How Much Does a Basketball Weigh? Official Weights by Size & League

By Sarah Miller · April 10, 2027

Basketballs typically weigh between 20 to 22 ounces (567 to 624 grams), depending on the size, league, and gender-specific standards. The official weight of a regulation NBA basketball is 22 ounces (624g), while WNBA and youth balls are lighter to accommodate different player needs.

Understanding Basketball Weight Standards

The weight of a basketball is carefully regulated to ensure consistency in gameplay across leagues and age groups. While most adult-sized balls fall within a narrow range, variations exist based on level of play, gender, and ball size.

Why Basketball Weight Matters

Impacts shooting accuracy and passing control
Affects player fatigue during long games
Influences dribbling speed and handling
Ensures fairness and standardization in competition

Different Basketball Sizes and Weights by League

Basketball sizes range from Size 3 for young children to Size 7 for adult men. Each size has standardized weight specifications set by major sports organizations including the NBA, WNBA, NCAA, FIBA, and NFHS.

Ball Size	Description	Weight (oz)	Weight (grams)	Circumference (inches)	Governing Body
3	Mini ball for toddlers	8	227	22	NFHS
4	Youth (ages 5–8)	10	283	25.5	NFHS
5	Youth (ages 9–11)	14	397	27.5	NFHS
6	Women’s official size	20	567	28.5	NBA, WNBA, NCAA
7	Men’s official size	22	624	29.5	NBA, NCAA, FIBA

Table data source:1, 2, 3

The data shows a clear progression in weight and size from youth to professional levels. The most commonly used weights are 20 oz for women's basketball and 22 oz for men's, reflecting physiological differences while maintaining competitive balance. Consistent standards across leagues enhance player development and equipment compatibility.

How Weight Varies by Material and Use

Basketballs are made from leather, composite leather, or rubber, each affecting overall weight slightly due to density and construction.

Material Impact on Ball Weight

Leather: Used in NBA and top-tier indoor games; consistent weight at 22 oz
Synthetic Composite: Durable and weather-resistant; often used in outdoor courts; may vary by 0.2–0.5 oz
Rubber: Lightweight and bouncy; common in youth and recreational play

Indoor balls tend to have tighter weight tolerances, while outdoor models may deviate slightly due to rugged design requirements.

Historical Changes in Basketball Weight

Early basketballs in the 1890s were made from laced leather and weighed significantly more—up to 26 oz—with inconsistent shapes. Over time, advancements in materials and manufacturing led to standardized spherical designs and reduced weight variability. By the mid-20th century, the 22-ounce standard was adopted by major leagues and remains unchanged today.

Frequently Asked Questions About Basketball Weight

How much does a size 7 basketball weigh?

A size 7 basketball, used in men's professional and collegiate leagues, weighs exactly 22 ounces (624 grams). This is the standard weight enforced by the NBA, NCAA, and FIBA for official gameplay.

How much does a size 6 basketball weigh?

A size 6 basketball weighs 20 ounces (567 grams) and is the official size for women’s leagues such as the WNBA and NCAA women’s basketball. It offers better handling for smaller hand sizes without sacrificing performance.

Do NBA basketballs weigh the same as college balls?

Yes, both NBA and NCAA men’s basketballs weigh 22 ounces (624g) and use size 7 balls. For women’s college basketball, the ball also matches the WNBA standard at 20 ounces (size 6).

Can ball weight affect shooting performance?

Absolutely. A heavier ball requires more strength and precision, potentially altering shot arc and release timing. Players often train with regulation-weight balls to build muscle memory and consistency under real-game conditions.

Are all brand-name basketballs the same weight?

Reputable brands like Spalding, Wilson, and Molten adhere strictly to league regulations. While minor manufacturing variances (±0.3 oz) can occur, certified game balls maintain weight within acceptable limits for official play.