Measuring the diameter of a basketball is straightforward and can be done at home: Use a flexible measuring tape to determine the circumference of the ball by wrapping it around the widest part. Divide the circumference by pi (π, approximately 3.14159) to calculate the diameter. For example, if a basketball’s circumference is 29.5 inches, its diameter can be calculated as: ... https://basketballinn.com/diameter-of-a-basketball/