Sports Timer
Set the period length, number of periods, and intermission, then keep the game clock on screen.
Sports Timer
Ready
Local tab-only timer. The clock uses a monotonic deadline to compensate for tab delays.
A QUICK WALKTHROUGH
How to use this tool
- Choose a period length, period count, and intermission.
- Start, pause, or add and subtract five seconds from the clock.
- Move between periods and reset the game when needed.
Game clock
The timer stays in this browser tab. It uses performance.now() deadlines rather than adding one second for every interval tick.
Local session only
No score, game state, or settings are uploaded or saved. This is a timekeeper, not an official scoring system.
GOOD TO KNOW
Common questions
Can I adjust the clock while it runs?
Yes. Add or subtract five seconds while paused or running; the adjustment is clamped at zero.
What happens at zero?
The clock pauses and selects the next phase or reports completion according to the period and break settings. Start runs the selected phase; Next period advances another phase.
Does it work after closing the page?
No. Keep the page open for the local game clock.