Stopwatch

Simple stopwatch with lap and split times.

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About this Stopwatch

Stopwatch measures elapsed time with lap and split marks for workouts, usability tests, classroom drills, and process timing. Coaches record intervals; developers time reproducing bugs; freelancers bill discovery calls roughly before formal tracking. Start, mark laps as milestones pass, pause if needed, then reset for the next trial. Timing is client-side in your browser session. For countdown-to-a-deadline workflows use the countdown timer instead, and for recurring focus cadence prefer the pomodoro timer. Keep the tab active if you rely on precise lap notification sounds. Use consistent start cues when timing usability tasks across participants. Record environmental notes beside lap times for later analysis. Calibrate expectations—human reaction lag affects sub-second claims. Keep iterating with this stopwatch workflow until the output matches your checklist.

How to use

1Click Start to begin elapsed timing.
2Use Lap/Split to record intermediate marks.
3Pause when the timed activity stops.
4Review lap times for comparisons between trials.
5Reset before starting a fresh run.

About the Free Stopwatch

Our free stopwatch lets you simple stopwatch with lap and split times. Everything runs locally in your browser — no account, no upload to servers, and no waiting.

Whether you searched for "stopwatch" or need a reliable time & productivity utility, Pinnacle Toolbox delivers instant results. Join thousands of users who prefer privacy-first tools that work on any device.

Part of our free time & productivity tools collection, this tool is designed for speed and simplicity. Open it, paste or upload your input, and get results immediately.

Stopwatch Features

100% free with no hidden limits
Runs entirely in your browser — data stays private
No login, sign-up, or email required
Works on desktop, tablet, and mobile
Instant processing with no server round-trip

When to Use Stopwatch

Running focused Pomodoro work sessions
Scheduling meetings across remote team timezones
Converting Unix timestamps from server logs
Setting countdown timers for presentations or cooking

Frequently asked questions

What is the difference between lap and split?

Interfaces vary; laps often show times between marks while splits may show cumulative times—read the on-screen labels.

How precise is a browser stopwatch?

Good for human-scale activities; not a substitute for lab-grade instrumentation.

Can I export lap lists?

Copy visible lap times into a notes doc or spreadsheet if export is not built in.

Will locking my phone affect timing?

Mobile browser backgrounding can pause or drift timers—test on your device.

Is this for countdowns?

No—this counts up. Use the countdown timer for time remaining.

Pomodoro Timer

Focus timer with work sessions and breaks.

Countdown Timer

Set a countdown timer with hours, minutes, and seconds.

Unix Timestamp Converter

Convert Unix timestamps to dates and vice versa.

Timezone Converter

Convert times across multiple timezones.