Stopwatch tools · Work & practice
Task Stopwatch
See where the time went. Stay with one thing.
Ready when you are.
Reset this board and its results?
Session records
How to use the task stopwatch
Add your tasks, then press Start on the one you are working on. Starting another task pauses the previous one at the same instant. Pause when you take a break, and resume any task when you return.
The board shows each task's active time and its share of all tracked time. Task switching records a completed work block, giving you a reusable activity log. Breaks do not count. These are current-session records stored in this browser, not account-synced timesheets or automatic activity monitoring.
Can two tasks count time at once?
No. This tool deliberately tracks one active task at a time. For simultaneous experiments or activities, use Multiple Stopwatches. Export task totals and work blocks before resetting the board.
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.