Online Stopwatch
Time anything to the centisecond, record laps, and spot your fastest and slowest splits at a glance. No installs, no accounts.
A precise stopwatch, instantly
Whether you're timing laps at the track, a cooking step, a speech rehearsal or a science experiment, this stopwatch gives you clean, accurate timing with no setup. Record as many laps as you like and the tool highlights your best and worst splits so patterns jump out.
How to use it
- Press Start to begin timing.
- Tap Lap to record a split without stopping the clock.
- Use Stop and Resume to pause, or Reset to clear everything.
Handy for
- Sports & training — laps, intervals and sets.
- Public speaking — rehearse to time.
- Cooking — track each step.
- Productivity — see how long tasks really take.
Frequently asked questions
How accurate is the stopwatch?
It measures elapsed time against the system clock rather than counting screen frames, so it stays accurate to the centisecond even if you switch to another tab while it runs.
What are lap times?
Tap Lap while the stopwatch runs to record a split. Each entry shows that lap's duration and the running total, and your fastest and slowest laps are highlighted automatically.
Can I pause and resume?
Yes. Press Stop to pause and Resume to continue from where you left off. Reset clears the time and all recorded laps.
Is anything stored or uploaded?
No. The stopwatch runs entirely in your browser — nothing is saved to a server.