Stopwatch
Precise time tracking with lap recording and split times.
Lap Times
No laps recorded yet. Start the stopwatch and click "Lap" to record lap times.
Search Tools
Related Tools
Understanding Stopwatch & Time Measurement
A stopwatch is a precision timing device used to measure time intervals with high accuracy. Modern digital stopwatches can measure time down to milliseconds, making them essential for sports, fitness, scientific experiments, and any activity requiring precise time tracking with lap and split time recording.
| Unit Type | Unit Name | Value in Seconds (s) |
|---|---|---|
| Time Unit | Millisecond (ms) | 0.001 seconds |
| Time Unit | Centisecond (cs) | 0.01 seconds |
| Time Unit | Decisecond (ds) | 0.1 seconds |
| Time Unit | Second (s) | 1 second |
| Time Unit | Minute (min) | 60 seconds |
| Time Unit | Hour (h) | 3,600 seconds |
| Stopwatch Type | Mechanical | Spring-powered, ±0.2s accuracy |
| Stopwatch Type | Digital | Battery-powered, ±0.001s accuracy |
| Stopwatch Type | Professional | High-precision, ±0.0001s |
| Stopwatch Type | Olympic Timer | Ultra-precise, ±0.00001s |
| Features | Start/Stop | Begin and pause timing |
| Features | Lap Time | Record intermediate times |
| Features | Split Time | Individual segment duration |
| Features | Memory | Store multiple time records |
| Features | Reset | Clear all recorded times |
| Sports Use | Track & Field | Sprint, relay, hurdles timing |
| Sports Use | Swimming | Lap times and race results |
| Sports Use | Racing | Formula 1, cycling, motorsports |
| Sports Use | Team Sports | Game duration, timeouts |
| Fitness Use | HIIT Training | Interval timing (30s/60s) |
| Fitness Use | Running | Mile splits, pace tracking |
| Fitness Use | Circuit Training | Exercise duration tracking |
| Fitness Use | Rest Periods | Recovery time between sets |
| Scientific Use | Chemistry | Reaction time measurement |
| Scientific Use | Physics | Motion and velocity studies |
| Scientific Use | Biology | Behavioral observations |
| Daily Use | Cooking | Baking, boiling, timing recipes |
| Daily Use | Presentations | Speech duration tracking |
| Daily Use | Studying | Pomodoro technique (25 min) |
| Daily Use | Gaming | Speedrun timing |
| Records | 100m Sprint | 9.58s (Usain Bolt, 2009) |
| Records | Marathon | 2:00:35 (Kelvin Kiptum, 2023) |
| Records | 50m Freestyle | 20.91s (Cesar Cielo, 2009) |
| Human Performance | Reaction Time | 0.15-0.3 seconds |
| Human Performance | Eye Blink | 0.1-0.15 seconds |
| Human Performance | Heartbeat | ~1 second (60 bpm) |
Conversion Tip
Stopwatches provide precise time measurement down to milliseconds. They are essential for sports timing, workout tracking, cooking, scientific experiments, and any activity requiring accurate time intervals with lap recording capabilities.
Quick Reference
- 1 second = 1,000 milliseconds
- 1 minute = 60 seconds = 60,000 milliseconds
- 1 hour = 60 minutes = 3,600 seconds
- Professional stopwatches measure up to 1/1000th of a second
- Olympic timing systems measure to 1/10,000th of a second
- Lap time = Current time - Previous lap time
- Split time = Individual segment duration
- Average lap = Sum of all laps ÷ Number of laps
- World record 100m sprint: 9.58 seconds (Usain Bolt)
- Marathon world record: 2:00:35 (Kelvin Kiptum)
- Stopwatches are used in athletics, swimming, racing, and fitness
- Digital stopwatches offer higher precision than analog
- Reaction time in sports averages 0.2-0.3 seconds
- Fastest human reflex time: ~0.15 seconds
- Memory lap feature stores multiple time intervals