DUNK CALCULATOR: How high do you have to jump to dunk?

How does the Dunk Calculator work?

Step 1:

Enter your personal standing reach. Find out how to estimate your standing reach from your height here.

Step 2:

Put in how high you need to reach above the rim to be able to dunk. Six inches is the default value.

Step 3:

The vertical jump calculator will tell you the jump height you need to touch the rim, to dunk or throw down the Vince Carter 360° windmill.

Step 4:

Use the visual analysis graph and find out more about hang time, speed of dunk and take-off velocity
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Hey there, I'm Andy. 

I want to teach you everything about vertical jumping!

You're about to jump WAY higher!

Enter your profile:

Standing reach:

ft in

Height of rim:

ft in

Extra reach for dunk:



Get the Dunk Calculator on iOS

This is how high you need to jump:

To touch the rim you need a vertical jump of: 


To dunk a basketball you need to jump:


To do a 360 Windmill like Vince Carter you need a vertical jump of:

Plane of Flight Graph

Jump Height

To Touch Rim

To Dunk

Visual Analysis of:
Characteristics of Jump:

Jump Height

Hang Time

Eff. Hang Time

Speed of Dunk

Take-off velocity

Interesting facts when analyzing Vertical Jumps :

  • When you are asking yourself: "How tall do I have to be to dunk?" - you are asking the wrong question!
    Wingspan is also very important as it is a big part of the standing reach.
  • If you have a vertical jump of 100cm you will be spending more than 50% of the hang time above 72cm. This explains why it oftens seams as if a jumper is "stopping" mid air.
  • If you can jump just high enough to squeeze in dunks right now, then an improvement of only a few inches can have a huge impact.
    For example if you need a jump height of 30 inches to dunk and you can jump exactly 30 inches you have an effective hang time of 0.39 seconds. This will be the fastest time in which you can complete a dunk.
    If you improve your vertical jump by only 2 inches your effective hangtime increases by 30% to 0.51 seconds giving you much more time in the air for stuff like windmills.
    The speed of the dunk becomes much faster as you can complete a dunk within 0.31 seconds making you much harder to block!
  • While small dunkers have to train a lot more to make a dunk they also have the advantage of great hang time.