Ask HOOPSBEAST: How Tall Do You Have To Be To Dunk?

By Max Kesler



how tall to dunk featured image

In this week’s user submitted question, we’ll be answering the question: How tall do you have to be to dunk a basketball on a 10 foot rim?

A lot of basketball players dream of being able to dunk, but are under the false impression that dunking is a skill limited to only the tallest of people.

With the average height of NBA players being 6 ft 7 in/2.01m (based on player statistics from 1985 to 2006), it’s easy to understand why so many people think that way.

However, this assumption is completely wrong. While being taller does carry a substantial advantage, dunking on a 10-foot rim is very possible for shorter folk. (Of course, being able to dunk effectively on a court full of giants defending against you is another story.)

To answer the question, we first need to look at the two key statistics that determine whether or not you can dunk. They are 1) your Standing Reach and 2) your Vertical Jump.

Standing Reach

Standing reach is how high you can reach with one arm while standing. To measure it, simply stand up and reach as high as possible.

People tend to be aware of their own height, but their standing reach? Much less so. But when it comes to dunking, standing reach is everything!

Being tall obviously helps your standing reach, but your arm length is also a major factor.

Your limb length and wingspan are equally important as height

If we look at the NBA Draft Combine, we can find interesting cases such as one where a 6’2″ player has the same standing reach as a 6’9″ tall player!

On average, a person’s standing reach is around 1.33 times greater than their height. We have looked at NBA Draft Combine statistics from 2015 to 2018 and looked at how the reach-to-height ratio (standing reach divided by height) varied among players.

standing reach to height ratios in NBA draft combine 2015-2018

As you can see from the graph, NBA prospects are skewed towards the right. In other words, basketball appears to favor players with longer arms.

That’s why it is essential to stop worrying about your height, and instead measure your standing reach to get a better idea of whether or not dunking is within your reach (pun intended).

Vertical Jump

The other factor determining whether you can dunk is your vertical jump. Find out how to measure your vertical jump.

This part is more interesting because whereas height and reach are genetically determined, your vertical jump can be trained. There are plenty of training programs and YouTube videos out there that can significantly boost your vertical.

Below is a small infographic that gives you an idea of how your standing vertical jumps measure up. Note: A run-up will typically add between 3-7 inches.

Now, let’s get a rough idea of how easy or difficulty it will be to dunk depending on your height.

Difficult: 5′ 7″ – 5′ 9″

While not impossible, dunking at this height will be tough for most people. Let’s assume you’re 5 foot 9 and have average length arms. You’ll then have a standing reach of around 7 foot 7 inches.

That means you’ll need to jump 29 inches to touch the rim. To dunk, you’ll need to be jumping around 35 inches high, which would be considered impressive even in professional sports.

In the NBA there are players who consistently produce 40+ inch running vertical jumps that enable them to perform spectacular dunks in games. Popular examples are Nate Robinson and Spud Webb. However, attaining this level of physicality will be tough.

Nate Robinson is only 5′ 9″ but pulls off some of the most spectactular dunks seen in the NBA

Challenging: 5′ 10″ – 6′

If you are close to being 6-foot tall, dunking becomes a lot easier.

You’ll need to jump roughly 24 inches to touch the rim and 30 inches to dunk a full sized basketball (assuming average arm length).

While the height difference between a 5 foot 9 person and a 6 foot person is only 3 inches, it’s actually a lot easier around this height for two reasons.

First, when you train and are nearing your physical limits, the last few inches are the toughest to gain.

Second, a 6 foot person will (on average) have longer arms, adding another ~1 inch to their standing reach difference.

In this height range, very few people will be able to dunk without training their jump. However, with some training you will be able to dunk quite comfortably.

Normal: 6′ 1″ – 6′ 3″

At this height, athletic people will be able to dunk without any serious form of dunk training.

A lot of NFL and College football players fall in this height range, and being significantly better jumpers than their basketball counterparts due to the explosive nature of football training, dunking will prove no challenge.

Football players make excellent jumpers as they train for explosiveness

Less physically fit people will still need to go through sufficient training.

Easy: 6′ 4″+

Although being this tall you’ll still need to be physically fit in order to dunk, after some explosive conditioning dunking will be relatively easy. You have a big advantage over an average sized person.

However, as the human body becomes bigger, reaction time, acceleration and strength-to-weight ratio decreases. Smaller bodies are typically more athletic than larger bodies. (Human Body Size and the Laws of Scaling, Thomas Samaras 2006).

It’s therefore very rare to see sprinters like the legendary 6′ 5″ tall Usain Bolt. He is very much an exception to the rule – most sprinters fall under the 6′ mark.

Despite this, being tall is definitely more of an advantage than not when it comes to dunking a basketball.

author avatar hoopsbeast
Written by Max Kesler

Max Kesler, a Philly native, is the chief editor at HoopsBeast. He has covered the game at NBA and NCAA levels. He hopes to see his beloved 76ers win a championship soon.

14 thoughts on “Ask HOOPSBEAST: How Tall Do You Have To Be To Dunk?”

  1. I’m 5’9” I was first able to dunk as a freshman in high school at 5’7”. So 14yrs old. The last time I was able to dunk I was 26. During those 12yrs of my athletic peak which included Division 1 college football, I was able to do many different dunks one and two handed.

    • I’m 15 also and I am a freshman, I’ve been trying really hard to dunk and get that goal. Is there any chance you could give me some tips on how to dunk?

      • Not sure how old this post is, but thought I’d give you reason for hope. I’m an old guy. Graduated HS in 1981. My sophomore year I was 6’1”, 160 lbs. I could stand flat footed and touch the bottom of the net, 8 ft.
        That year we did 15-20 mins of jumping exercises every day in practice. But we didn’t know much about weight training then, so never really pumped. After that, from a running start, I could get my whole hand over the rim. But my hands are small. Couldn’t palm a basketball, haha. So in practice I would dunk a volleyball!
        You can do this. I wasn’t that great of an athlete, just tall and skinny and worked hard.

      • Just practice I’ve been dunking since 8th grade and I’m in 10th now and I’m windmilling school goals at 5’11 and im 15

  2. Im 15 and 6’3 if you really wanna dunk you just gotta not think about it and when you go to dunk just clear your head you will feel like your floating and you wont believe how high you are

  3. Well I’m 5″9 and I literally float, I’ve kissed a rim during a rebound before, I was shocked at that and I do dunk and I’ve not done any workout though

  4. I’m 5’6″ with a slightly deformed foot and use to dunk. After casts and orthopedic shoes a relative bought me a Flash comic book and I ran everywhere like a regular Forest Gump. Starting a 6 years old I began running through the woods and jumping from rock to rock trying to cross the river in heavy hiking boots. About that time my dad started me splitting wood too. Yes, I was only 6. By the time I was in 7th grade I could high jump 5’10 in track. I practiced for hours and hours. Run over a mile to school, pe, practice, run home, through the woods. I pounded my Achilles rock solid an by my junior year I was jumping over my friends’ cars. I wrestled in HS and worked out about 4-5 hours a day. Long story short. It’s hard. Be prepared to wear weights everywhere and make sacrifices your non dunking friends aren’t willing too. Do what others have done and get what others have gotten. You must be willing to do more. Now step away from the screen and go jump!!

  5. Around 6′, and I am 54 (turning 55 this year). In 2011, I was 44 and in great shape. I thought that maybe I could dunk, but I wanted to get in better shape before trying. Having injured one knee in 1979, I injured my other knee before I got the chance to make my attempt. I have a permanent limp while walking, but I have kept myself in decent shape. I touched the rim 10 days ago, which makes me wonder if it was actually possible for me to dunk 10 years ago. Who knows?

  6. That’s really motivating I tore my quad tendon about 13 years ago and I’ve always been very pissed abt not being able to jump or play competitive with the guys..I think the same thing but I’m actually going to start practicing

  7. As a 13 year old girl with Osgood Schlatter disease this inspired me so much. I want to set the record for most dunks in womens collage basketball. The fact that you were able to over come this and reach the rim is the most inspiring thing ever to me. I can reach about the middle of the net so far and I work on it every day. I can wait to finally get it in.

  8. I jumped 6’9″ in high school. I improved significantly every summer. I would walk or even run on my toes whenever I could… especially stairs. I jumped rope… a lot of jump rope. Platform jump trainers were big in my day. They are great as long as you know what you are doing with them.


Leave a Comment