Basketball Court Dimensions & Marking Guide

Under official FIBA international rules, a regulation basketball court measures 28.00 meters long by 15.00 meters wide (91′ 10″ × 49′ 2.5″), with a required 2.0-meter unobstructed runoff buffer on all four sides.

FIBA Regulatory Court Specifications

TOTAL LENGTH28.00 m (91′ 10″)
TOTAL WIDTH15.00 m (49′ 2.5″)
SQUARE-OFF DIAGONAL31.765 m (104′ 3″)
3-POINT RADIUS6.75 m (22′ 1.75″)
FREE THROW DISTANCE5.80 m (from baseline)
RIM HEIGHT3.05 m (10′ 0″)
CENTER CIRCLE RADIUS1.80 m (3.60m diameter)
OVERHEAD CLEARANCE7.00 m (23′ 0″) Min

FIBA Regulation Basketball Court Setting-Out Blueprint (28m × 15m)

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FIBA regulation basketball court diagram showing 28m length, 15m width, 6.75m 3-point arc, and 31.765m diagonal check
Figure 1: Official FIBA basketball court blueprint. Features the 31.765m corner-squaring diagonal check and 6.75m 3-point arcs.

Step-by-Step Basketball Court Striping Guide (With Diagrams)

28.00m × 15.00m COURT BOX 2.0m RUNOFF ON ALL 4 SIDES • 7.0m CEILING HEIGHT

Step 1 — Boundary Envelope & Safety Runoff (32m × 19m)

FIBA mandates a minimum 2.00-meter safety runoff on all four sides (32.0m × 19.0m overall pad envelope) clear of team benches and tables. Verify a minimum 7.00m vertical clearance to ceiling trusses and light fixtures.

Pad Clearance: 32.0m × 19.0m Runoff Buffer: 2.0m perimeter Ceiling Clearance: 7.0m min
CORNER 1 (0.00m) CORNER 2 (15.00m) BASELINE 1 = 15.00m

Step 2 — Establish Baseline 1 (Corners 1 & 2 = 15.00m)

Drive Corner 1 stake, measure along the baseline exactly 15.00 meters (49′ 2.5″), and drive Corner 2 stake. Snap a crisp chalk baseline between both corners.

Baseline Width: 15.00m (49′ 2.5″) Line Width: 5.0 cm (2 in)
CORNER 4 (TRUE 90°) 28.00m SIDELINE 31.765m DIAGONAL

Step 3 — The 31.765m Pythagorean Diagonal Lock (Corner 4)

Pull Tape 1 (28.00m) along the sideline from Corner 1, and Tape 2 (31.765m diagonal) from Corner 2. Where both marks cross under tension, drive Corner 4 at a guaranteed 90.00° angle.

Sideline: 28.00m (91′ 10″) Diagonal: 31.765m (104′ 3″) Formula: √(28² + 15²) = 31.765m
BOTH DIAGS = 31.765m

Step 4 — Complete 28m × 15m Box & Verify Diagonals

Repeat triangulation from Corner 2 (pulling 28.00m) and Corner 1 (pulling 31.765m) to set Corner 3. Cross-check both full diagonals: both must equal 31.765 meters (104′ 3″) within 5mm.

Opposite Baseline: 15.00m Cross-Check: 31.765m both ways
R=1.80m CENTER LINE AT 14.00m

Step 5 — Center Line (14.00m) & Center Circle (R=1.80m)

Measure 14.00 meters along each sideline to snap the center dividing line. Anchor a steel trammel wire at mid-court (7.50m from sidelines) and swing a 1.80m radius circle (3.60m diameter).

Half-Court Line: 14.00m Center Circle Radius: 1.80m (3.60m dia)
3-PT ARC (6.75m) 4.90m × 5.80m KEY

Step 6 — Free Throw Lane (5.80m) & 3-Point Arc (6.75m)

Measure 5.80m from the inside baseline for the 3.60m free throw line (4.90m wide rectangular key). Anchor the trammel wire plumb below the center of the hoop (1.575m from baseline) and swing the 6.75m radius 3-point arc, extending parallel to the sidelines 0.90m inward.

Key Size: 4.90m W × 5.80m L 3-Point Radius: 6.75m (22′ 1.75″) Sideline Inset: 0.90m (35.4″)

FIBA BASKETBALL COURT (28m × 15m) — FIELD CREW JOB SHEET

Standard: FIBA Official Rules | Envelope: 32m × 19m Pad | Date: __________________

Survey Parameter Exact Setting Measurement Physical Field Instructions
Court Boundaries 28.00m × 15.00m (91′ 10″ × 49′ 2.5″) Outer edge to outer edge.
Corner Diagonal Check 31.765m (104′ 3″) Pythagorean corner-to-corner square-off.
3-Point Radius 6.75m (22′ 1.75″) Measured from plumb point directly below hoop center.
Free Throw Line 5.80m from baseline Line is 3.60m long; key is 4.90m wide.

Field Toolkit Checklist

☐ 2× 30m / 100ft Steel Tapes    ☐ Trammel Wire    ☐ Plumb Bob    ☐ 5cm White Court Paint

Regulatory Comparison: FIBA vs. NBA vs. NCAA

Specification FIBA (International) NBA NCAA (College)
Court Boundaries 28.00m × 15.00m 94′ 0″ × 50′ 0″ (28.65m × 15.24m) 94′ 0″ × 50′ 0″ (28.65m × 15.24m)
3-Point Arc Radius 6.75 m (22′ 1.75″) 23′ 9″ (7.24 m) / 22′ corner 22′ 1.75″ (6.75 m)
Key / Free Throw Lane Width 4.90 m rectangular 16′ 0″ (4.88 m) 12′ 0″ (3.66 m)
Restricted Area Arc 1.25 m radius 4′ 0″ (1.22 m) radius 4′ 0″ (1.22 m) radius
Line Width 5.0 cm (2.0 in) 2.0 in (5.08 cm) 2.0 in (5.08 cm)

Other Sports Ground Layout Guides:

Check our Volleyball Court (18m × 9m), view the Tennis Court (85′ 11″ Diag), or explore the Master Court Directory.