Basketball Court Size: Official Dimensions for Every Level of Play

A standard NBA and NCAA basketball court measures 94 feet long by 50 feet wide (28.65m × 15.24m). High school courts are shorter at 84 feet. FIBA international courts sit at 91ft 10" × 49ft 3" (28m × 15m). Rim height is 10 feet across all levels.

Quick Answer: Basketball Court Dimensions at a Glance

Here's the full picture in one place — because most searches for basketball court size are really asking this:

One thing worth noting right away: rim height is 10 feet universally for all senior play — NBA, WNBA, NCAA, FIBA, and high school. That's one of the few constants across every level.

Why Basketball Court Sizes Differ Between Levels

It's a fair question and one that doesn't get answered enough. The short version: different governing bodies set different rules, and court dimensions reflect the physical demands and spacing needs of players at each level.

The NBA and NCAA share the same overall footprint — 94ft × 50ft — but the NBA uses a wider key (16ft vs. 12ft) to account for the size and strength of professional players around the basket. The wider lane forces bigger players to work harder for position.

FIBA courts are marginally smaller — roughly 2 feet shorter and about 9 inches narrower — partly rooted in the historical standardisation of European indoor sports halls, where courts were built before NBA dimensions became a global reference point.

As noted by Wikipedia's overview of the basketball court, in amateur basketball court sizes vary widely, and the international standard has always sat slightly below the NBA's benchmark. In practice, the difference is small enough that players adapt quickly.

High school courts are 10 feet shorter (84ft vs. 94ft) because the game at that level doesn't require the same spacing for fast breaks and offensive sets that professionals rely on. Youth courts scale down further still — both in size and rim height — to keep the game proportionate to younger players' abilities.

The 3-point line is where the most visible level-by-level differences show up. It's been pushed out progressively at higher levels of play to reward elite long-range shooting and to open up space near the basket.

Basketball Court Dimensions by Level of Play

NBA Basketball Court Dimensions

The NBA court is 94 feet long and 50 feet wide — 28.65m × 15.24m for anyone working in metric.

Key specifics:

• Key width: 16 feet (4.88m)
• 3-point line: 23ft 9" from the basket at the top of the arc; 22ft in the corners
• Restricted area arc: 4ft radius from directly below the hoop
• Free throw line: 15ft from the front of the backboard
• Center circle diameter: 12ft (3.66m)

The NBA doesn't mandate a fixed buffer zone around the court perimeter — the clearance between the court boundary and the first row of seats varies by arena. Other governing bodies do specify a minimum buffer.

WNBA Basketball Court Dimensions

The WNBA uses the same full-court dimensions as the NBA — 94ft × 50ft — with a 16ft wide key. The main difference is the 3-point line, which sits at 22ft 1.75" (the same as FIBA and NCAA men's), compared to the NBA's 23ft 9".

College Basketball Court Dimensions (NCAA)

NCAA courts match the NBA's overall size — 94ft × 50ft. But there are two meaningful differences:

• Key width is 12ft for both men's and women's NCAA play (vs. 16ft in the NBA)
• 3-point line distances differ between men's and women's programs

The men's 3-point line moved out to 22ft 1.75" starting the 2020–21 season — aligning it with FIBA international standards for the first time. Before that, it sat at 20ft 9".

Women's NCAA play retains the 20ft 9" 3-point line.

FIBA and Olympic Basketball Court Dimensions

FIBA governs international competition — including the Olympics — and domestic leagues across Europe, Australia, and several other regions.

For domestic (non-Olympic) competitions, FIBA allows some flexibility:

High School Basketball Court Dimensions

High school courts, regulated in the US by the NFHS (National Federation of State High School Associations), are:

• 84 feet long × 50 feet wide (25.60m × 15.24m)
• 3-point line: 19ft 9" from the basket
• Key width: 12ft — same as NCAA

Junior high courts typically follow the same 84ft × 50ft layout, though some states allow 74ft courts at that level.

Youth Basketball Court Dimensions

At youth levels, the goal isn't a scaled-down pro game — it's keeping the proportions manageable so players can develop skills without being overwhelmed by space or distance. Rim heights also drop (commonly to 8ft or 6ft) for the youngest age groups.

Basketball Court Lines and Markings Explained

Understanding the court isn't just about overall size. The internal markings each serve a specific purpose, and several of them vary by level in ways that directly affect how the game is played.

Sidelines and Baselines

The sidelines run the length of the court. The baselines (also called endlines) run behind each basket. On an NBA/NCAA court, sidelines are 94ft and baselines are 50ft. These four lines define the live playing area — the ball is out of play the moment it crosses any of them.

The Key (Free Throw Lane / The Paint)

The key is the rectangular area extending from the baseline to the free throw line under each basket. It's usually painted a contrasting colour — hence "the paint."

What's often overlooked here is that the key dimensions directly shape defensive strategy. In the NBA, defensive players can only remain in the key for 3 seconds unless they're actively guarding an opponent. NCAA and FIBA don't enforce this rule — so a defender can set up camp in the paint for longer stretches, which opens up different tactical approaches.

The Free Throw Line

The free throw line is 15 feet from the front of the backboard at every level of senior play — NBA, WNBA, NCAA, FIBA, and high school. The free throw circle has a diameter of 12ft in the NBA and NCAA.

The 3-Point Line

The 3-point line is the arc beyond which a made basket counts for three points instead of two. Its distance from the basket varies significantly by level:

The NBA shortened its corner 3-point distance from 23ft 9" to a uniform 22ft from 1994 to 1997 — specifically to boost scoring during a period when team averages had dropped sharply.

As documented in Wikipedia's article on the three-point field goal, the distance at the top of the key in the NBA is 23 feet 9 inches, with the corners sitting closer at 22 feet — a distinction that makes the corner three one of the most tactically valuable spots on the modern court.

The Center Circle

The center circle sits at the midpoint of the court and is used for the opening tip-off. Its diameter is 12ft in the NBA and NCAA, and 11ft 10" in FIBA play. There's also a smaller inner circle (4ft diameter) inside it — visible on most professional courts.

The Restricted Area (No-Charge Arc)

Located directly beneath each basket, the restricted area is a small arc inside the key. Any defensive player standing within it cannot draw a charging foul from an offensive player driving to the basket.

The rule was introduced in the NBA in 1997 to stop defenders from tactically positioning themselves under the basket to draw charges. It's a small marking, but it has a meaningful effect on how drives to the basket are officiated.

Half Court Basketball Dimensions

Half-court play is standard when fewer than 10 players are available, or for recreational games. The dimensions are simply half the full court lengthwise:

A half court retains all the standard markings on one end — the key, 3-point arc, free throw line, and restricted area — making it a fully functional court for most game formats.

Backyard and Recreational Basketball Court Sizes

Regulation dimensions aren't always realistic for home courts. In practice, most backyard installations work around available space and budget rather than official specs.

Choosing the Right Size

The 30×30ft half-court is the most common residential choice — it fits a 3-point line (at high school distance) and leaves enough room above the arc to play meaningfully without running out of space.

Backboard Overhang Explained

Backboard overhang is the distance from the baseline to the front face of the backboard. This affects how much usable space you have behind the basket — important for safety.

• Official standard (NBA, college, high school): 4 feet
• Residential range: 0 to 6 feet depending on space
• For courts under 25ft deep: 2ft overhang is workable
• For courts 30ft and larger: 3–4ft overhang is recommended
• Pole padding is always worth installing, regardless of overhang distance

Court Surface Materials

Indoors: NBA courts use hard maple (also called sugar maple or rock maple). According to Wikipedia's entry on the basketball court, indoor courts are almost always made of polished wood, usually maple — chosen for its hardness, tight grain, and ability to withstand the physical demands of a full season. Most players and coaches will tell you the feel of maple is noticeably different from other surfaces.

Outdoors: Asphalt and concrete are the most common materials. They're durable and low-maintenance, though harder on knees over time. Modular interlocking tiles (often polypropylene) are a growing option for backyard courts — easier to install, gentler underfoot, and available in regulation layouts.

A Note on Space Planning

The court boundary is not the same as the slab or surface area you'll need. Allow at least 2–3 feet of clearance beyond every sideline and baseline for out-of-bounds movement and player safety. The full slab for a 30×30ft court should realistically be 34×34ft or larger.

Conclusion

Basketball court size varies by governing body, with NBA and NCAA courts at 94×50ft, FIBA at 28×15m, and high school at 84×50ft. The key, 3-point line, and restricted area all differ by level. For backyard builds, 30×30ft is the practical standard.

Frequently Asked Questions

How big is a basketball court in feet?

An NBA and NCAA basketball court is 94 feet long by 50 feet wide. High school courts are 84 feet long by 50 feet wide. FIBA courts are 91ft 10" × 49ft 3".

What is the standard rim height across all levels?

The rim height is 10 feet (3.05m) for all senior play — NBA, WNBA, NCAA, FIBA, and high school. Youth leagues often lower the rim to 8ft or 6ft depending on age group.

How many laps around a basketball court equal a mile?

On an NBA or NCAA court, you'd need to run approximately 18.3 laps to cover one mile. On a high school court (84ft), that number rises to roughly 19.7 laps.

Why is the NBA key wider than the college key?

The NBA uses a 16ft key to account for the size and physicality of professional players. NCAA and high school use a 12ft key, which is narrower but reflects the smaller scale of play at those levels.

What is a good size for a backyard basketball court?

A 30×30ft half-court is the most practical and popular choice for residential use. It fits a full 3-point line at high school distance and gives enough room for genuine gameplay without requiring a large slab area.