Basketball Court Measurements: Official Dimensions for NBA, NCAA, FIBA & High School

Basketball court measurements vary depending on the governing body — an NBA court is not the same size as a FIBA or high school court. Here is a clear breakdown of every regulation court size, line, and marking across all major levels of play.

Quick Answer — Basketball Court Measurements at a Glance

Most standard basketball courts share the same width, but differ in length, key width, and 3-point line distance. The table below covers the key dimensions across all major governing bodies.

Area of Court	NBA	WNBA	NCAA (Men)	NCAA (Women)	FIBA	High School
Court Length	94ft (28.65m)	94ft (28.65m)	94ft (28.65m)	94ft (28.65m)	91ft 10" (28m)	84ft (25.60m)
Court Width	50ft (15.24m)	50ft (15.24m)	50ft (15.24m)	50ft (15.24m)	49ft 3" (15m)	50ft (15.24m)
Rim Height	10ft (3.05m)	10ft (3.05m)	10ft (3.05m)	10ft (3.05m)	10ft (3.05m)	10ft (3.05m)
Center Circle Dia.	12ft (3.66m)	12ft (3.66m)	12ft (3.66m)	12ft (3.66m)	11ft 10" (3.6m)	12ft (3.66m)
Key Width	16ft (4.88m)	16ft (4.88m)	12ft (3.66m)	12ft (3.66m)	15ft 9" (4.8m)	12ft (3.66m)
Free Throw Line	15ft (4.57m)	15ft (4.57m)	15ft (4.57m)	15ft (4.57m)	15ft 1" (4.6m)	15ft (4.57m)
3-Point Line (arc)	23ft 9" (7.24m)	22ft 2" (6.75m)	22ft 2" (6.75m)	20ft 9" (6.32m)	22ft 2" (6.75m)	19ft 9" (6.01m)
3-Point Line (corner)	22ft (6.71m)	21ft 8" (6.60m)	—	—	—	—
Restricted Area	4ft (1.22m)	None	4ft (1.22m)	None	4ft 1" (1.25m)	—

All free throw line distances measured from the backboard face.

Why Basketball Court Dimensions Differ Across Levels

Not all basketball courts are the same — and that is by design, not accident.

Governing Bodies and Their Role in Setting Court Standards

Each level of basketball is governed by a separate body: the NBA sets rules for professional play in North America, the NCAA governs US college basketball, FIBA oversees international and Olympic competition, and individual state associations handle high school standards. Each body sets its own court specifications independently, which is why the numbers don't always line up.

How Playing Style and Rule Differences Drive Dimensional Choices

The differences aren't arbitrary. The NBA uses a wider key — 16ft versus the NCAA's 12ft — partly because professional players are significantly larger and the wider lane creates more space for post defense and interior play.

FIBA courts are marginally smaller overall, reflecting a European facility standard that predates the NBA's influence. High school courts are shorter — 84ft instead of 94ft — because younger players benefit from a less physically demanding court length.

In practice, most court builders and facility planners reference these distinctions carefully, since retrofitting a court to meet a different governing body's standard after construction is costly.

NBA Basketball Court Measurements

The NBA plays on what many consider the benchmark regulation basketball court — though it is worth noting that FIBA's international standard differs in several meaningful ways.

Overall Court Size

An NBA court measures 94ft long and 50ft wide — or 28.65m × 15.24m in metric. In yards, that is roughly 31.33 × 16.67. The court sits inside a larger arena floor, but the playing surface itself is strictly defined.

Unit	Length	Width
Feet	94	50
Yards	31.33	16.67
Meters	28.65	15.24

The Key / Free Throw Lane — Width, Length & the 3-Second Rule

The key — also called the paint or the free throw lane — runs from the baseline to the free throw line. In the NBA it is 16ft (4.88m) wide and approximately 19ft (5.8m) long.

The wider key matters for one specific reason: the NBA's 3-second violation rule. Defensive players cannot stand in the paint for more than 3 consecutive seconds unless actively guarding an opponent. A wider lane forces defenders to move more, which opens the game up. The NCAA and FIBA do not enforce this defensive 3-second rule — which is part of why their keys are narrower.

3-Point Line Distance — Arc & Corner Measurements

The NBA 3-point line sits at 23ft 9" (7.24m) from the center of the basket at the top of the arc. In the corners, the distance shortens to 22ft (6.71m). The straight sections of the line run parallel to the sidelines, starting 3ft (0.91m) from the sideline.

According to the NBA Official rulebook on court dimensions and equipment, the three-point field goal area consists of parallel lines 3ft from the sidelines and an arc of 23ft 9" from the middle of the basket — making it one of the most noticeable differences between the NBA, NCAA, and FIBA courts.

Why the NBA 3-Point Line Distance Changed

The NBA actually moved the corners of the 3-point line closer — from 23ft to 22ft — during the 1990s to encourage more 3-point shooting and higher-scoring games. It worked, to a degree. Corner 3s became one of the most efficient shots in the game, and that legacy is still felt in how modern offenses are built.

Restricted Area / No-Charge Arc

The restricted area is a semicircle with a 4ft (1.22m) radius drawn underneath each basket. If a defensive player is standing within this arc when an offensive player makes contact, no charging foul can be called — the defense is considered out of position. It was introduced in the NBA in 1997 to stop defenders from planting themselves under the basket to draw fouls.

Backboard Dimensions & Inner Rectangle

The backboard is a 6ft (1.83m) wide × 3.5ft (1.07m) tall rectangle. A smaller inner rectangle — 24" wide × 18" tall — is marked in white at the center behind the rim. This inner box is the visual reference players aim for on bank shots.

Rim Height & Ring Specifications

The rim sits exactly 10ft (3.05m) above the floor. The ring itself has an inside diameter of 18", and the net hangs 18" below it. The rim is painted orange and positioned so its nearest inner edge is 6" from the backboard face.

Buffer Zone Around the Court

The NBA does not specify a minimum buffer zone width, unlike FIBA. In practice, NBA arenas include a few feet of clearance between the court boundary and courtside seating or equipment — but the exact distance varies by arena.

NCAA College Basketball Court Measurements

College courts share the same overall footprint as NBA courts but differ in two important areas: key width and 3-point line distance.

Overall Court Size

NCAA courts — both men's and women's — measure 94ft × 50ft (28.65m × 15.24m). Same length, same width as the NBA.

Key Width vs. NBA — What the Difference Means in Play

The NCAA key is 12ft (3.66m) wide, compared to the NBA's 16ft. That 4-foot difference is more noticeable on the court than it sounds. A narrower lane means post players can operate closer to the basket with less space to defend around them.

Interestingly, the NCAA also does not enforce a defensive 3-second rule, so a defender can park inside that narrower key for an extended period — a tactical advantage that does not exist in the NBA.

3-Point Line Distance — Men's vs. Women's

Men's NCAA 3-point line: 22ft 2" (6.75m) from the basket. Women's NCAA 3-point line: 20ft 9" (6.32m).

Both are shorter than the NBA arc of 23ft 9", which is why players transitioning from college to the NBA often find the pro 3-point line a meaningful adjustment.

Restricted Area

The NCAA men's game includes a restricted area arc at 4ft (1.22m) from the basket center — the same radius as the NBA. Women's NCAA play does not use a restricted area arc.

FIBA & Olympic Basketball Court Measurements

FIBA governs basketball at the Olympics and in most of Europe, Asia, and Australia. Its court dimensions are close to the NBA's but not identical.

Official Olympic Court Size

FIBA's international standard court is 91ft 10" long and 49ft 3" wide — or exactly 28m × 15m in metric. That makes it about 2 feet shorter and slightly narrower than an NBA court.

Domestic FIBA Size Ranges by Level

For domestic competition, FIBA allows some flexibility:

Level	Length (m)	Width (m)	Playing Surface
International	28	15	Elastic wooden
Premier	26–28	14–15	Semi-sprung wooden or synthetic
Club	26–28	14–15	Semi-sprung wooden or synthetic
Community	26–28	14–15	Semi-sprung wooden or synthetic

Key Width & 3-Point Line Differences vs. NBA

FIBA uses a key width of 15ft 9" (4.8m) — wider than the NCAA's 12ft but slightly narrower than the NBA's 16ft. The FIBA 3-point line sits at 22ft 2" (6.75m), which is shorter than the NBA's top-of-arc distance of 23ft 9".

WNBA Basketball Court Measurements

WNBA courts use the same overall dimensions as NBA courts — 94ft × 50ft — but there are differences in the markings.

3-Point Line Distance

The WNBA 3-point arc sits at 22ft 2" (6.75m) at its furthest point, with corner distances of 21ft 8" (6.60m). Both are shorter than NBA distances.

Key Width & Rule Differences vs. NBA

The WNBA uses a 16ft (4.88m) wide key — same as the NBA. However, the WNBA does not use a restricted area arc, which means charging foul calls under the basket are handled differently than in the NBA men's game.

High School Basketball Court Measurements

High school courts are noticeably smaller than NBA and college courts — primarily in length.

Standard High School Court Size

A regulation high school basketball court is 84ft (25.60m) long and 50ft (15.24m) wide. The key is typically 12ft wide, the same as college, and the free throw line remains 15ft from the backboard — consistent across all levels.

Junior High Court Size & 3-Point Line Distance

Junior high courts are generally the same size as high school courts: 84ft × 50ft. The 3-point line for junior high play is typically set closer than the high school distance, though exact measurements can vary by state association. High school itself uses a 3-point line of 19ft 9" (6.01m).

Youth & Grade-Level Court Sizes

Youth basketball courts scale down further based on age group:

Level	Length	Width
High School	84ft (25.60m)	50ft (15.24m)
Junior High	84ft (25.60m)	50ft (15.24m)
4th & 5th Grade	74ft (22.56m)	50ft (15.24m)
2nd & 3rd Grade	50ft (15.24m)	42ft (12.80m)

Basketball Court Lines & Markings Explained

Every line on a basketball court has a specific function — and a few of them carry rules that catch even regular viewers off guard.

Sidelines & Baselines

The two long boundary lines running the length of the court are sidelines. The two shorter lines behind each basket are baselines (or endlines). Any player or ball that touches or crosses these lines is out of bounds.

Center Circle

The center circle sits at the exact midpoint of the court. It has a diameter of 12ft (3.66m) in the NBA — slightly smaller in FIBA at 11ft 10" (3.6m). It is used for the opening tip-off at the start of each game and each overtime period.

The Key / The Paint — and Why It's Painted a Different Color

The key is the rectangular zone running from each baseline to the free throw line. It's called "the paint" because it is typically painted a contrasting color — making it easy for referees to spot positioning violations like the 3-second rule. The basketball key measurements differ by level: 16ft wide in the NBA, 12ft in college and high school.

Free Throw Line

The free throw line is drawn 15ft from the face of the backboard at every level of play — high school through NBA. It is 2 inches wide and runs parallel to the baseline. Players must stay behind it until the ball hits the rim on a free throw attempt.

3-Point Line

The 3-point line is an arc that extends from one side of the court to the other. Any shot made with both feet behind this line scores 3 points; any shot from inside it scores 2. The 3-point line distance varies significantly by level — from 19ft 9" at high school to 23ft 9" at the NBA arc.

Restricted Area Arc — Origin and Purpose

The restricted area arc is a semicircle directly under each basket. Its purpose is straightforward: it prevents defenders from standing in that zone and drawing charging fouls on driving offensive players. The NBA introduced it in 1997. What's often overlooked is that the WNBA does not use one, even though the overall court size is the same.

Hash Marks — Types and Placement

Basketball courts include several sets of hash marks:

• Sideline hash marks — drawn 28ft from the baseline, extending 3ft onto the court
• Baseline hash marks — drawn 3ft from the free throw lane line, extending 6" onto the court
• Free throw circle hash marks — drawn parallel to the baseline, 13ft from baseline, 3ft from the lane lines, 6" in length

These are small but functionally important — they define legal positioning for players during free throws and certain out-of-bounds situations.

Substitution Box

Two hash marks are drawn perpendicular to the sideline in front of the scorer's table — 4ft on each side of the midcourt line. This 8ft zone is the designated substitution area where players wait before entering the game.

Half Court Basketball Dimensions

A half court is simply one end of a regulation court — widely used for casual play, youth training, and smaller facility setups.

Level	Length	Width
NBA / College	47ft (14.33m)	50ft (15.24m)
High School	42ft (12.80m)	50ft (15.24m)
Junior High	42ft (12.80m)	50ft (15.24m)

Rules and Common Uses of a Half Court

Half-court games follow the same basic rules as full-court play but use only one basket. The 3-point line, key, and free throw line are all present on a half court — making it a practical option when space is limited. In practice, most recreational outdoor courts and school gyms with limited space default to a half-court layout.

Basketball Court Surface Materials

The surface a basketball court is built on affects gameplay, player safety, and maintenance requirements — more than most people initially assume.

Indoor Courts — Hard Maple and Why It's Used

The vast majority of professional and collegiate indoor courts use hard maple — sometimes called sugar maple or rock maple.

 As noted by Wikipedia's overview of the basketball court, indoor basketball courts are almost always made of polished wood, usually maple, which offers a reliable combination of hardness, durability, and moderate shock absorption. That cushioning effect reduces impact on players' knees and ankles over the course of a game.

Most facility managers working with indoor wooden courts report that proper seasonal maintenance — sanding, resealing — can extend a court's lifespan significantly.

Outdoor Courts — Concrete, Asphalt & Synthetic Options

Outdoor basketball courts are most commonly built on asphalt or concrete. Asphalt is the standard for public parks — it's hardwearing, relatively affordable, and provides a fast, high-bounce surface. Concrete is more durable long-term but harder on joints.

Synthetic rubber or modular tile surfaces are increasingly used for backyard or multi-sport courts, offering better cushioning than asphalt.

Out-of-Bounds Clearance & Construction Considerations

When building a basketball court, the playing surface itself is only part of the footprint. A safe installation typically requires at least 3–5ft of clearance beyond each boundary line — more if the court is enclosed or near walls.

This out-of-bounds buffer accommodates player movement after the ball and prevents collisions with fencing or structural elements. For a full NBA-sized court (94ft × 50ft), planners generally budget a total slab size closer to 100ft × 60ft as a working minimum.

Conclusion

Basketball court measurements follow consistent logic across levels — the rim height and free throw line distance never change, while overall court size, key width, and 3-point line distance vary by governing body. Knowing these distinctions matters whether you're planning a build, coaching a team, or just settling an argument about court sizes.

Frequently Asked Questions

What is the standard size of a basketball court?

The standard NBA and college basketball court size is 94ft × 50ft. High school courts are smaller at 84ft × 50ft. FIBA international courts measure 91ft 10" × 49ft 3" (28m × 15m).

How far is the 3-point line in the NBA vs. NCAA?

The NBA 3-point line is 23ft 9" at the top of the arc and 22ft in the corners. The NCAA men's line is 22ft 2". The NCAA women's line is 20ft 9".

What is the restricted area in basketball?

The restricted area is a 4ft radius arc under each basket. Defenders inside it cannot draw a charging foul. The NBA introduced it in 1997. The WNBA does not use one.

How many laps around a basketball court equals a mile?

On an NBA or college court, approximately 18.33 laps covers a mile. On a high school court, that rises to roughly 19.7 laps.

What out-of-bounds clearance is needed when building a court?

A minimum of 3–5ft of clearance beyond each boundary line is generally recommended. For a full NBA-sized court, a total slab of approximately 100ft × 60ft is a practical working minimum.