Basketball Court Size Guide: Exact Dimensions from NBA to Backyard Courts

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 measure 91ft 10" × 49ft 3" (28m × 15m). Rim height stays fixed at 10 feet across all senior levels.

Whether you are looking at professional play, college competition, or planning a backyard build, understanding basketball court size starts with knowing which governing body sets the rules.

Basketball Court Dimensions at Every Level

All the numbers you need in one place — because most searches around basketball court size are really looking for this comparison:

Level	Length (ft)	Width (ft)	Length (m)	Width (m)	Key Width	3-Point Line	Rim Height
NBA	94	50	28.65	15.24	16 ft	23ft 9" (22ft corners)	10 ft
WNBA	94	50	28.65	15.24	16 ft	22ft 1.75"	10 ft
NCAA Men	94	50	28.65	15.24	12 ft	22ft 1.75"	10 ft
NCAA Women	94	50	28.65	15.24	12 ft	20ft 9"	10 ft
FIBA / Olympic	91ft 10"	49ft 3"	28.00	15.00	15ft 9"	22ft 1.75"	10 ft
High School	84	50	25.60	15.24	12 ft	19ft 9"	10 ft
Junior High	74–84	50	22.56–25.60	15.24	12 ft	19ft 9"	10 ft
4th–5th Grade	74	50	22.56	15.24	12 ft	Varies	8–10 ft
2nd–3rd Grade	50	42	15.24	12.80	Varies	None	6–8 ft

One important constant: rim height remains 10 feet across every senior format — NBA, WNBA, NCAA, FIBA, and high school. That uniformity is one of the rare fixed standards across all governing bodies.

Why Court Dimensions Vary Across Levels of Play

This is a question that rarely gets a direct answer. The short explanation: different governing bodies apply different standards, and court dimensions are calibrated to match the physical demands and tactical needs of players at each tier.

The NBA and NCAA share the same overall footprint — 94ft × 50ft — but the NBA uses a wider key at 16 feet compared to the NCAA's 12 feet. The wider lane is designed to account for the size and strength of professional players competing for post position. A broader paint area forces bigger players to work harder for interior advantage.

FIBA courts run approximately 2 feet shorter and 9 inches narrower than NBA courts. This traces back to the historical standardisation of European indoor sports facilities, where venues were constructed before NBA measurements became the global benchmark. In practical terms, players transitioning between leagues adapt to the size difference quickly.

High school courts are 10 feet shorter than professional and college venues — 84ft versus 94ft because the game at that level does not require the spacing that professional offensive sets and fast breaks demand. Youth courts scale further in both length and rim height, keeping the game proportionate to younger players' physical development.

The 3-point arc is where the most visible differences emerge between levels. Distance has been extended progressively at higher tiers to reward elite perimeter shooting and create more spacing around the basket.

Official Measurements for Each Level of Play

NBA Court Measurements

The NBA court spans 94 feet in length and 50 feet in width — 28.65m × 15.24m in metric.

Measurement	Feet	Yards	Meters
Length	94 ft	31.33 yd	28.65 m
Width	50 ft	16.67 yd	15.24 m

Additional NBA court specifications:

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

The NBA does not enforce a minimum buffer zone between the court boundary and the nearest row of seats — clearance varies by arena.

WNBA Court Measurements

WNBA courts use the same full-court footprint as the NBA — 94ft × 50ft — with a matching 16ft key. The primary distinction is the 3-point line, which sits at 22ft 1.75" rather than the NBA's 23ft 9", aligning it with FIBA and NCAA men's standards.

NCAA Basketball Court Specifications

NCAA courts match NBA dimensions overall — 94ft × 50ft — but differ in two significant ways:

Key width is 12ft for both men's and women's programs (versus 16ft in the NBA)
3-point line distances are not uniform across men's and women's play

The men's 3-point arc was extended to 22ft 1.75" beginning in the 2020–21 season, bringing it in line with FIBA international standards for the first time. Prior to that change, it sat at 20ft 9". Women's NCAA play retains the 20ft 9" distance.

FIBA and Olympic Court Specifications

FIBA governs international competition including the Olympics, alongside domestic leagues throughout Europe, Australia, and other regions.

Measurement	Feet	Meters
Length	91ft 10"	28.00 m
Width	49ft 3"	15.00 m
Key Width	15ft 9"	4.80 m
3-Point Arc	22ft 1.75"	6.75 m

For non-Olympic domestic competition, FIBA permits the following flexibility:

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

High School Court Specifications

High school courts in the United States fall under NFHS (National Federation of State High School Associations) guidelines and measure:

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

Junior high venues typically follow the same 84ft × 50ft layout, though some state associations permit courts as short as 74ft at that level.

Youth Court Sizing

Age Group	Length (ft)	Width (ft)
4th–5th Grade	74	50
2nd–3rd Grade	50	42

At youth levels, the objective is not a compressed professional game — it is keeping spatial demands proportionate so younger players can develop fundamental skills without being overwhelmed by court length or shooting distance. Rim heights drop accordingly, commonly to 8ft or 6ft for the youngest age groups.

Court Markings and Lines Explained

Grasping basketball court size fully requires understanding the internal markings. Each line serves a defined purpose, and several differ meaningfully between levels.

Sidelines and Baselines

The sidelines extend the full length of the court. The baselines — also referred to as endlines — run behind each basket. On NBA and NCAA courts, sidelines measure 94ft and baselines measure 50ft. These four boundary lines define the active playing surface. The ball is immediately out of play when it crosses any of them.

The Key, Free Throw Lane, and Paint Area

The key is the rectangular zone stretching from the baseline to the free throw line below each basket. Courts typically paint this area in a contrasting colour — which is how the term "the paint" originated.

Level	Key Width	Baseline to Free Throw Line
NBA	16 ft (4.88m)	19 ft (5.79m)
FIBA	15ft 9" (4.80m)	19 ft
NCAA / High School	12 ft (3.66m)	19 ft

An often-overlooked implication: key dimensions directly influence defensive strategy. NBA defenders may remain in the key for a maximum of 3 seconds unless they are actively guarding an opponent. This rule does not exist in NCAA or FIBA play, allowing defenders to occupy the paint for extended periods — which opens up distinct tactical approaches at each level.

The Free Throw Line

The free throw line sits 15 feet from the front face of the backboard at every level of senior play NBA, WNBA, NCAA, FIBA, and high school. The free throw circle carries a 12ft diameter in both NBA and NCAA competition.

The 3-Point Arc

The 3-point arc is the boundary beyond which a successful field goal counts for three points. Its distance from the basket changes noticeably across levels:

Level	3-Point Line Distance
NBA	23ft 9" (top of arc) / 22ft (corners)
WNBA	22ft 1.75"
NCAA Men	22ft 1.75" (from 2020–21)
NCAA Women	20ft 9"
FIBA / Olympic	22ft 1.75"
High School	19ft 9"

The NBA temporarily shortened its 3-point distance to a flat 22ft between 1994 and 1997 in an effort to lift scoring during a period of declining offensive output. The corner three remains one of the most strategically important positions in professional basketball because it is the shortest legal 3-point attempt available — a reality underscored by the modern era of perimeter shooting.

As reported by Bloomberg, Stephen Curry became the first player in NBA history to reach 3,000 career 3-pointers, a milestone that illustrates just how central long-range shooting from positions like the corner has become to the professional game.

The Center Circle

The center circle sits at the midpoint of the court and is used exclusively for the opening tip-off. Its diameter is 12ft in NBA and NCAA play and 11ft 10" under FIBA rules. A smaller inner circle measuring 4ft in diameter is also visible inside it on most professional courts.

The No-Charge Arc

Positioned directly below each basket, the no-charge arc — also called the restricted area — is a short curved line inside the key. Any defender standing within this zone cannot draw a charging foul from an offensive player driving to the basket.

Level	Restricted Area Radius
NBA	4ft (1.22m)
NCAA Men	4ft (1.22m)
FIBA	4ft 1" (1.25m)
WNBA	Not used
NCAA Women	Not used

The rule was introduced in the NBA in 1997 to prevent defenders from deliberately positioning themselves under the basket to manufacture charging calls. The marking is small but has a measurable impact on how drives and collisions near the hoop are officiated.

Half-Court Basketball Dimensions

Half-court play is the standard format when fewer than ten players are available, or for recreational and pickup games. Dimensions are simply half the full court taken lengthwise:

Level	Baseline (Width)	Sideline (Half-Length)
NBA / NCAA	50 ft (15.24m)	47 ft (14.33m)
High School	50 ft (15.24m)	42 ft (12.80m)

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

Backyard and Recreational Court Sizing

Regulation dimensions are rarely achievable for home installations. Most backyard courts are designed around available space and budget constraints rather than official specifications.

The NBA has grown into a league generating over $12 billion in combined team revenues per season, according to data from Statista a scale of investment that makes the contrast with recreational court building all the more striking, where most builds work within a few thousand dollars and a 30ft footprint.

Choosing a Practical Size

Court Type	Dimensions	Best Suited For
Minimum functional	16ft × 20ft	Shooting practice only
Popular residential half-court	30ft × 30ft	Casual play, small groups
Full backyard court	46ft × 78ft	Families, multiple players

The 30 × 30ft half-court is the most widely chosen residential format. It accommodates a 3-point arc at high school distance and provides enough room beyond the arc for genuine gameplay without requiring an oversized concrete slab.

Backboard Overhang

Backboard overhang refers to the distance between the baseline and the front face of the backboard. This measurement determines how much usable space exists behind the basket — which matters for player safety.

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

Playing Surface Materials

Indoor courts: Professional and college facilities use hard maple — also called sugar maple or rock maple. It is chosen for its hardness, tight grain structure, and durability across a full playing season.

The feel of a maple floor differs noticeably from other materials, and most experienced players can identify it immediately.Outdoor courts: Asphalt and concrete are the most common materials.

Both are low-maintenance and long-lasting, though they place more stress on joints over extended use. Modular interlocking polypropylene tiles are growing in popularity for residential installations simpler to install, easier on the body, and available in pre-configured regulation layouts.

Space Planning Notes

The court boundary is not the same as the surface area required for construction. Allow at minimum 2–3 feet of clearance beyond every sideline and baseline for safe out-of-bounds movement. A 30 × 30ft court should realistically be poured on a slab of at least 34 × 34ft.

Summary

Basketball court size differs by governing body and competition level. NBA and NCAA courts measure 94 × 50ft, FIBA courts sit at 28 × 15m, and high school courts run 84 × 50ft. Key width, the 3-point arc, and the no-charge zone all vary meaningfully between levels.

For backyard installations, a 30 × 30ft half-court is the most practical and cost-effective choice for most households.

Frequently Asked Questions

What is the standard basketball court size in feet?

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

What is the rim height across all levels of play?

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

How many laps around a basketball court equals one mile?

On an NBA or NCAA court, approximately 18.3 laps cover one mile. On an 84ft high school court, that number increases to roughly 19.7 laps.

Why is the NBA key wider than the college version?

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

What is a practical size for a backyard basketball court?

A 30 × 30ft half-court is the most realistic and widely used choice for residential builds. It fits a high school-distance 3-point line and provides adequate playing room without requiring a large or expensive slab installation.

Basketball Court Size: Complete Dimensions Guide for Every Level of Play