Online stopwatch

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Stopwatch data

TT Lap Time Elapsed Time Current Time

Online Stopwatch – Precision Timing with Full Control

Welcome to our advanced Online Stopwatch, designed for anyone who needs accurate and flexible timing solutions. Whether you're tracking workouts, productivity sessions, experiments, or just love precision tools, our stopwatch delivers professional-grade control—no installation, no signup needed. For those who simply want to keep track of the current time, try our Online Clock instead.

1. Start, Stop & Pause

Begin your timing session instantly with the Start button. Need a break? Hit Pause to freeze the time in place while preserving the current count. When you're ready to resume, simply press Start again—our stopwatch continues from where you left off. And when it's time to finish, the Stop button halts the timer completely while saving the total elapsed time.

  • Start: begins counting from zero
  • Pause: holds the timer without resetting
  • Resume: restarts counting after pause
  • Stop: ends the session and saves final time

2. Lap / Split Functionality

Track individual segments of a single session using the Lap feature. Each lap records the time elapsed since the previous lap or the start. All lap times are listed instantly in a structured table for easy review and comparison.

  • Unlimited laps per session
  • Automatic lap table showing cumulative and split times
  • Visual highlights for fastest, slowest, and average laps

3. Reset & Clear Data

Once you're done or want to start fresh, hit Reset to clear the timer and all lap data instantly. This resets your stopwatch to zero, clearing every previous lap and allowing you to begin a brand new session.

4. Hide Seconds & Hundredths Precision

Customize your stopwatch display by toggling visibility of seconds or hundredths (centiseconds/milliseconds). Want a minimalist look or only minute precision? Easily switch off unnecessary time units to suit your needs.

  • Option to hide or show seconds
  • Option to hide or show hundredths
  • Clean, simplified displays for clarity

5. Stopwatch Data Management

Every stopwatch session includes a full data table showing all lap times, cumulative duration, and optional timestamps. This data remains visible throughout the session and can be edited or cleared as needed.

  • Real-time data logging
  • Edit or delete individual laps
  • Retain session history until reset

6. Export to Excel or CSV

When your session is complete, click “Export” to download your timing data as a CSV file. Open it in Excel or Google Sheets for advanced analysis or record-keeping. The exported file includes lap numbers, split times, cumulative times, and optional notes.

  • Export session data to CSV format
  • Compatible with Excel, Google Sheets, and statistical tools
  • Data includes lap number, split duration, cumulative time

7. Fullscreen Mode & Keyboard Shortcuts

Enhance your workflow or display by using Fullscreen mode—perfect for classrooms, presentations, workouts, or tracking sessions in focus mode.

  • Fullscreen toggle button
  • Keyboard shortcuts: Space to start/stop/pause, “L” for lap, “R” for reset
  • Auto-resizes for different screen sizes and devices

8. Why Choose Our Online Stopwatch?

  • No downloads or installations required
  • Reliable and precise timing up to millisecond accuracy
  • Unlimited laps, data export, and customizable display
  • Privacy-friendly and ad-free design
  • Fully responsive—works on desktop, tablet, and mobile

Use Cases & Applications

  • Sports & Fitness: Record lap times in workouts, drills, or training sessions
  • Studying & Productivity: Use lap segments to break tasks into intervals or Pomodoro sessions
  • Experiments & Science: Measure event durations to hundredths of a second, log results precisely
  • Training & Events: Display stopwatch in fullscreen at virtual events, webinars, or workshops
  • If you need to count down from a specific time instead of counting up, try our Countdown Timer tool.

Ready to start timing?

Click the Start button above to begin your session. Use Pause/Stop, manage laps, and export your data—all with full control and accuracy.

🛠️ Explore more time tools

Online stopwatch – Common questions & Answers

1. What is the Online Stopwatch?
➥ The Online Stopwatch is a free web-based tool that allows you to track elapsed time with features like start, pause, reset, lap recording, data export, and more.
2. How do I start or stop the stopwatch?
➥ Click the 'Start' button to begin counting time. Click it again (or the 'Stop' button) to pause or stop the stopwatch.
3. Can I pause the stopwatch and resume later?
➥ Yes, you can pause the stopwatch at any moment and resume from where you left off by clicking the 'Pause' and 'Start' buttons.
4. How does the Lap function work?
➥ The Lap function records the current elapsed time as a new lap without stopping the stopwatch. Each lap is saved in a list for review or export.
5. Is there a way to reset the stopwatch?
➥ Yes. Click the 'Reset' button to clear all timing data and start fresh. This also clears all lap records unless you've exported them.
6. Can I export the stopwatch data?
➥ Yes, you can export all recorded laps and time data to CSV or Excel format for further analysis or archiving.
7. Is it possible to delete specific laps?
➥ Yes. The interface allows you to delete individual lap records or clear the entire list of laps as needed.
8. Can I hide seconds or hundredths of a second?
➥ Yes, there are options to toggle the display of seconds and hundredths depending on your preference or focus.
9. Does the stopwatch work offline?
➥ The stopwatch can function in your browser even when offline, but data export and saving laps may be limited without an internet connection.
10. Is there a fullscreen mode for the stopwatch?
➥ Yes, you can switch to fullscreen mode for better visibility during presentations, workouts, or focus sessions.
11. Can I use this stopwatch on mobile devices?
➥ Absolutely. The stopwatch is fully responsive and works smoothly on smartphones, tablets, and desktop computers.
12. Is the stopwatch free to use?
➥ Yes, our Online Stopwatch is completely free and does not require registration or installation.
13. Can I save my stopwatch session?
➥ While the stopwatch doesn’t auto-save, you can manually export your session data for storage and future reference.
14. What’s the difference between Reset and Stop?
➥ Stop pauses the stopwatch and retains your data, while Reset clears all time and lap records, starting everything from zero.
15. Is there a limit to how many laps I can record?
➥ There is no practical limit to the number of laps you can record. However, for performance, extremely long sessions may require more memory.