Vertical Jump Calculator
Created by: Ethan Brooks
Last updated:
Calculate your vertical jump height, peak power output using the Lewis formula, fitness category, and percentile for your gender. Compare to NBA combine, volleyball, and other sport benchmarks.
Vertical Jump Calculator
UtilityApplicationWhat is a Vertical Jump Calculator?
A vertical jump calculator converts your standing reach and jump reach measurements into a jump height in inches and centimeters, estimates peak mechanical power output using validated athletic formulas, and places your result in a fitness category compared to age-group and gender norms. The measurement is simple: the difference between your maximum standing reach and your peak jump reach. What the calculator adds is context — whether 22 inches is average, good, or elite for your demographic, and what power output that height represents.
Vertical jump is one of the most widely used field tests in sports science and athletic scouting because it correlates strongly with sprint speed, leg power, and reactive strength. The NFL Scouting Combine, NBA Draft Combine, and NCAA testing protocols all include vertical jump as a standard assessment. A 28-inch vertical average at the NBA combine reflects elite lower-body explosiveness, while NFL linebackers average 30-35 inches. Understanding your number relative to these benchmarks helps set realistic development targets.
Beyond sport-specific comparison, the peak power calculation provides a biomechanically meaningful output. The Lewis formula (Power = √4.9 × mass_kg × √jump_height_m × 9.81) and the more precise Sayers formula both estimate the mechanical work performed during the jump, expressed in watts. Heavier athletes who jump the same height as lighter athletes actually produce more power — the power metric normalizes for body mass in a way raw jump height cannot.
Vertical jump training through plyometrics (depth jumps, box jumps, bounding) and strength training (squats, deadlifts) realistically adds 4-8 inches over a 12-week dedicated program. Tracking progress with this calculator every 4 weeks provides objective confirmation that training adaptations are occurring and informs whether to prioritize strength, power, or reactive strength phases.
How Vertical Jump Power Is Calculated
Jump height is the raw difference between measurements. Power estimates require body mass and jump height together.
Jump height = jump_reach − standing_reach
Lewis formula: Peak Power (W) = √(4.9 × mass_kg) × √(height_m) × 9.81
Sayers formula: PP (W) = (60.7 × height_cm) + (45.3 × mass_kg) − 2055
Relative power = Peak Power ÷ body_mass_kg (W/kg)
Countermovement jumps (with dip) produce 10-15% more height than squat jumps (static start) due to elastic energy storage in the Achilles tendon and quadriceps. All standard testing protocols specify countermovement unless stated otherwise.
Example Calculations
Common Applications
- Screening athletic potential during sports tryouts or recruiting by comparing jump height to position-specific benchmarks.
- Tracking plyometric training progress over 4-8 week blocks to confirm explosiveness improvements are occurring.
- Identifying muscle imbalances — single-leg jump testing reveals side-to-side differences that predict injury risk.
- Monitoring post-injury return-to-sport readiness by comparing bilateral jump symmetry and power output to pre-injury baseline.
- Setting realistic jump height targets for sport selection — volleyball requires excellent female vertical jumps (24+ in) at competitive levels.
- Motivating younger athletes with objective benchmarks tied to sport-specific positions and recruiting standards.
- Comparing power development between strength training and plyometric training phases to optimize program design.
Tips for Vertical Jump Testing and Training
- Always test on the same surface (hardwood or track) — carpet and grass absorb energy and underestimate true jump height.
- Take 3-5 attempts with full rest between each and record your best result for an accurate baseline.
- Warm up 10-15 minutes with dynamic stretching and 3-5 submaximal jumps before testing.
- Program plyometrics 2-3x per week with at least 48 hours between sessions to allow neuromuscular recovery.
- Pair jump training with heavy squats (80%+ 1RM) — complex training (strength + plyometric in same session) produces superior power gains.
Frequently Asked Questions
What is a good vertical jump for a male?
For adult males, a vertical jump of 16-22 inches is considered average, 23-28 inches is good, and 29-36 inches is excellent. Elite athletes in sports like basketball and volleyball commonly jump 28-35+ inches. NBA draft combine average is around 28 inches with countermovement. College-level basketball players typically jump 24-32 inches. Training can realistically add 4-8 inches over 3-6 months of dedicated plyometric work.
How do I measure my vertical jump accurately?
Stand flat-footed next to a wall and reach as high as possible with your dominant hand — mark that height (standing reach). Then jump and touch the wall at your highest point — mark that height (jump reach). Vertical jump = jump reach minus standing reach. For repeatability, take 3 attempts and record the best. If using a Vertec device or jump mat, follow the manufacturer calibration protocol. Remove shoes for the most accurate baseline measurement.
What is the difference between countermovement and squat jump?
A countermovement jump (CMJ) starts from standing, dips quickly, and explodes upward — this uses the stretch-shortening cycle to store elastic energy in tendons, adding 10-15% height over a pure squat jump. A squat jump begins from a static squat position, eliminating the elastic contribution. CMJ is more sport-specific and commonly tested. Squat jump better isolates pure concentric power. NBA combine and most athletic tests use countermovement jumps.
Can you increase vertical jump without weights?
Yes. Plyometric training — depth jumps, box jumps, bounding, ankle stiffness drills — effectively increases vertical jump through neural adaptations and improved reactive strength without heavy weights. Athletes gain 2-4 inches in 6-8 weeks from plyometrics alone. Adding strength work (squats, deadlifts, Bulgarian split squats) amplifies the gains. Research shows combined plyometric and strength training improves vertical 5-8 inches over 12 weeks for recreational athletes.
How does the Lewis formula calculate peak power from vertical jump?
The Lewis formula estimates peak mechanical power from jump height and body mass: Peak Power (Watts) = √(4.9 × mass_kg) × √(jump_height_m) × 9.81. It provides a reasonable power estimate from a simple jump test without lab equipment. The Sayers formula is more accurate for athletes: PP = (60.7 × jump_cm) + (45.3 × mass_kg) − 2055. Both formulas correlate well with force plate measurements in field settings.
What sports benefit most from vertical jump training?
Basketball, volleyball, American football (wide receivers, defensive backs, linebackers), track and field (high jump, long jump), gymnastics, and soccer all see direct performance benefits from higher vertical jump. In basketball, each additional inch of vertical allows better shot-blocking reach and rebounding positioning. In volleyball, it directly increases attack height and blocking coverage. Even endurance sports benefit indirectly through improved running economy from greater leg spring stiffness.
How accurate is the vertical jump as a measure of athletic ability?
Vertical jump correlates strongly with sprint speed, agility, and explosive power, making it a reliable proxy for overall lower-body power output. NFL and NBA scouts use it as a key screening metric. However, it captures only one dimension of athletic ability — reactive strength at a single joint configuration. It does not reflect lateral agility, endurance, or technical skills. Use it as one of several metrics in a comprehensive athletic assessment battery.
Sources and References
- Johnson, D. L. & Bahamonde, R., "Power Output Estimate in University Athletes," Journal of Strength and Conditioning Research, vol. 10, 1996.
- Sayers, S. P. et al., "Cross-Validation of Three Jump Power Equations," Medicine & Science in Sports & Exercise, vol. 31, 1999.
- NSCA, "Essentials of Strength Training and Conditioning," 4th ed., Human Kinetics, 2022.
- NBA Draft Combine, Vertical Jump Measurement Standards, NBA.com, 2024.