Dunk Calculator — Can You Dunk a Basketball?
Find out exactly how much vertical jump you need to dunk a basketball. Enter your height (or better, your standing reach), the rim height and how far above the rim you want your hand — and get the precise leap required.
Units
cm
cm
cm
cm
Very few athletes in the world achieve this vertical leap.
- 1
Standing reach (estimated)
180 × 1.33 = 239.4Estimated as height × 1.33 — enter your measured reach for a more accurate result. - 2
Target height (rim + clearance)
305 + 15 = 320 - 3
Vertical jump needed
320 − 239.4 = 80.6
How does this calculator work?
Vertical jump needed to dunk = (rim height + clearance) − standing reach. Standard rim is 305 cm; standing reach is roughly height × 1.33. Most recreational players need 60–75 cm of vertical leap. Enter your measurements to get the exact gap — and a difficulty rating.
Formula
How this is calculated
To dunk a basketball your hand must clear the rim — typically by at least 15 cm (6 inches) to control the ball and slam it down. The key measurement is your standing reach: how high you can touch with both feet flat on the floor, one arm fully extended. For most people this is about 1.33 times their height, but wingspan and arm length vary; measuring your actual reach gives a more accurate result.
The required vertical jump is simply the target height (rim height plus desired clearance) minus your standing reach. If your standing reach already exceeds the target, no vertical jump is technically required — though a controlled slam still needs some airtime. A standard NBA and FIBA rim is 305 cm (10 ft); some lower rims used in training or recreation are 270–285 cm.
Vertical jump can be improved significantly through plyometric training (box jumps, depth jumps), strength work (squats, Romanian deadlifts) and sprint training. Elite NBA players typically have standing verticals of 60–80 cm. Most recreational players who can dunk have a vertical in the 60–75 cm range paired with an above-average standing reach.
Frequently asked questions
Stand flat-footed next to a wall, raise one arm fully overhead and mark where your fingertips touch. The height of that mark is your standing reach. Wingspan and shoulder flexibility affect it, so it can differ from the height × 1.33 estimate by several centimetres.
You need at least 5–10 cm of wrist-and-hand clearance above the rim to guide the ball over the edge. Most people aim for 15–20 cm of total hand height above the rim for a clean, controlled dunk; with less than that the ball tends to hit the back of the rim.
Yes — studies show 8–16 weeks of targeted plyometric and strength training can improve vertical jump by 5–15 cm for untrained individuals, and somewhat less for those already training. Losing excess body weight also reduces the mass you need to accelerate upward.
Also known as
TG we-Calculate Editorial Team. (2026). Dunk Calculator — Can You Dunk a Basketball? [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/dunk-calculator
TG we-Calculate Editorial Team. "Dunk Calculator — Can You Dunk a Basketball?." TG we-Calculate. 2026. https://we-calculate.com/calculator/dunk-calculator.
TG we-Calculate Editorial Team, "Dunk Calculator — Can You Dunk a Basketball?," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/dunk-calculator
@misc{wecalculate_dunk_calculator, title = {Dunk Calculator — Can You Dunk a Basketball?}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/dunk-calculator}}, year = {2026}, note = {TG we-Calculate} }
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