Touching the rim and dunking are different jumps, and so are different kinds of dunk. A basic dunk only has to get your hand and the ball over the rim. A windmill, a 360 or a between-the-legs finish asks for more time and height above the rim to complete the move, so the vertical you need grows with the style. The calculator expresses this as a margin: how far above the rim your fingertips must reach.
The six types compared
The vertical column assumes a standing reach of 7′ 7″ on a 10 ft rim. Change the reach and every row shifts by the same amount.
| Type | Above the rim | Vertical needed | What it represents |
|---|---|---|---|
| Touch Rim | +0 in | 29 in | Fingertips reach rim height. Not a dunk. |
| Basic Dunk | +6 in | 35 in | Planning margin: fingertips 6 in above the rim so hand and ball clear it. |
| Power Dunk | +8 in | 37 in | Planning margin: 8 in above the rim for a more forceful finish. |
| Windmill | +10 in | 39 in | Planning margin: 10 in above the rim to swing the ball around first. |
| 360° Dunk | +12 in | 41 in | Planning margin: 12 in above the rim to spin before finishing. |
| Between Legs | +14 in | 43 in | Planning margin: 14 in above the rim to pass the ball between your legs. |
The margins are planning choices for this calculator, not official standards. They suit a quick comparison, and you can replace any of them with your own number in the advanced options.
Touch rim, basic dunk and power dunk
Touching the rim is the baseline: fingertips at rim height and nothing more. It is not a dunk, and the calculator reports it separately for that reason. A basic dunk adds about 6 in so the ball clears the iron, and a power dunk adds a little more for a stronger finish. If your reach arithmetic cannot clear the basic dunk, the fancier types are further away still.
Windmill, 360 and between the legs
These are the showpiece dunks. They ask you to swing, spin or pass the ball before you finish, so your hand has to be higher for longer. The jump grows with each one, up to a between-the-legs finish at about 14 in above the rim, which for a 7′ 7″ reach is 43 in. Treat them as later goals. Strong take-off mechanics and timing matter at least as much as the extra inches.
What changes the margin you need
- Hand size. A bigger hand can finish with less height above the rim, and a smaller hand needs more.
- Ball size. Women's and youth basketballs are smaller than the men's size 7, which makes the finish easier to learn.
- Ball control and timing. The calculator cannot see these, and they often decide the result.
Where to go next
Pick a type in the dunk calculator to see your own gap. For the numbers by height, see the vertical needed to dunk by height, and for a realistic route to the first one, read can short players dunk.
Frequently asked questions
Which dunk is the easiest?
Are the margins official?
Is touching the rim the same as dunking?
Get your own number
Enter your height, reach and vertical in the dunk calculator to see the jump you need and the gap left.