Stopwatch
A simple and accurate stopwatch with lap times.
How to Use
- Click Start to begin timing.
- Click Lap to record split times.
- Click Stop and Reset as needed.
Frequently Asked Questions
Does it work in the background?
Yes, the timer continues even if you switch tabs.
Free Online Stopwatch with Lap Times for Training and Work
Whether you are timing a sprint or a presentation, accuracy matters. Our free online stopwatch with lap times records split intervals with millisecond precision right in your browser.
What is Stopwatch?
A Stopwatch is a precise timekeeping instrument that measures elapsed time from a starting moment to a stopping moment. Modern digital stopwatches add lap functionality, which records split times without interrupting the overall countdown. Athletes have used lap timers for decades to compare performance across identical distances, but the same principle applies to any repetitive process, from software deployment intervals to speech rehearsals. A browser-based stopwatch brings this utility to any device without installing extra software.
Common Use Cases
- Running and swimming: Record lap splits to analyze pace consistency across a full workout.
- Science experiments: Time chemical reactions, pendulum swings, or falling objects with student-friendly precision.
- Cooking and baking: Track multiple overlapping stages, such as proofing dough and simmering sauce.
- Work sprint reviews: Measure how long repetitive tasks actually take to improve future estimates.
- Public speaking practice: Time sections of a presentation to ensure you stay within allotted minutes.
How to Use Stopwatch
- Open the Stopwatch and click Start to begin counting.
- Press Lap whenever you want to record a split time while the main timer continues running.
- Click Stop when the activity ends, then review the full list of lap intervals.
- Reset the display to zero when you begin a new session or participant.
- Keep the tab open in the background; the timer continues even if you switch windows.
Tips & Best Practices
- Name or number your laps immediately after recording so you remember what each split represents.
- Use lap data to identify fatigue points; slowing splits often signal the need for better pacing.
- Run multiple trials and average the results rather than relying on a single measurement.
Ready to try it?
Use our free Stopwatch now. No signup required.
Related Tools
- Pomodoro Timer — Switch from open-ended timing to structured work intervals.
- Time Tracker — Aggregate stopwatch data into daily task summaries.
- World Clock — Coordinate timed events across different time zones.