Dunk Calculator
The Dunk Calculator estimates your required vertical jump based on your height, standing reach, and preferred dunk style. This tool helps basketball players and athletes set precise training goals to finally dunk a basketball. Whether you are a beginner assessing your potential or a coach designing a workout program, this calculator provides educational targets to guide your progress. It accounts for rim height and extra inches needed for specific moves like windmills.
How Required Vertical Jump Is Calculated
The required vertical jump represents the minimum distance you must travel upward to successfully force the ball through the hoop. We determine this by comparing the basketball rim's height to your standing reach and adding a buffer for the ball.
Required Jump = Rim Height - Standing Reach + Extra Height
Where:
- Rim Height: Standard height is 120 inches (10 feet)
- Standing Reach: Your maximum reach while standing flat-footed
- Extra Height: Additional inches needed (6" for standard, 8" for two-hand, 10" for windmill)
First, we establish the rim height, which is usually 120 inches for regulation hoops. Next, we subtract your standing reach to find the gap you need to close. Finally, we add extra inches based on your dunk style because you need to get the ball over the rim, not just touch it.
This method ensures you aim for a realistic target that accounts for the mechanics of actually dunking rather than just touching the iron.
What Your Required Vertical Jump Means
Your result is the specific leap height necessary to execute a successful dunk. This number serves as a benchmark for your athletic training and helps you understand the physical demands of different dunk styles. Use this number to design a workout that focuses on explosive leg power.
Performance Benchmarks
- Under 24 inches: Most varsity high school players can achieve this. If your result is here, you likely have the natural ability to dunk now with minimal training or just technique refinement.
- 25 to 34 inches: This is the most common range for dedicated athletes. You fall into the average to above-average category and need a structured jump program to reach your goal safely.
- 35 inches or more: You are targeting an elite level of athleticism comparable to college players. Focus on heavy squats and plyometrics to achieve this difficult feat.
Note that results for two-handed or windmill dunks will naturally be higher, requiring significantly more power. Improving your jump technique can sometimes reduce your required jump by a few inches as you become more efficient.
Important: This tool provides estimates for athletic planning and is not a substitute for professional coaching. Always consult with a qualified trainer or healthcare provider before starting a new high-intensity exercise program to prevent injury.
Retest your vertical jump every 4 to 6 weeks to track progress toward your goal and adjust your training intensity as needed.
Calculation logic verified using publicly available standards.
View our Accuracy & Reliability Framework →