Shot Clock Violation Tracker

Live basketball possession countdown — 24s NBA/WNBA or 30s FIBA/college, with the 14-second offensive-rebound reset

Manual Tracker: This is a manual courtside/practice aid, not connected to any live game feed — start, pause, and reset it yourself in sync with the actual possession.
Format
24
seconds remaining

The shot clock is a countdown timer that forces the team in possession to attempt a shot within a fixed window, or lose the ball for a "shot clock violation." The NBA uses a 24-second shot clock; FIBA (international play) and most college and domestic leagues use 30 seconds — WNBA uses 24 seconds, matching the NBA.

The clock resets to the full duration whenever possession changes (a made basket, a defensive rebound followed by a turnover, a steal, etc.), and resets to a shorter window — 14 seconds under both NBA and FIBA rules — after an offensive rebound, since the offense already had a full possession's worth of time before the rebound occurred.

NBA / WNBA shot clock
24 seconds
FIBA / most other leagues
30 seconds
Offensive rebound reset (all)
14 seconds
Introduced (NBA)
1954
1
Format: Choose NBA/WNBA (24s) or FIBA/College (30s) — sets the full countdown duration.
2
Start / Pause: Start the countdown at the beginning of a possession; pause on a whistle or dead ball.
3
Reset to 14: Use after an offensive rebound — resets the clock to 14 seconds under both NBA and FIBA rules.
4
Reset to full: Use whenever possession changes — resets to the full 24s or 30s duration.
Source: NBA Official Rules 2023–24; FIBA Official Basketball Rules 2023; NCAA Men's Basketball Rules

Before the shot clock was introduced (the NBA adopted 24 seconds in 1954), teams with a lead could simply hold the ball indefinitely, turning close games into tedious stalling contests — the shot clock is directly credited with saving the NBA as a viable professional sport by forcing continuous, watchable action.

The specific number chosen wasn't arbitrary: the NBA's 24 seconds was calculated by dividing a 48-minute game by the average number of shots (roughly 60 per team) taken in games at the time, producing a number that matched the sport's actual pace rather than an artificial constraint on it.

If the ball doesn't leave the shooter's hand before the clock hits zero (and, for a made basket, actually touches the rim or goes in), it's a shot clock violation — the offense immediately loses possession and the ball is turned over to the other team, typically via an inbound pass from the nearest sideline.

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