Basketball Court Sizes: Complete Dimensions Guide

Basketball court sizes range from NBA regulation 94x50 feet to youth half courts. This guide compares full court dimensions for NBA, NCAA, FIBA, high school, and youth leagues including three point lines, free throw areas, and key measurements.

Standard Basketball Court Sizes

Basketball courts are measured by length and width. Regulatory standards vary by organization.

Court Type Dimensions (L x W ft) Total Area Three Point Line
NBA Regulation 94 x 50 / 28.7 x 15.2 m 4,700 sq ft 23 ft 9 in corner, 22 ft arc
NCAA College 94 x 50 / 28.7 x 15.2 m 4,700 sq ft 22 ft 1.75 in all around
High School 84 x 50 / 25.6 x 15.2 m 4,200 sq ft 19 ft 9 in all around
FIBA International 91.9 x 49.2 / 28 x 15 m 4,520 sq ft 22 ft 1.75 in (6.75 m arc)
Youth (Junior High) 74 x 42 / 22.6 x 12.8 m 3,108 sq ft Varies, often no three point
Half Court 47 x 50 / 14.3 x 15.2 m 2,350 sq ft One basket, full width

Key Basketball Court Markings

Critical measurements for painted lines and restricted areas on regulation courts.

Court Feature NBA Dimension High School Dimension
Free Throw Line 15 ft from backboard 15 ft from backboard
Key (Lane) Width 16 ft wide 12 ft wide
Key (Lane) Length 19 ft from baseline 19 ft from baseline
Basket Height 10 ft above floor 10 ft above floor
Backboard Size 72 x 42 inches 72 x 42 inches
Rim Diameter 18 inches 18 inches

Court Construction Requirements

Minimum space and clearance needed for safe basketball court construction.

Court Type Playing Area Recommended Total Space
Full NBA Court 94 x 50 feet 110 x 65 feet with 5-8 ft clearance
Full High School 84 x 50 feet 100 x 65 feet with clearance
Half Court 47 x 50 feet 60 x 60 feet minimum
Backyard Half Court 30 x 25 feet minimum 35 x 30 feet for comfort

Visual Size Comparison

Basketball court size comparison from half court to full NBA regulation.

Basketball court size comparison Half Court High School NBA Full

Basketball Court Size Calculator

Find the right basketball court size for your space and use case.

How to size a basketball court for your yard

Measure the usable area, not the lot

Half-court for residential: 30′×30′ minimum for a real half-court; 25′×30′ works for casual play. Full-court NBA/NCAA: 50′×94′. High school: 50′×84′. Add 3–6 ft of out-of-bounds clearance to all dimensions for safety.

Clearance from structures

Most jurisdictions require setbacks from property lines, structures, and overhead utility lines. Even where setbacks aren't legally required, allow at least 24″ from any wall or fence for maintenance access and to keep moisture from damaging both the structure and the new piece.

Anchoring and weight

Court surface choices: asphalt (cheapest, hard on joints), concrete with sealed coating, modular sport tiles (best for body but costly), or PolyTuf paint over either. Hoop is at 10 ft for adults; lower (8 ft, 9 ft) for kids and growing players.

Common mistakes

  • Sizing to the lot dimensions rather than the level usable space.
  • Forgetting setback rules — some require permits even for things that look freestanding.
  • Ignoring sun and wind direction; the right size in the wrong spot becomes unusable in summer or storms.