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Dunk Calculator
Find the vertical jump you need to dunk a basketball.
Vertical to dunk
—
Jump needed.
| To touch the rim | — |
|---|---|
| Standing reach | — |
| Rim height | — |
| — |
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How the Dunk Calculator Works
To dunk, your jump has to lift your hand above the rim with enough clearance to bring the ball down over it — about 6 inches. Subtract your standing reach (how high you touch flat-footed) from the rim height (120 inches on a regulation 10-foot hoop), then add 6 inches of clearance. If your standing reach is 90 inches, you need about a 36-inch vertical to dunk.
Standing reach is roughly 1.3 times your height, but measuring it directly is more accurate. Touching the rim needs less — just rim minus reach.
vertical to dunk = rim height + 6 in − standing reach
Frequently Asked Questions
What vertical do I need to dunk?
Rim height (120 in) plus about 6 inches of clearance, minus your standing reach. A 90-inch reach needs roughly a 36-inch vertical.
What is standing reach?
How high you can touch flat-footed with your arm up — about 1.3 times your height, but best measured directly.
How high is a basketball rim?
10 feet, or 120 inches, for regulation play.
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