What is the Mass of a Basketball – The Real Explanation You Will Get Here


The mass of an official basketball will be different based on various aspects. The players’ age group plays the most crucial factor because other age groups are likely to play with different-sized balls. For instance, children younger than typically use more petite, lighter balls. A smaller and lighter ball that they would play with during the NBA. In addition, the different leagues have different requirements regarding the weight of basketball. The regulations vary to accommodate various players. There are several different types of basketballs. NBA (National Basketball Association), WNBA (Women’s National Basketball Association), NCAA (National Collegiate Athletic Association) as well as FIBA (Federation Internationale of Basketball) each have their own guidelines regarding the size of the ball.

Before Calculating Mass

If you didn’t pay during your physics class, We’d go over an overview of the distinction between weight and mass. Mass refers to the amount of matter or substance within the object. On the other hand, weight refers to the force of gravity acting upon an object. That is to say, the weight is constant throughout the year; however, weight can change.

The weight (gravitational force) = acceleration x mass

Since we are doing these calculations on Earth, the gravitational acceleration is 9.8 milliseconds. Therefore, our calculation is:

Weight is mass 9.8 9.8

If we already have the weight, which we calculate for all different sizes of basketball, it’s easy to change our formula to determine the mass:

mass = Weight/ 9.8

Then, as the mass must be measured in metric units, we’ll want the weight we weigh, grams, instead of ounces. To do this, we must be aware of the following:

1 oz = 0.27801385 newton

With that data, we can formulate our formula to calculate the mass in the following way:

mass = (Wx0.27801385)/9.8

After we have learned the formula to calculate mass, let’s look at the various group of basketball. As we’ve mentioned, the various age groups use different sizes of balls. Furthermore, several leagues also have standardized the size of a ball based on gender.

The mass of a basketball depends on its size

Size 5

Basketballs of size 5 are considered the most common size for youth, both for girls and boys. The NBA suggests the use of these balls for kids under the age of 11 years old. They weigh around 17 ounces. If we use our calculations to determine the mass, we discover that the weight of a basketball-size 5 can be found to be 0.482 kilograms. It is also possible to check out: Basketball Sizes for Children: For different age groups (5 up to 13+)

Size 6

The size of the official ball for the female NCAA league and the WNBA is size 6. This is the most significant size utilized for any professional company. It is recommended for girls who are over 12 years old. With a weight of 20 pounds, These balls weigh 20 oz and approximately 0.567 grams.

Size 7

The size 7 has become the widely used size for professional basketball, and this is the size used by players playing in the NBA, NCAA, and FIBA. It is important to note that even though both NBA and NCAA require the size 7 ball, there are some distinctions in the ball that is used by each league. The NCAA is not as strict regarding ball rules. Size 7 ball sizes can vary from 20-22 grams, and their circumference could differ in the range of 29.5-30 in.

In comparison, the NBA has a highly stringent set of rules. Spalding manufactures all official balls used in professional games. Size 7 balls have an area of 29.5 inches and weigh 22 ounces. Using our formula to determine the mass of each ball, NBA size 7 balls have a weight of 0.624 grams.


If you’re a basketball player or any other sport, you’ll know that there’s an incredible amount of physics in the game. For instance, one kind of equation is trying to figure out the perfect path for the ball that goes straight to the net. We’ve covered the differences between mass and weight to determine the group of the three most popular basketball sizes. In the professional leagues, sizes 6, 7 and 6 balls will be standard, and the balls vary in weight between 0.567 kg and 0.624 kg.

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