What vertical jump do I need to dunk?

It depends on standing reach. Vertical needed ≈ (rim height + clearance) − standing reach. Many athletes fall in the 24–36 inch range, but long arms can reduce the requirement and shorter reach increases it.

Do I need to reach above the rim to dunk?

Usually yes. Most dunks require about 5–8 inches of clearance above the rim depending on ball size and dunk style.

Does two-hand dunking require more vertical?

Typically yes. Two-hand dunks usually need more clearance and control, so the required vertical is often a couple inches higher than a one-hand finish.

Dunk Calculator

Vertical Jump Needed to Dunk

The most accurate way to answer “how much vertical do I need to dunk?” is by using standing reach. Height helps, but standing reach (wingspan + shoulder structure) is what determines your dunk requirement.

← Dunk Calculator Standing Reach Average Vertical 6'3 Dunk Guide

The formula

Vertical needed ≈ (rim height + clearance) − standing reach

Rim height: standard is 120 inches (10 feet).
Clearance: how far above the rim you must reach to finish (usually 5–8 inches).
Standing reach: your flat-foot reach with one hand.

If you don’t know standing reach, use the homepage dunk calculator and either measure reach or let it estimate.

Quick chart (by standing reach)

Assumes a 10-foot rim and ~6 inches of clearance for a typical one-hand dunk.

Standing Reach	Vertical Needed (approx.)
92 in	~34 in
94 in	~32 in
96 in	~30 in
98 in	~28 in
100 in	~26 in
102 in	~24 in
104 in	~22 in

How ball size & dunk style change the number

Men’s ball: usually needs slightly more clearance than a women’s ball.
Two-hand: often needs ~1–3 inches more vertical than one-hand.
Lob / alley-oop: catching can add clearance needs depending on timing and control.

Most common mistakes

Using height instead of reach: two people at 6'0 can have very different standing reaches.
Confusing approach vs standing vertical: measure the same way you plan to dunk.
Ignoring clearance: touching rim isn’t the same as dunking—control matters.

Best next step

Measure standing reach once. It takes 60 seconds and makes every dunk estimate (and training goal) more accurate.

Measure/estimate standing reach →

FAQ: What’s a “good” vertical for dunking?

A lot of recreational athletes are in the teens to low 20s. Many consistent dunkers are closer to the high 20s to mid 30s depending on standing reach and technique.

FAQ: Can technique add inches?

Yes—arm swing, penultimate step timing, and takeoff mechanics can add inches quickly, especially if you’re new to jumping.