Free, precise online stopwatch
Hundredth-of-a-second precision · unlimited laps
Measure elapsed time to the hundredth of a second with lap tracking, pause and resume. 100% browser-based, no installation or sign-up.
Start the stopwatch
Precise measurement to the hundredth of a second, with unlimited lap tracking.
Examples of measured times
Typical stopwatch display depending on the activity type, in HH:MM:SS.cs format.
Which precision to choose
Technical characteristics of the stopwatch depending on your needs.
Hundredth of a second, sufficient for sport and productivity.
For fine measurements: science, debugging.
Record as many split times as needed.
Works over very long durations with no drift.
How to use the stopwatch
Start the stopwatch
Click Start to begin measuring to the hundredth of a second.
Record your laps
Click Lap to add a split time without interrupting the measurement.
Pause or reset
Pause or reset to zero at any time.
What this stopwatch is for
Sport & training
Sprints, HIIT sets, laps, breathing, meditation.
Productivity
Pomodoro sessions, time spent on a task, focus.
Cooking & everyday life
Recipes, games, exercises, or any timed activity.
Frequently asked questions — Stopwatch
Yes, precision is around the hundredth of a second (10 ms), based on the browser's internal clock.
The stopwatch keeps running. The calculation is based on absolute time, not on the display refresh rate.
Laps stay displayed as long as the tab is open. Write them down if you want to keep them after closing.
No limit — you can record as many laps and split times as needed during your training or competition session.
Other stopwatches available
Digital stopwatch
Digital display of elapsed time to the hundredth of a second.
Simple stopwatch
Start, pause, reset: the essentials.
Lap stopwatch
Record each lap with a single click.
Split times
Track split times during a race.
High precision
Millisecond display for detailed measurements.
Multi-person
Time several participants in parallel.