OnlineTool.me

Dunk Calculator

Enter standing reach, target clearance, and current vertical jump to get the height needed and your remaining gap.

Estimate the Vertical Needed to Dunk

Enter standing reach, current vertical jump, and target hand clearance above a regulation rim.

Your required vertical jump and progress gap will appear here.

How to Use Dunk Calculator

1

Measure Standing Reach

Stand flat-footed and measure the highest point reached with one hand.

2

Set a Clearance Goal

Use zero to model touching the rim or add hand clearance for a dunk-oriented target.

3

Compare Your Current Jump

Enter a measured vertical to see the remaining reach gap.

Dunk Calculator Features

  • Regulation 10-foot rim geometry
  • Touch-rim or custom clearance targets
  • Optional current-jump comparison
  • Inches and centimetres

Common Use Cases

Set a measurable jump target

Turn standing reach into the vertical displacement required for a chosen hand clearance.

Track training progress

Compare a measured current vertical with the same target over time.

Limits and Important Notes

Result type: Planning estimate

Calculation Details

  • Use the regulation rim height of 120 inches or 304.8 centimetres.
  • Add the desired hand clearance above the rim.
  • Subtract standing reach and compare the result with current vertical jump.

Formula

Required vertical = rim height + target clearance − standing reach

Rounding

Jump heights display to one decimal inch or centimetre.

Default Assumptions

  • Standing reach and vertical jump use the same measurement method.
  • Six inches of hand clearance is a configurable planning target, not a universal dunk threshold.
  • The calculation describes vertical reach geometry only.

Verified Example

Inputs: 96-inch standing reach, 6-inch target clearance, and 24-inch current vertical.

Calculation: 120 + 6 − 96 = 30 inches required; 30 − 24 = 6 inches remaining.

Result: Required vertical = 30 in; progress gap = 6 in.

Sources and Version

Version: 10-foot regulation rim geometry

Last verified: 2026-08-12

Update responsibility: OnlineTool.me

  • Ball size, grip, approach jump, timing, coordination, fatigue, and technique affect real dunk ability.
  • Use a safe measured jump rather than an unverified estimate.
  • Jump training carries injury risk; progress gradually and seek qualified coaching when appropriate.

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Frequently Asked Questions