Stopwatch
Precision stopwatch with lap recording.
What is Stopwatch?
The online Stopwatch is a browser-based timing tool that lets you measure elapsed time with precision — starting, stopping, and resetting a timer directly in your web browser. It includes lap recording functionality, allowing you to mark intermediate times without stopping the main timer.
A stopwatch has obvious athletic applications — timing a sprint, a swim lap, or a workout set — but the use cases extend far beyond sports. Presenters use stopwatches to rehearse speeches and keep within time limits. Teachers time classroom activities and exams. Developers benchmark the execution speed of tasks. Researchers measure reaction times and experimental durations. Cooks time recipes when multiple dishes are in progress simultaneously.
The browser-based stopwatch is always available — no physical device to find, charge, or carry. It is precise enough for everyday timing needs and convenient enough to open instantly on any device.
How to Use Stopwatch
- 1Step 1: Open the Stopwatch tool in your browser — the large display starts at 00:00:00 and the Start button is immediately visible.
- 2Step 2: Click 'Start' to begin timing. The display immediately begins counting up in hours, minutes, seconds, and hundredths of a second.
- 3Step 3: Click 'Lap' at any point to record the current elapsed time as a lap entry without pausing the main timer.
- 4Step 4: Click 'Stop' or 'Pause' to freeze the timer when you want to record the final time or temporarily halt measurement.
- 5Step 5: Click 'Reset' to clear the timer and all lap records back to zero, ready for the next timing session.
Benefits of Using Stopwatch
- ✓Lap Timer: Records individual lap splits without interrupting the main timer, ideal for multi-segment activities like intervals or multi-lap races.
- ✓Hundredth-Second Precision: Measures time to the hundredth of a second, providing the granularity needed for athletic and experimental timing.
- ✓Always Accessible: Available instantly in any browser on any device — phone, tablet, or desktop — without any download or account needed.
- ✓Multiple Sessions: Reset and reuse as many times as you need within a session, making it ideal for timing repeated tasks or sets.
- ✓Lap History Display: Lists all recorded laps with their individual split times and cumulative time, making it easy to compare intervals.
- ✓Distraction-Free Interface: Clean, minimal design keeps the focus on the time display — no ads or pop-ups interrupt time-sensitive operations.
Example
About Stopwatch
Stopwatch provides precise timing with start, stop, lap, and reset controls directly in your browser. Lap times are recorded and displayed alongside the running total. It's suitable for sports training, cooking, experiments, and any task requiring accurate time measurement.
- Start, stop, lap, reset controls
- Lap time recording and display
- Millisecond precision
- Running total alongside laps