Stopwatch tools · Together & independently
Multiple Stopwatches
A few things happening. One clear view.
Ready when you are.
Reset this board and its results?
Session records
How to use the multiple stopwatches
Add a name for each athlete, experiment, or activity. Start any watch separately, or start all ready watches at the same instant. Each card has its own pause, resume, lap and read-time controls.
Start all ready watches starts only watches that have never started. It leaves paused and running watches alone. Pause all captures one shared timestamp. Use Reset board after exporting when you want a fresh set. Up to eight watches and 500 total lap marks keep the board lightweight.
How is this different from the race stopwatch?
These watches can start and pause independently and collect repeated laps. The race stopwatch has one common start and a finish button for each participant, producing an ordered finish list.
How accurate is the stopwatch?
The display can show hundredths of a second, but human reaction and browser input latency affect a manual measurement. Live timing uses a monotonic clock, so changing the device time does not change an open session. After a refresh, recovery uses saved device timestamps. Device sleep and a changed clock can affect that recovery. Keep this page and device awake for dependable timing.
Where are my results saved?
Only in this browser on this device, with no account required. Use one tab per tool to avoid overwriting the same saved session. Export CSV before clearing local settings. Each session can hold up to 500 marks and seven days of active elapsed time. Live updates stop while paused; no stopwatch readings are sent to our server.