TimerNest Home / Online Stopwatch
Free Online Stopwatch
Measure elapsed time with a simple online stopwatch. Start, pause, continue, reset, and record lap times directly in your browser. Useful for workouts, practice, cooking prep, experiments, and everyday tasks.
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How to use the stopwatch
Press Start to begin measuring time. Press Lap to save a split without stopping the stopwatch. Pause to temporarily stop, and Reset to clear the elapsed time and lap list.
Stopwatch for workouts and study
Track an exercise set, a running interval, a reading session, or the time needed to finish a task. Lap times help compare intervals within one session.
Works in your browser
No app or account is required. Keep the page open during use; background browser throttling may affect display updates, though elapsed time is calculated using the system clock.
Stopwatch for running and exercise
Use the stopwatch to time a short run, a walking interval, a set of exercises, or a rest period. Press Lap at a milestone such as completing one circuit or one repetition group. Lap entries let you compare segments while the total elapsed time continues to increase.
Stopwatch for study and productivity
Start the stopwatch when you begin a task and pause it when you stop. Over time, these sessions can help you estimate how long recurring work actually takes. If you are comparing tasks, record each session separately and reset between them.
Understanding elapsed time and laps
The main display shows the total elapsed time. A lap is a snapshot of that total at the moment you press the lap button; it does not stop or reset the stopwatch. The newest lap appears at the top of the list for quick reference during a session.
Browser timing and accuracy
The stopwatch uses your browser’s high-resolution clock to calculate elapsed time rather than simply adding one second for every screen update. That helps it stay close to real elapsed time if a tab briefly becomes inactive. Still, a browser stopwatch is not a certified timing instrument for official competition or laboratory measurements.
Simple ways to use lap times
For running, press Lap at each kilometre or lap marker. For a circuit workout, record each round. For practice or rehearsal, mark each attempt so you can compare the duration of repeated efforts. Use Reset only when you are ready to clear the current session and its saved lap list.
For the clearest results, keep the page open and avoid closing or refreshing the tab during a session. You can pause and resume without losing the accumulated time; resetting clears the current elapsed time and all lap entries.
Frequently asked questions
Is the online stopwatch free?
Yes. You can start and reset it without signing up.
What is a lap time?
A lap records the elapsed time at a point during a run without resetting the overall stopwatch.
Can I use it on my phone?
Yes, the controls adapt to smaller screens and work in modern mobile browsers.