How Heavy Is a Basketball? Official Weights by League

By Sarah Miller · September 25, 2027

A standard basketball weighs between 20.7 and 22 ounces (586 to 624 grams), depending on the league, gender, and age group. The official game ball for men's leagues, such as the NBA, is 22 ounces, while women's leagues like the WNBA use a slightly lighter ball at 20 ounces.

Understanding Basketball Weight Standards

Basketball weight varies based on competition level, player age, and gender. The weight directly affects handling, shooting accuracy, and overall gameplay. Using the correct ball ensures fair play and reduces injury risk.

Key Factors Influencing Basketball Weight

Gender: Men’s and women’s leagues use different ball weights and sizes.
Age Group: Youth players use lighter balls to accommodate smaller hands and strength levels.
League Regulations: Official organizations like the NBA, NCAA, FIBA, and NFHS set specific standards.
Material: Leather, composite, and rubber affect both weight and grip.

Official Basketball Weights by League

Different governing bodies have standardized basketball specifications to ensure consistency in play. Below is a detailed comparison of official weights across major leagues.

League/Organization	Ball Size	Circumference (inches)	Weight (ounces)	Weight (grams)
NBA (Men)	Size 7	29.5	22.0	624
WNBA (Women)	Size 6	28.5	20.0	567
NCAA Men	Size 7	29.5	22.0	624
NCAA Women	Size 6	28.5	20.0	567
FIBA Men	Size 7	29.5	22.0	624
FIBA Women	Size 6	28.5	20.0	567
NFHS Boys	Size 7	29.5	22.0	624
NFHS Girls	Size 6	28.5	20.0	567
Youth (Boys & Girls)	Size 5	27.5	17.0	482
Mini Basketball	Size 3	22.0	10.0	283

Table data source:1, 2, 3

The data shows a clear distinction between men's and women's regulation basketballs, with a consistent 2-ounce (57g) difference. Size 7 (22 oz) is standard for adult male players across all major leagues, while Size 6 (20 oz) is used universally in women’s competitions. Youth and mini balls are significantly lighter, supporting skill development in younger athletes.

Why Basketball Weight Matters

The weight of a basketball impacts shooting mechanics, passing precision, and dribbling control. A heavier ball can strengthen hand and forearm muscles over time but may hinder performance if too heavy for the player’s strength level.

Effects of Incorrect Ball Weight

Poor shot arc and reduced shooting accuracy
Inconsistent passing due to fatigue or strain
Increased risk of wrist and hand injuries
Slower dribbling and reduced ball handling

How Weight Affects Performance

Players training with a slightly heavier ball may experience improved strength and control, but should balance this with game-standard balls to maintain proper technique. Conversely, using a lighter ball can help younger players develop confidence and form without strain.

Training Tips Based on Ball Weight

Use regulation-weight balls during game simulations
Incorporate weighted training balls (up to 25% heavier) for short drills
Ensure youth players use age-appropriate sizes to avoid injury
Check inflation pressure regularly—under or over-inflation alters effective weight