Calculadora de Arremesso (Dunk)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
alcance = altura × 1,33 | salto = 317 − alcance
About this calculator
The Dunk Calculator helps you find out how high you need to jump to dunk on a standard basketball hoop, which is 305 cm high. It uses your height to estimate your standing reach (how high you can touch with your fingertips) and then calculates the vertical jump required to reach the rim. The formula is based on average body proportions, making it a useful tool for basketball players and enthusiasts.
To use it, simply enter your height in centimeters. The calculator first estimates your reach by multiplying your height by 1.33. Then it subtracts that value from 317 cm (the rim height plus a small margin for the ball). The result is the vertical jump needed to dunk. For example, a person 180 cm tall has an estimated reach of 239 cm and needs a 78 cm vertical jump.
This tool is ideal for setting training goals, assessing your dunk potential, or just satisfying curiosity. It is helpful for players, coaches, and fans. Keep in mind that the result is an estimate; actual dunk ability depends on arm length, jumping technique, and other factors.
Important considerations: The formula assumes average arm span relative to height. People with longer or shorter arms may have different reaches. Also, the required jump may be higher for a one-handed or two-handed dunk, or if you need to dunk with authority. Use the result as a starting point and adjust based on your personal measurements.
Frequently asked questions
How much do I need to jump if I am 170 cm tall?
With a height of 170 cm, your estimated reach is 226 cm, so you need about 91 cm vertical to reach a 305 cm rim.
Does the calculator consider arm length?
No, it uses an average ratio (height × 1.33). If you have longer or shorter arms, your actual reach may differ.
Why is the target 317 cm instead of 305 cm?
The extra 12 cm accounts for the ball clearing the rim. You need to reach higher than the rim height to dunk.
Can I use this to train my vertical jump?
Yes, it helps set a goal. If the result is higher than your current jump, you know how much to improve.
Does the formula work for kids or very tall people?
It works as an estimate, but body proportions vary. Kids may have shorter arms, and very tall people may have different reach ratios.