Timer & Stopwatch
This browser-based tool combines countdown timer and stopwatch functionality in one. Features include second-level timer settings, millisecond-precision stopwatch, lap time recording, and sound/notification alerts. Perfect for cooking, running, and presentation practice. No registration required for instant use, and no data is transmitted externally.
What You Can Do
The Timer & Stopwatch tool combines countdown timer and stopwatch functionality in one, enabling precise time tracking and management. Perfect for second-level countdowns and millisecond-precision stopwatch. Browser-based with no registration required for instant use.
- ✅ Countdown Timer: Perfect for cooking, presentation practice, meditation, and time-limited tasks
- ✅ Stopwatch: Millisecond precision with lap time recording for running and fitness
- ✅ Sound & Notifications: Audio and browser notifications when timer ends to keep you focused
カウントダウンタイマーとストップウォッチの2機能を搭載。ラップタイム計測・通知機能付き。料理・運動・作業時間の計測に最適。
💡 Use Cases
- Timer: Cooking times, instant noodles, presentation practice timing
- Stopwatch: Running, workout intervals, task time tracking
- Meeting and presentation time management
- Managing children's study and break times
- Setting time limits for games and quizzes
📖 How to Use
⏲️ How to Use Timer
Set the Time
Enter hours, minutes, and seconds, or select a time using quick setting buttons.
Click Start Button
The countdown begins. You can pause and resume as needed.
Timer Completion
When time is up, you'll be notified with sound and notification.
⏱️ How to Use Stopwatch
Click Start Button
Count-up begins from 00:00:00.
Record Laps
Record intermediate times. Multiple lap times can be saved.
Pause & Reset
Pause to check records or reset to start over.
📚 Time Measurement Basics
🎯 Timer vs Stopwatch Usage
While timers and stopwatches may seem similar, choosing the right one for your task is important. <strong>Timers</strong> count down from a set time, ideal for "completing tasks within a time limit" like cooking times or presentation prep. <strong>Stopwatches</strong> count up from zero, perfect for "recording elapsed time" like running pace tracking or workout intervals.
- Best Timer Uses: Cooking (boiling, heating), online meetings (speaking time limits), meditation & fitness video tracking
- Best Stopwatch Uses: Sports training, running, workout rest intervals, visualizing work time
⚡ Stopwatch Precision & Measurement
Digital stopwatch accuracy depends on the browser's JavaScript execution environment. This tool supports millisecond (1/1000 second) precision, suitable for sports measurement and scientific experiments. However, due to OS power-saving features and background processes, professional measurement equipment is recommended for extremely precise timing (e.g., track & field 0.01-second accuracy).
- High Precision Use Cases: Walking/running (±0.1s accuracy), workout set measurement, general sports activities
- Reduced Accuracy Scenarios: Browser in background, OS power-saving enabled, multiple heavy processes running
- Accuracy Tips: Keep browser window active, close other browser tabs, disable PC battery saver
⏰ Effective Time Management Techniques
Timer and stopwatch tools like this are core components of psychologically proven time management methods. The <strong>Pomodoro Technique</strong> alternates 25-minute focus sessions with 5-minute breaks to maintain sustained high concentration. <strong>Timeboxing</strong> completes tasks within set time periods, automating priority decisions and reducing decision fatigue. Research shows these methods combined with timers can improve productivity by an average of 30-40%.
- Pomodoro Technique: 25-min timer → 5-min break → repeat 4 times (then 15-30 min long break)
- Timeboxing Method: Block morning work into 3×30min, post-lunch into 2×45min segments
- Practice Tips: Use lap time feature to accumulate task duration data and improve future time estimates
❓ Frequently Asked Questions
When the browser is in the background, OS power-saving features may cause inaccurate operation. For important measurements, keep the screen active.
Check your browser's volume and mute settings. Also verify that "Play sound when finished" is checked.
Browser notification permission is required. Check "Show notification when finished" to be prompted for permission.
Currently, lap times are only temporarily displayed in the browser without persistent storage. Please manually copy if needed.
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