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Dunk Calculator — 131.4" Threshold

Standing reach + vertical ≥ 131.4". Rim 120" + ball 9.4" + clearance 2". Spud Webb, Jordan, Carter.

Concept Fundamentals
10 ft (305 cm)
Rim Height
NBA standard
Height × 1.33 avg
Standing Reach
Arm span factor
Rim − Reach
Required Leap
Vertical needed
Vertical jump training
Application
Dunk threshold
Can You Dunk?Use the calculator below for arena and sports metrics

Why This Stat Matters

Why: 131.4" = rim + ball + clearance. Spud Webb 5'7" dunked. Jordan 48" vertical.

How: Enter height, reach, vertical. Get can/can't dunk, training target, NBA comparisons.

  • 131.4" threshold
  • Spud Webb 5'7"
  • Jordan 48" vertical
Sources:NBA
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BASKETBALLFormulaExamples

Basketball Dunk Potential

Reach the rim like Spud Webb and Vince Carter. 131.4" threshold.

Legendary Dunkers — Click to Load

dunk_analysis.sh
$ calc_dunk --reach=95 --vertical=24 --threshold=131.4
Result
Keep training
Max Reach
119"
Required
131.4"
Need Vertical
36.400000000000006"
Training Plan: Gain 13" vertical — ~33 weeks of plyometrics
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Screenshot Summary

Need 36.400000000000006" vertical. Max reach 119". Train ~33 weeks.

Your Reach vs Rim Height

For educational and informational purposes only. Verify with a qualified professional.

🏅 Sports Records

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131.4" = rim + ball + clearance

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Spud Webb 5'7" dunked

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Jordan 48" vertical

Answer Capsule

Rim at 120" + ball 9.4" + 2" clearance = 131.4". Your max reach = standing reach + vertical leap. If max reach ≥ 131.4", you can dunk. Average person needs 28-36" vertical depending on height.

Key Takeaways

  • NBA rims are 10 feet (120") high. Ball diameter ~9.4"; add ~2" clearance.
  • Standing reach + vertical = max reach. Must hit 131.4" to dunk.
  • Plyometrics can add 4-10 inches in 8-12 weeks with consistent training.

Did You Know?

👑Michael Jordan had a 46" vertical leap.
Spud Webb had 42" vertical at 5'7" — won the 1986 dunk contest.
📊Average person needs 28-36" vertical to dunk depending on height.
🏀Plyometrics can add 4-10 inches in 8-12 weeks.
📈Standing reach ≈ height × 1.25 + 8 inches for average proportions.

How It Works

Dunk Threshold = 120" + 9.4" + 2" = 131.4"
Max Reach = Standing Reach + Vertical Leap

NBA rims are 10 feet high. You need to get the ball (9.4" diameter) above the rim with ~2" clearance. Your fingertips must reach 131.4" at peak jump.

Expert Tips

Plyometrics

Box jumps, depth jumps, hurdle hops — 2-3x/week. Expect 1-2" gain per 4-6 weeks.

Strength Base

Squats, deadlifts, calf raises — build base power before plyometrics.

Measure Reach

Stand against a wall, reach up. Measure for accuracy instead of estimating.

4-10" Gain

Plyometrics can add 4-10 inches in 8-12 weeks with consistency.

Comparison Table

PlayerHeightVertical
Michael Jordan6'6"46"
Spud Webb5'7"42"
Vince Carter6'6"43"
Zach LaVine6'5"46"
Average Person5'10"20-24"

Infographic Stats

Dunk threshold
131.4"
Jordan vertical
46"
Webb at 5'7"
42"
Plyo gain
4-10"

Disclaimer: Vertical and reach estimates vary. Consult a coach or trainer for personalized programs. NBA measurements from official sources.

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