What Are the Dimensions of a Basketball Court?

When constructing a basketball court, choosing the right size and layout is crucial for safety, playability, and meeting players’ skill levels. While professional leagues like the NBA standardise official court measurements, non-pro groups can tailor playable spaces to fit needs. This guide examines key basketball court dimensions and component markings across competition levels ranging from backyard pickup games to the Olympics.

Basketball Court Selector Tool

Use this overview of basketball court sizes and parts to help select the ideal dimensions and configuration for your players and available building space.

What are the parts of a basketball court?

What are the parts of a basketball court?

Before diving into sizing, let’s review the function of common basketball court markings:

Three-Point Arc

The three-point arc is a 180-degree semicircular line measured 19 feet 9 inches from the direct center of the hoop rim. Shots scored outside this three-point range count for three points instead of the regular two. This wider scoring area helps space the floor.

Sidelines and Baselines

The court’s lengthwise boundary lines are called sidelines, while the widthwise backboard-to-backboard lines are termed baselines. Regulation professional sidelines span 94 feet long, with a 50-foot width across baselines. These lines contain play and ball handling within legal court regions. Standard safety margins extend roughly 3 feet or more beyond.

Center Circle

A 4-foot radius circular marking inside the key area defines the center jump ball location, where play starts each game and half. Defenders cannot enter this circular space during opening jump balls.

Key Area/Lane/Paint

The painted rectangular lane underneath each basket leading from baseline to the free throw line contains multiple legally defined spaces for player positioning and zones. The college and professional level key area measures 12 feet across.

Division Line

The division line is the center court line placed midpoint between and parallel to the baselines. This splits sides for lineup positions during center jump balls and marks the court change at halftime.

Different Basketball Court Sizes

Different Basketball Court Sizes

Basketball court dimensions now vary substantially based on target ages and skill levels of players as well as adapted spaces available:

1. Full-Sized Basketball Court (College, NCAA, NBA, Olympics)

The maximum dimensions used in top tier college conferences, March Madness, the NBA, and Olympic basketball is a full 94 feet by 50 feet regulation court. This size includes regulation three-point line distances, college/pro key lane widths, and perimeter safety zones.

2. High School Basketball Court Dimensions

For elite varsity prep teams, while some facilities can accommodate the full 94 x 50 feet professional court size, it’s generally not mandatory. But most do regulate the key/lane area to narrower college width specifications missing in lower junior high divisions.

3. Junior High/Middle School Basketball Court Dimensions

The court size specified for competitive team basketball at these intermediate grade levels measures 84 feet long by 50 feet wide with a slightly condensed three-point arc line set just 19 feet from the center of the hoop or eliminated altogether. The key/lane width also drops down to a maximum of just 12 feet across.

Elementary School Basketball Court Dimensions

Elementary School Basketball Court Dimensions

For formal youth basketball at the elementary level for ages 10 and below, common court sizes downsize further to only 74 feet length by 42 feet width to accommodate smaller players. The three-point arc distance also reduces proportional to age to as close as just 15 feet from the hoop center. Key/lane widths can dip even below 12 feet depending on age.

Dimensions for Small Basketball Courts

For informal recreational environments from driveways to youth centers, narrow side court and half court mini basketball arrangements better fit smaller groups. Half court lengths for youth or backyard play range anywhere from 37 feet to 47 feet while still maintaining regulation 50-foot width for dynamic sideline play. Key/lane widths shrink proportionally.

Basketball Half Court Dimensions

Less common pole-mounted backboard and hoop half court sets used in parks and playground spaces allow smaller 1 on 1 or casual shootaround games. While the overall court space is far below regulation dimensions, the key/lane area underneath typically aligns with standard widths.

3 vs 3 Basketball Court Dimensions

3 vs 3 Basketball Court Dimensions

In very informal 3-on-3 or 21 streetball competitions, small adjacent side by side play on courts just 25 feet wide and 50 feet long allow dynamic games with minimal out of bounds. Rim heights match regulation 10 feet but keys barely exist given much smaller play areas.

25 x 25 Basketball Court Dimensions

On the extreme small end, solo basketball practice spaces in some urban areas can be as little as 25 feet deep and 25 feet wide. Smaller fixed basketball goals sit along the sides with no formal key area needed given no team competition.

Important Design Considerations

When preparing to build a backyard, driveway, or community court, carefully measure available length and width space on your existing surface or site. Next consider primary users including players’ ages, averages skill and height levels, and whether accommodating formal 5-on-5 regulation team play matters or just smaller groups. These factors weigh heavily into choices balancing playability, safety, and budget. If organizing formal teams, also research your state high school athletic association guidelines for minimum court dimensions. Consulting a certified court builder ahead of time is wise as well to map out a tailor-made plan addressing unique needs.

NBA Basketball Court Dimensions

The National Basketball Association strictly mandates regulation 94 feet length by 50 feet width full basketball court dimensions for all professional league arenas hosting games. The NBA also governs hoop and three-point arc line locations, lane/key sizes, perimeter safety zones and more outlined in the court markings section above to follow international standards. NBA specifications apply for both contests and practices.

WNBA Basketball Court Dimensions

In the Women’s National Basketball Association, standard game courts replicate the 94 x 50 feet regulation full court measurements seen across the NBA. Women’s professional basketball also positions three-point arc lines, lane width keys, safety margins and all other court specification identically to the NBA courts used in men’s pro games.

NCAA Basketball Court Dimensions

For college basketball governing body the NCAA’s hundreds of Division I, II and III member schools, rule books mandate teams compete on full regulation basketball court surfaces matching dimensions of 94 feet length and 50 feet width. This allows complete standard gameplay. Custom specifications also cover precise three-point line locations at 19 feet 9 inches from basket center and more to align with international standards. In rare cases, significantly older existing arenas can skirt standards.

High School Basketball Court Dimensions

Regulation court rules are less unified at the high school level given variation across states. But most state athletic associations strongly recommend full length and width specs of 94 feet by 50 feet for competitive varsity and junior varsity high school basketball game play. Passing this certification during annual site inspections qualifies schools to host playoff contests. Some older existing high school gyms can fall below updated building codes however. Three-point line and key sizes also diverge.

FIBA Basketball Court Dimensions

FIBA Basketball Court Dimensions

International basketball play falls under the jurisdiction of the sport’s Switzerland-based global governing body International Basketball Federation (FIBA). For all sanctioned competition, FIBA outlines official basketball court measurements matching the 94 feet length by 50 feet width regulation full court dimensions matching the NBA, WNBA, Olympics and NCAA. Rules also govern three-point arc shape/positioning, key/lane sizing, and more court markings.

The History of Basketball Court Dimensions

The origins of basketball included makeshift hoops and loose informal court layouts with few standards. But as formal gameplay emerged from the YMCA movement, court dimensions evolved across key parts:

The Story Behind the 10-Foot High Hoop

Rather than carefully tested dimensions, historical tales recount how the very first formally mounted hoops emerged at the iconic 10-foot height simply because the athletic director at the Springfield College YMCA gym could reach to initially nail them there as a starting point.

Three-Point Line Background

Though three-point arc lines seem integral to modern gameplay, they only formally developed much later. The upstart ABA league first experimented with three-point baskets back in the 1967-1968 season before the NBA eventually adopted them in 1979. Mel Daniels, an Indiana Pacer, hit the first ABA three-pointer.

Outgrown Cage Courts

In the earliest YMCA years, informal enclosed cages and walls often surrounded courts to let officials more easily retrieve out-of-bounds balls with fewer chases. However, risk of bodily injuries from players crashing into non-flexible enclosures saw open courted delimited by lines replace caged courts entirely by 1904.

In summary, standard basketball court measurements aim to balance spaces accessible for both pros and amateurs while adapting to available venues. Carefully weigh all dimensions from complete length, width, perimeter zones to hoop heights, three-point line distance and more as you plan out your personalized home court oasis. Consider all factors from primary users, budget and configuration of space to local building codes and manufacturer’s safety recommendations.


When designing your dream basketball court, carefully balancing dimensions and layout to meet needs should serve as the foundation. Consider all key factors from primary users to configuration of space, budget, safety recommendations and local building codes. Analyze if you’ll host formal 5-on-5 matchups needing regulation length and width or just small group pickup requiring less space. Factor in players’ ages and abilities as well to scale key components like hoop heights and three-point distance appropriately. Though professional specifications guide top-tier play, recreational environments can and should be tailored. The right court promotes both fun and athlete development. Ultimately by mapping measurements to your players, space and goals, you’ll create a maximally enjoyable and safe basketball haven for all.

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