About Stopwatch
A precision stopwatch with lap timing functionality. Click Start to begin, Lap to record split times while the clock continues, Pause to freeze, and Resume to continue. Reset clears everything. Each lap records both the delta time (time since the last lap) and the total elapsed time, displayed in a scrollable table. The timer updates every 10 milliseconds for centisecond precision. All timing is handled client-side using the Date API for accuracy unaffected by JavaScript event loop delays. Perfect for timing workouts, cooking, presentations, or any activity tracking.
A Stopwatch That Works Anywhere
This online stopwatch runs directly in your browser with centisecond precision — accurate to one hundredth of a second. Unlike phone stopwatches that require unlocking your screen to see the time or check laps, this runs on your computer screen where you can monitor it at a glance while working.
It works entirely offline once the page has loaded — no internet connection is required for timing. Close other tabs to ensure browser resource allocation does not affect timing accuracy during long sessions.
Lap Timing
The lap function records the time at each split without stopping the main timer. This is useful for tracking multiple intervals within a single timing session — laps in a race, rounds in a game, stages in a process, or sections in a presentation. Each recorded lap shows both the split time for that interval and the cumulative elapsed time.
Use Cases
- Sports and fitness — time intervals, rest periods, running laps, or workout rounds.
- Studying (Pomodoro) — time 25-minute focus sessions with 5-minute breaks.
- Cooking — time multiple dishes simultaneously using the lap feature.
- Presentations — time each section to ensure you stay within your allotted time.
- Games — time speed runs, puzzles, trivia rounds, or board game turns.
- Testing — manually time how long a process or user flow takes.
Knowledge Base
The Stopwatch provides precision timing with centisecond accuracy, lap recording, and pause/resume functionality. It's useful for timing events, workouts, cooking, presentations, and any activity that needs accurate time tracking.
- 1Click 'Start' to begin the stopwatch.
- 2Click 'Lap' to record lap times while the stopwatch continues running.
- 3Click 'Stop' to pause and 'Reset' to clear all times.
The stopwatch runs entirely in your browser with no internet connection required. It provides accurate timing with zero server dependency, works offline, and keeps your timing data completely private.
How accurate is the stopwatch?
The stopwatch provides centisecond (1/100th of a second) accuracy. It uses your device's high-resolution timer for precise measurements.
Does it work offline?
Yes. The stopwatch runs entirely in your browser with no server dependency. Once the page is loaded, it works perfectly offline with no internet connection required.