Stopwatch
Online stopwatch with lap times.
Timing presentations, workouts, cooking steps, and benchmark runs requires a reliable stopwatch without installing an app. Utilitoo's Stopwatch offers start, stop, lap, and reset controls with centisecond precision, all running directly in your browser tab.
Coaches recording sprint intervals, speakers rehearsing talk duration, and developers benchmarking UI interactions all need quick lap recording without reaching for a phone. Unlimited laps let you capture segment times during a single session.
Click Start to begin timing, Lap to record intermediate marks, and Stop to pause. Reset clears the timer and lap list for a fresh session. Pair with Time Duration Calculator when computing hours between two clock times, or Countdown Timer for deadline tracking.
The stopwatch uses high-resolution browser timers on Utilitoo. No timing data is uploaded or stored on any server. Free, responsive, and privacy-first for athletes, presenters, and anyone who needs precise elapsed-time measurement.
Stopwatch provides start, stop, reset, and lap controls in the browser. It is built for short interactive timing rather than calendar scheduling - use Countdown Timer when you need a target end time instead of measuring elapsed duration.
Common use cases
- Timing coding kata, interview exercises, or meeting speaking slots.
- Measuring lap splits for workouts when a dedicated sports watch is unavailable.
- Kitchen or lab timing that needs start/stop without installing an app.
- Recording how long a manual QA script takes across repeated runs.
- Demo timers during workshops where everyone shares the same browser tool.
Tips & common mistakes
Background tabs may throttle timers on mobile browsers - keep the stopwatch tab visible for accurate long runs. Use laps when you need splits, and note results elsewhere because Utilitoo does not persist timing history to a server. Pair with Time Duration Calculator when converting elapsed time into hours and minutes for reports. Write down final times immediately if you need them in a report. For event countdowns to a fixed clock time, Countdown Timer is the better tool. Meeting Planner helps when the timing problem is timezone overlap instead of elapsed seconds.
Common errors
- Timer jumps after the tab slept - some browsers pause background timers; keep the tab active.
- Lost lap list after refresh - export or write down splits if you need a permanent record.
How to use
- Click Start.
- Record laps.
- Stop when done.
Frequently Asked Questions
How accurate is the online stopwatch?▼
Utilitoo uses high-resolution browser timers with centisecond display precision.
Can I record lap times?▼
Yes. Click Lap while running to capture unlimited lap marks with timestamps.
Does the stopwatch work on mobile?▼
Yes. The stopwatch works in mobile browsers, though background tabs may pause on some devices.
Is there a limit on laps?▼
No. Record as many laps as you need during a session.
Is timing data stored on a server?▼
No. All stopwatch operation runs locally in your browser.
Related Tools
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