Stopwatch
Usage Tips
Use lap times when you need to record each segment
Press the lap button when you need to measure total time and segment times together, such as running laps, workout sets, study problem solving, or work steps. You can save each segment without stopping the stopwatch, making it easier to compare pace changes and repeated task times.
What is Stopwatch?
The Stopwatch measures elapsed time in real time and saves lap records for timing events. It is suitable for study sessions, work tracking, workout intervals, experiment logging, and cooking time checks.
How to Use
- 1Start timing with the start control.
- 2Use stop to freeze the current elapsed value.
- 3Resume as needed to accumulate additional time.
- 4Use the lap control to save segment time and split time.
- 5Reset to clear the timer state and lap records.
Reference Knowledge
- ●Elapsed time is calculated from real timestamp differences.
- ●Lap time is the segment duration since the previous lap.
- ●Browser timer cadence can change when tabs are backgrounded.
- ●Use dedicated measurement devices for high-precision requirements.
FAQ
Q.Can background tabs introduce timing drift?
Browser power-saving policies may slow visual updates, but the elapsed time is recalculated from real timestamp differences, so accumulated time remains consistent for ordinary use.
Q.Is millisecond display always physically precise?
The display uses hundredths of a second, but actual timer resolution and screen update cadence can vary by device and browser state. Use dedicated equipment for official sports timing or high-precision experiments.
Q.Does this version include lap-time storage?
Yes. The lap button saves both the segment time since the previous lap and the total split time since the stopwatch started. Lap records can be copied or cleared.
Q.Does timing stop when I switch tabs?
The elapsed time is generally based on real time, but browser power-saving behavior may slow visual updates in background tabs.