Stopwatch

The digital stopwatch is your perfect timing tool for training, work, and everyday situations. With real-time display, lap time tracking, and fullscreen mode, it offers all the essential features of a professional stopwatch - directly in your browser!

Getting Started

The stopwatch is extremely easy to use and gets you ready in seconds:

Start: Click "Start" or press the spacebar to begin timing
Stop: Click "Stop" or press the spacebar to pause
Lap Times: While the stopwatch is running, click "Lap" to record lap times
Reset: Click "Reset" to reset the stopwatch and clear all lap times
Fullscreen: Click the fullscreen icon for distraction-free timing

💡 Tip: Use keyboard shortcuts for faster operation! Spacebar for start/stop, "L" for lap, "R" for reset, and "F" for fullscreen mode.

Main Features

Real-Time Timing

The stopwatch measures your time with high accuracy:

Format: HH:MM:SS.cc (Hours:Minutes:Seconds.Centiseconds)
Update Rate: Time updates every 10 milliseconds for smooth display
Precision: Millisecond accuracy for precise measurements
Continuous Measurement: The clock continues running when you pause and resume

ℹ️ Info: The stopwatch uses your device's system time for maximum accuracy. It works offline and stores your data in the browser.

Lap Time Tracking

Perfect for measuring multiple stages or laps in your training:

Record Lap: Click "Lap" while the stopwatch is running to record a lap
Lap Numbers: Each lap is numbered (Lap 1, Lap 2, etc.)
Total Time: Shows the time since the start for this lap
Lap Difference: Shows the duration of the current lap compared to the previous lap
Lap List: All lap times are displayed in an overview

💡 Tip: Use lap times to optimize your training! You immediately see which laps were faster or slower.

Copy Lap Times

Share your lap times with others or save them for analysis:

Copy All Laps: Click the "Copy" icon to copy all lap times
Formatting: Lap times are nicely formatted with lap numbers and differences
Clipboard: Text is copied immediately - simply paste where you want
Offline Usage: Works anywhere and anytime without internet connection

Example Lap Times Format:

Lap 1: 00:01:30.25 (00:01:30.25)
Lap 2: 00:03:05.80 (00:01:35.55)
Lap 3: 00:04:40.10 (00:01:34.30)

Explanation: First lap took 1:30, second lap took 1:35, third lap took 1:34

Fullscreen Mode

For focused timing without distractions:

Hides: Header and footer are hidden
Large Display: The stopwatch display is enlarged for better visibility
Bigger Buttons: Control buttons are enlarged for easier operation
Exit: Press ESC or click "Close" to exit fullscreen mode

ℹ️ Info: Fullscreen mode is ideal for presentations, lectures, or professional training supervision!

Keyboard Shortcuts

Fast keyboard control for efficient operation:

Spacebar or "S": Toggle start/stop (very useful!)
Enter: Starts the stopwatch
"L": Records a new lap
"R": Resets the stopwatch
"F": Toggle fullscreen mode on/off
ESC: Exits fullscreen mode

💡 Tip: The spacebar is your best friend! Some users never move their hand off the spacebar and start/stop with it. Much faster than using the mouse!

Use Cases

When is the stopwatch particularly useful?

Sports & Training: Time measurement for training sessions, track laps, or gym exercises
Kitchen & Cooking: Perfect for cooking! Timer for doughs, baking, or cooking food with lap tracking
Exams & Presentations: Control the time during presentations or exams
Productivity & Pomodoro: Use the stopwatch for productivity techniques like the Pomodoro method
Gaming & Speedrunning: Measure your times for video games or challenge runs
Teaching & Classroom: Teachers can measure time for tests or group work
Scientific Experiments: Precise measurements for lab work or school projects
Events & Competitions: Timing for running events, swimming competitions, or conferences

Tips & Best Practices

Use the Spacebar: Use the spacebar for start/stop instead of the mouse - it's much faster and more ergonomic!
Fullscreen for Events: For running events or presentations, fullscreen mode helps minimize distractions.
Analyze Lap Times: The differences show where your training was consistent and where improvements are needed.
Copy & Save: Copy your lap times after each training session and save them in a note-taking app.
Share with Others: Share your times with coaches or friends for comparisons and motivation!
Offline Available: The stopwatch works without internet - perfect for places without network connection!
Keep Browser Tab Open: Let the stopwatch run in the background while you use other tabs.

Technical Details

Time Format & Calculation:

The stopwatch uses the following format:
HH = Hours (00-23) | MM = Minutes (00-59) | SS = Seconds (00-59) | cc = Centiseconds (00-99)

Lap Calculation:

Total Time = Time since start | Lap Difference = Total time of this lap - Total time of previous lap

ℹ️ Info: The stopwatch uses your browser's LocalStorage to store data. This means: privacy comes first - everything stays on your device!

Practical Examples

Sports Training Example

Scenario: 3x400m run with breaks

Start the stopwatch → Lap after first 400m (e.g., 01:15.80) → Break → Lap after second 400m (02:31.40) → Break → Lap after third 400m (03:50.20)

Analysis: You immediately see that your third interval took 1:18.80 (slower than the others) - time for longer recovery!

Cooking Time Example

Scenario: Cooking pasta with multiple components

Start → Lap after 5 min (add vegetables) → Lap after 8 min (add sauce) → Lap after 10 min (ready - al dente)

Advantage: You never forget when to add what! The laps remind you of the right time.

Pomodoro Technique Example

Scenario: 25-minute work blocks with breaks

Start → 25 min work → Lap marks end of work phase → 5 min break → Lap marks end of break → Repeat

Productivity: After 4 blocks (with laps), you've perfectly completed the productivity technique and can see your total time!