Online Stopwatch
Accurate, distraction-free timing
This stopwatch measures elapsed time from the system clock rather than counting intervals, so it stays accurate even when the browser tab is throttled in the background — stop it after ten real minutes and it will read ten minutes. Lap times record split moments without interrupting the count, and the display is sized to be readable from across a room or sports field.
Useful for timed reading fluency checks, science experiments, PE sprints and debate rebuttals. For counting down to zero instead, switch to the countdown timer.
Frequently asked questions
Is the stopwatch free?
Yes — it's completely free, with no sign-up and nothing to install. It runs entirely in your browser and is free for any school or home use.
Do I need an account or internet to use it?
No account is ever required. The tool loads in your browser and keeps working even if your connection drops mid-lesson; any list you enter is saved locally on your own device, not on our servers.