Basketball Court Dimensions: NBA, NCAA, FIBA and High School (With Diagram Measurements)

Basketball court dimensions change by level of play: NBA and NCAA courts measure 94 ft by 50 ft, FIBA international courts are 28 m by 15 m (about 91.9 x 49.2 ft), and high school (NFHS) courts are 84 ft by 50 ft. Rim height stays at 10 ft across all of these levels. Below you'll find side-by-side tables, half-court and key/lane measurements, and a layout checklist you can use to plan or re-line a court.

Basketball Court Dimensions by Level

The table below compares full-court length, width, and area where the fact sheet specifies it.

How Many Sq Ft Is a Basketball Court?

An NBA or NCAA court covers 4,700 sq ft. A high school court covers 4,200 sq ft. FIBA and junior high courts don't have an officially published square-footage figure in the rulebooks — if you need that number for flooring, paint, or turf estimates, measure your actual court and multiply length by width to get the exact area for your space.

High School Basketball Court Dimensions

High school basketball court dimensions, set by NFHS, are 84 ft long by 50 ft wide, for a total of 4,200 sq ft. That's 10 ft shorter than an NBA or NCAA court, but the same width. Other high school specifications from the fact sheet:

• Rim height: 10 ft, same as NBA, NCAA, and FIBA
• Free-throw lane (the key): 12 ft wide
• Lane length, baseline to free-throw line: 19 ft
• Free-throw line: 15 ft from the face of the backboard
• Three-point line: 19 ft 9 in

Half Court Dimensions

Half court dimensions follow directly from the full-court length, since the width stays the same and the court is split at the midline.

If you're building a home or driveway court, a 30 x 30 ft footprint is a common starting point, scaling up to the full 42 x 50 ft high school half-court size if space allows.

Key Markings and Measurements

Beyond the outer boundary, several markings are consistent across most levels: the backboard is 72 in wide by 42 in tall, the rim's inside diameter is 18 in, and the rim is mounted 6 in from the backboard face with the top of the rim 10 ft from the floor. The center circle at half court is 12 ft in diameter (6 ft radius). The restricted-area arc under the basket is a 4 ft radius from the center of the rim in both NBA and NCAA play.

Free-Throw Lane (the Key) by Level

Three-Point Line Distance by Level

How to Measure and Lay Out a Court

• Confirm your level of play (NBA/NCAA, FIBA, high school, junior high, or youth) and pull the exact dimensions from the tables above before marking anything.
• Start with a flat, level surface, and leave clearance beyond every sideline and baseline — a minimum of 3 ft, ideally 10 ft.
• Mark the two baselines first, at the full court length apart (94 ft for NBA/NCAA, 84 ft for high school).
• Find the midpoint between baselines and mark the half-court line, perpendicular to the sidelines.
• Center the 12 ft-diameter (6 ft radius) center circle on the half-court line.
• From each baseline, measure 19 ft toward center court to mark the free-throw line, then draw the lane lines at the correct width for your level (16 ft for NBA, 12 ft for NCAA/high school).
• Position the backboard so the rim's top sits 10 ft above the floor and the rim front is 6 in from the backboard face; set the free-throw line 15 ft from the backboard face.
• Mark the three-point arc at the distance listed for your level, and add the restricted-area arc (4 ft radius from the rim center) for NBA/NCAA layouts.

Planning Your Space

Before pouring concrete or laying a sport court surface, plan for clearance beyond the painted lines, not just the lines themselves. The recommended minimum is 3 ft of open space beyond every sideline and baseline, with 10 ft being the more comfortable, safer target where players may run out of bounds at speed. For a full-size court (94 x 50 ft for NBA/NCAA, or 84 x 50 ft for high school), factor this clearance into your total lot or gym footprint on all four sides. For half courts and backyard setups (30 x 30 ft up to a full 42 x 50 ft high school half court), the same clearance guidance applies — scale the buffer to whatever space you can realistically dedicate around the playing lines.

Sources

Dimensions and specifications referenced in this guide are drawn from the official rulebooks and standards published by the NBA, WNBA, NCAA, FIBA, and NFHS (National Federation of State High School Associations), which govern professional, college, international, and high school basketball court layouts respectively.

Shop the Gear

Ready to set up or upgrade your court? Browse basketball hoops for a full range of goal systems, in-ground basketball hoops for a permanent home or facility installation, indoor basketball goals built for gyms and fieldhouses, and basketball backboards to replace or upgrade an existing setup.

Frequently asked questions

How many sq ft is a basketball court?

An NBA or NCAA court is 4,700 sq ft (94 x 50 ft). A high school court is 4,200 sq ft (84 x 50 ft). FIBA and junior high courts don't have an officially published square-footage figure.

What are high school basketball court dimensions?

NFHS high school courts measure 84 ft by 50 ft, for a total of 4,200 sq ft, with a 10 ft rim height, same as NBA, NCAA, and FIBA.

What are half court dimensions?

NBA and NCAA half courts are 47 ft x 50 ft. High school half courts are 42 ft x 50 ft. Backyard half courts commonly range from 30 x 30 ft up to the full 42 x 50 ft high school half-court size.

How tall is a basketball hoop?

The rim is 10 ft high at the NBA, NCAA, FIBA, and high school levels. Youth leagues commonly use 8 ft for ages 7-8 and 9 ft for ages 9-11.

How wide is the free-throw lane (the key)?

The lane is 16 ft wide in the NBA and 4.9 m (16 ft) wide under FIBA rules, versus 12 ft wide for NCAA and high school play. Lane length from baseline to free-throw line is 19 ft at the NBA, NCAA, and high school levels.

How far is the three-point line?

It varies by level: NBA is 23 ft 9 in at the top of the arc and 22 ft in the corners; WNBA, NCAA, and FIBA use 22 ft 1.75 in; high school is 19 ft 9 in.

What size is a junior high basketball court?

Junior high and middle school courts are commonly 74 ft by 42 ft, though this size isn't as strictly standardized as NBA, NCAA, FIBA, or high school courts.