram normative tables and military fitness standards. The norms are stratified by age group and gender, producing five categories: Poor, Below Average, Average, Good, and Excellent. An estimated percentile rank (10th, 25th, 50th, 75th, or 90th) is assigned based on which normative band the jump falls within.
Coaches use standing broad jump scores to track explosive strength development across training cycles, identify athletes with elite power potential, and compare cohorts. The test is featured in the NFL Scouting Combine, US Army Combat Fitness Test, FitnessGram battery, and many national school fitness assessments worldwide.
Worked example
Example: 28-year-old male, 80 kg, jump distance 210 cm
Step 1 — Convert distance: d = 210 cm = 2.10 m
Step 2 — Estimate peak height: h ≈ 0.4 × 2.10 = 0.84 m
Step 3 — Estimate flight time: t_air = 2 × √(2 × 0.84 / 9.81) = 2 × √(0.1713) = 2 × 0.414 = 0.827 s
Step 4 — Estimate power: P = (80 × 9.81 × 2.10) / 0.827 = 1646.9 / 0.827 ≈ 1991 W
Step 5 — Norm lookup (male, age 20-29): Excellent ≥ 240 cm, Good ≥ 215 cm, Average ≥ 185 cm, Below Average ≥ 155 cm. A result of 210 cm falls in the Average band (~50th percentile).
This athlete generates nearly 2 kW of lower-body power and would benefit from plyometric programming to push into the Good tier (≥ 215 cm).
Limitations & notes
The power estimation assumes a projectile takeoff angle near 45° and a smooth parabolic trajectory, which may overestimate power for athletes who jump with a lower angle or significant forward lean. Body composition is not accounted for — two athletes at the same mass may have very different muscle-to-fat ratios. The normative tables are population averages and may not reflect elite sport-specific populations; an NFL lineman and a recreational gym-goer of the same age and gender are compared against the same reference, which may be misleading. Jump distance should be measured from the takeoff line to the nearest point of contact on landing (heel mark), following standard protocols — measurement error of even 2–3 cm can shift the category at borderline values. This calculator is informational and not a substitute for professional fitness assessment.
Frequently asked questions
What is the difference between the standing broad jump and the standing long jump?
They are the same test. 'Standing broad jump' is the traditional American term while 'standing long jump' is used internationally and by World Athletics. Both describe a maximal horizontal jump from a two-footed stationary stance, with distance measured from the takeoff line to the nearest landing mark.
What is a good standing broad jump distance for an adult male?
For men aged 20–29, a distance of 215 cm (7 ft 1 in) or more is generally considered 'Good', while 240 cm (7 ft 10 in) or more is 'Excellent' based on Cooper Institute norms. Elite athletes such as NFL combine participants often exceed 280 cm (9 ft 2 in). Average fit adult males typically jump around 185–215 cm.
How should I measure the standing broad jump correctly?
Stand with both feet behind and touching the takeoff line, toes pointing forward. Swing the arms and bend the knees before jumping, then push off with both feet simultaneously. Land with both feet and measure from the takeoff line to the closest point of contact (usually the heel of the rearmost foot). Take the best of three attempts. Wear non-slip athletic shoes on a non-slip surface for safety and consistency.
Why does the NFL Scouting Combine include the standing broad jump?
The NFL uses the standing broad jump as a proxy for explosive lower-body power, which correlates with acceleration off the line of scrimmage, change-of-direction ability, and overall athleticism. Research published in the Journal of Strength and Conditioning Research has shown significant correlations between broad jump distance and 40-yard dash times, making it a useful screening tool for all positions.
How accurate is the power estimate from a jump distance measurement?
The estimate is a reasonable approximation based on projectile motion physics but carries inherent error because it assumes a 45° takeoff angle and does not account for air resistance, individual centre-of-mass height, or actual foot-contact mechanics. Studies comparing this method to force plate data typically show agreement within 10–15%. For precise power measurement, a force plate or jump mat with contact-time measurement is recommended.
Can I use this calculator for children and adolescents?
Yes. The normative tables in this calculator include age groups starting from under 10 years old. Children's jumping ability improves substantially with age during development, so it is important to compare results against age-matched peers rather than adult norms. The FitnessGram program (Cooper Institute) provides validated child and adolescent norms used as the basis for the younger age brackets in this tool.
How can I improve my standing broad jump distance?
Training strategies with strong evidence include plyometric exercises (box jumps, depth jumps, broad jump repeats), heavy compound strength training (squats and deadlifts to build force production), hip flexor and calf flexibility work, and arm swing mechanics coaching. Studies show that combining strength and plyometric training yields greater improvements than either alone. Improvements of 10–20 cm over a 6–8 week focused program are achievable for beginners.
Last updated: 2025-01-30 · Formula verified against primary sources.