Dunk Calculator
Find out how high you must jump to dunk a basketball. Enter your height, standing reach, and rim height to get the vertical jump you need. Free and no signup.
How High Do You Need to Jump to Dunk?
Dunking requires your standing reach plus a vertical jump high enough to get the ball over the rim with clearance. A regulation basketball rim is 10 feet (305 cm) high. This calculator finds the vertical jump needed using your height, standing reach, and rim height.
Standing Reach Estimate
If you do not know your standing reach, the tool estimates it as height multiplied by 1.33, a common approximation used in dunk calculators. For best accuracy, measure your reach with shoes off and arms fully extended upward against a wall.
Track jumping conditioning with our Burpee Calorie Calculator during plyometric training sessions.
Frequently Asked Questions
How much vertical jump do I need to dunk?
Vertical jump needed equals rim height plus ball clearance minus standing reach. Standard clearance is about 6 inches (15 cm) above the rim.
What is the height of a basketball rim?
A regulation rim is 10 feet or 305 cm from the floor. Youth leagues use lower rims from 7 to 9 feet depending on age group.
Can short players dunk?
Yes. Players like Nate Robinson at 5 feet 7 inches have dunked in the NBA. A high vertical jump and strong standing reach relative to height make dunking possible without being tall.
How do I measure standing reach?
Stand flat against a wall, reach up with one arm fully extended, and mark the highest point your fingertips touch. That distance from the floor is your standing reach.
How can I improve my vertical jump?
Squats, box jumps, and plyometric training build explosive leg power. Track progress every few weeks and focus on proper jump mechanics with full arm swing and hip drive.
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