How to Use the Dunk Calculator

A Dunk Calculator estimates whether you can physically dunk a regulation basketball hoop (10 feet or 120 inches high) based on your standing reach and vertical jump.

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What Is a Dunk Calculator?

The Dunk Calculator is an interactive tool that calculates whether you can touch or exceed the 10-foot rim—required for a slam dunk—by combining your vertical leap and standing reach. This calculator is ideal for basketball players, fitness enthusiasts, and athletes training to increase explosiveness.

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How It Works

Input fields:

1. Your Height (in inches) – Your actual height (e.g., 72 inches = 6 feet).
2. Your Standing Reach (in inches) – How high you can reach while standing flat-footed.
3. Your Vertical Jump (in inches) – Your highest jump from a standing position (or running start).

How It’s Calculated:

• The calculator adds your vertical jump to your standing reach.
• If that number is 120 inches or more, you can reach the rim and potentially dunk.

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Example:

• Height: 72 inches
• Reach: 90 inches
• Vertical: 32 inches
  → Max Reach = 90 + 32 = 122 inches
  You can dunk!

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Step-by-Step Instructions

1. Measure your height and enter it in inches.
2. Measure your standing reach by standing next to a wall and reaching as high as possible, then record the height.
3. Measure your vertical jump (use a jump mat or vertical tester if possible).
4. Click “Can I Dunk?”
5. View your Max Reach and a clear result showing if you’re dunk-ready or how much more you need to improve.

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Dunk Calculator FAQ

Q1: What is standing reach, and why does it matter?
A: Standing reach is how high you can reach with one hand while standing. It’s the foundation of how close you already are to the rim before jumping.

Q2: How accurate is the calculator?
A: It gives a solid physical estimate based on reach and vertical. However, it doesn’t account for timing, technique, or ball control—key skills for an actual dunk.

Q3: Why 120 inches?
A: A basketball hoop is 10 feet (120 inches) high. To dunk, your hand needs to reach at least that height.

Q4: Can shorter players still dunk?
A: Absolutely, with a high enough vertical. Some players under 6 feet have achieved this through explosive training.

Q5: How can I improve my vertical jump?
A: Plyometrics, strength training, sprinting drills, and consistent jump practice are effective. Programs like Vert Shock or Air Alert also focus on this.

Q6: Is this only for basketball?
A: While designed for dunking, it’s useful for any sport where vertical jumping ability is important—like volleyball, track, or parkour.