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The free online basketball shot clock for practice and games
ProShotClock is a free, full-screen basketball shot clock you can run in any web browser — no download, no sign-up. Use it for individual workouts, team drills, scrimmages, pickup games, or as a backup clock when the gym's hardware is down. The clock runs a 24-second NBA/FIBA timer with a quick 14-second reset and supports custom times, an end-of-clock buzzer, and keyboard shortcuts for live use. Below you'll find how the shot clock works at every level of basketball.
Shot clock times by league
Different leagues use different shot clock lengths and reset rules. Here is how they compare:
| League / level | Shot clock | Reset after offensive rebound |
|---|---|---|
| NBA | 24 seconds | 14 seconds |
| WNBA | 24 seconds | 14 seconds |
| FIBA (international) | 24 seconds | 14 seconds |
| NCAA — men's & women's | 30 seconds | 20 seconds |
| U.S. high school (NFHS) | 35 seconds (state option) | No standard partial reset |
| FIBA 3x3 (3v3, half-court) | 12 seconds | No partial reset — fresh 12s on a new possession |
Dedicated guides with the clock pre-set: the 30-second NCAA shot clock and the 3x3 (12-second) shot clock.
How to use this shot clock
- Start / stop the clock with the button or the Space bar.
- Reset to either preset with the two reset buttons, or the → and ← keys.
- Choose your presets in Settings — NBA/FIBA (24 / 14), NCAA (30 / 20), high school (35) or FIBA 3x3 (12) — and remap the keyboard shortcuts. Your choices are saved in the browser.
- Set a custom time (0.1–60 seconds) for specialised drills, such as a 5-second decision rule.
- Open the external display to mirror the clock full-screen on a second monitor or projector at the scorer's table — it stays in sync automatically.
- Under 5 seconds the display switches to tenths of a second and turns red for the final stretch.
- When the clock hits zero, the buzzer sounds — just like the real end-of-possession horn.
- Use the ↑ key to blank the display between possessions.
What is a shot clock in basketball?
A shot clock is a countdown timer that limits how long the offensive team can hold the ball before attempting a shot that hits the rim. If the clock expires before a legal shot attempt, it is a shot-clock violation and the ball is awarded to the defence. The rule was introduced in the NBA in 1954 to speed up play and prevent teams from stalling, and it is now used at virtually every level of organised basketball.
The 3x3 (3v3) basketball shot clock
FIBA 3x3 — the half-court, three-a-side game that became an Olympic sport at Tokyo 2020 — runs on a 12-second shot clock, exactly half of the 24 seconds used in the 5-on-5 game. The shorter clock keeps 3x3 relentless: teams play to 21 points or the highest score after 10 minutes, scoring one point from inside the arc and two from beyond it, with three players a side plus one substitute.
After a change of possession a team must clear the ball behind the two-point arc before it can score, and the 12-second clock starts when the team gains control. Unlike 5-on-5 there is no separate partial reset (no 14-second equivalent) — a new possession simply gets a fresh 12 seconds. To run a 3x3 clock here, open Settings and pick the FIBA 3x3 · 12 preset, or use the dedicated 3x3 shot clock page, which loads pre-set to 12 seconds.
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As an Amazon Associate, ProShotClock may earn from qualifying purchases. It costs you nothing extra.
Frequently asked questions
How long is the shot clock in basketball?
The shot clock is 24 seconds in the NBA, WNBA and FIBA international play, 30 seconds in NCAA college basketball (men's and women's), and 35 seconds in U.S. high schools that have adopted the NFHS shot-clock rule.
What is the 14-second shot clock reset?
In the NBA, WNBA and FIBA the shot clock resets to 14 seconds instead of a full 24 after an offensive rebound, and after certain defensive fouls or violations when the offense keeps possession in the frontcourt.
Does the NCAA shot clock reset to 20 seconds?
Yes. In NCAA men's and women's basketball the 30-second shot clock resets to 20 seconds after an offensive rebound in the frontcourt, a rule in place since the 2018-19 (men) and 2017-18 (women) seasons.
Do high school basketball games use a shot clock?
It varies by state. Beginning with the 2022-23 season the NFHS allows individual state associations to adopt a 35-second shot clock. A growing number of states use it, while others still play without one.
How long is the shot clock in 3x3 (3v3) basketball?
FIBA 3x3 basketball uses a 12-second shot clock, exactly half of the 24-second clock in the 5-on-5 game — a pace that fits its half-court, single-basket format. Unlike 5x5 there is no separate partial reset like the 14-second reset; a team gets a fresh 12 seconds when it gains a new possession. Pick the "FIBA 3x3 · 12" preset in Settings to use it here.
Is this online shot clock free?
Yes. ProShotClock is completely free to use in any web browser, with no sign-up and no download required.
Can I use it for practice and real games?
Yes. It works for individual practice, team drills, scrimmages and casual games. Use the resets, custom times, keyboard shortcuts and end-of-clock buzzer to mirror real game timing.
What keyboard shortcuts does the shot clock support?
Press Space to start or stop, the right arrow → to reset to 24 seconds, the left arrow ← to reset to 14 seconds, and the up arrow ↑ to blank the display.