A full basketball court is 94 × 50 feet at NBA and college level, and 84 × 50 feet for high school. The rim is always 10 feet. Backyard courts scale down cleanly — here's every number.
Dimensions by level
| Level | Court | 3-point line |
|---|---|---|
| NBA | 94' × 50' | 23'9" (22' corners) |
| NCAA | 94' × 50' | 22'1.75" |
| High school | 84' × 50' | 19'9" |
| Backyard full | 74'–94' × 42'–50' | your call |
| Backyard half | 30'×30' to 50'×47' | 19'9" typical |
Rim height is 10 feet at every level. The free-throw line sits 15 feet from the backboard; the key is 16 feet wide (12 feet in high school).
Building one outside
Most residential builds are half-courts: a 30' × 30' pad plays fine, 35' × 40' gives real three-point room. Surface it like a court, not a driveway — see the basketball coating guide and backyard basketball court guide for systems and costs, and stack pickleball lines on the same pad if you want both games (how that works).