Area | NBA | FIBA | WNBA | NCAA men[3][a] | NCAA women[4] | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Imperial | Metric | Imperial | Metric | Imperial | Metric | Imperial | Metric | Imperial | Metric | ||
Court length | 94 ft | 28.65 m | 91.86 ft | 28 m | Same as NBA | ||||||
Court width | 50 ft | 15.24 m | 49.21 ft | 15 m | Same as NBA | ||||||
Rim height | 10 ft | 3.05 m | Same as NBA | ||||||||
No Charge Zone arc | 4 ft | 1.22 m | 4.10 ft | 1.25 m | Same as NBA | ||||||
Center circle diameter | 12 ft | 3.66 m | 11.81 ft | 3.6 m | Same as NBA | ||||||
3-point line distance from the basket | 23.75 ft 22 ft in corner[b] | 7.24 m 6.70 m in corner[b] | 22.15 ft 21.65 ft in corner[c] | 6.75 m 6.60 m in corner[c] | Main arc same as FIBA Corners same as NBA | Same as FIBA[d] | 20.75 ft[e] | 6.32 m[e] | |||
Key (shaded lane or restricted area) width | 16 ft | 4.88 m | 16.08 ft | 4.9 m | Same as NBA | 12 ft | 3.66 m | Same as NCAA men | |||
Free-throw line distance from point on the floor directly below the backboard | 15 ft | 4.57 m | 15.09 ft | 4.6 m | Same as NBA |
In the 1997-1998 season, NBA added the “no charge zone” or the “restricted area”. This is the portion of the key, denoted by an arc in the painted area that is positioned four feet from the basket. The arc is important because a defending player can not force a charging foul within this area. It was designed to provide benefit offensive post-up player like [Shaquille] O’Neal, players who drive to the basket and limit collisions.
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