Enter your current vertical jump and your standing reach (or let us estimate it from height). This dunk calculator shows whether you can dunk on a standard 10-foot rim, how many inches you are from dunking, and the vertical jump you need to dunk a basketball.
Accuracy note: standing reach varies a lot by wingspan. If you don’t know yours, we estimate it from height — good enough - but measuring reach will always be better.
Enter your numbers and hit Calculate.
We’ll show if you can dunk, how far you are from a dunk, and the vertical you need.
Use these guides to figure out exactly what you need to dunk—based on your height, standing reach, and goals.
Tip: These pages help Google understand your site is the authority on dunking requirements.
To dunk a basketball, most players need to reach about 6 inches above the rim. Depending on height, wingspan, and dunk style, this usually requires a vertical jump between 24 and 36 inches.
Dunking is mostly a simple reach problem. Your max reach is your standing reach plus your vertical jump. On a standard 10-foot rim (120 inches), most players need to reach about 5–8 inches above the rim to control the ball and finish the dunk. That’s why two people with the same height can have completely different dunk results: wingspan and standing reach vary a lot.
If you want the most accurate result, measure your standing reach. If you don’t know it, this dunk calculator estimates standing reach from height (good enough for planning, but measuring is best).
Shorter players generally need a higher vertical jump to dunk, while taller players with longer standing reach can dunk with less. This calculator estimates your standing reach and shows the exact vertical jump you need based on your body measurements.
Your max reach = standing reach + vertical jump. To dunk, you generally need to reach the rim plus a little extra clearance depending on ball size and dunk style.
Stand flat-footed next to a wall, reach as high as you can with one hand, and mark the highest point you can touch. Measure from the floor to that mark (in inches).
Increasing your vertical jump comes down to a mix of strength, explosiveness, and technique. You don’t need fancy equipment, but you do need consistency.
Most people gain their first few inches quickly by fixing technique and strength. The closer you get to dunking, the more important recovery and jump quality become.
A 30-inch vertical jump is enough for many players to dunk, especially if they are 6 feet tall or taller with average-to-good standing reach. Shorter players often need a higher vertical, while taller players with long arms may need less.
Some taller athletes with long arms can dunk with a 24-inch vertical, especially with a one-hand finish. Most average-height players need closer to 28–32 inches to dunk consistently on a 10-foot rim.
Yes. Standing reach often matters more than height because wingspan varies widely. Two players with the same height can have different standing reaches, which changes the vertical jump needed to dunk.
Usually you need to reach slightly above the rim to control the ball and finish—often around 5–8 inches of clearance depending on ball size, grip, and dunk style.