TetraKitsStopwatch
Time workouts, experiments, and cooking stages with centisecond precision. Start the stopwatch, tap Lap to record split intervals, and review every split in a scrollable list — no sports watch required.
Read: Online Stopwatch Guide: Lap Times & Split Intervals →
- Free to Use
- No Signup
- Privacy Friendly
How to use the stopwatch
- 1
Start timing
Click Start to begin. The display shows elapsed time as MM:SS.CS (centiseconds).
- 2
Record lap splits
Click Lap at each interval. Each lap shows the split since the previous lap and total elapsed time.
- 3
Pause or reset
Pause to freeze elapsed time, then resume. Reset clears all laps. For countdowns, use the timer.
Stopwatch and lap times
The stopwatch measures elapsed time from performance.now() for sub-second accuracy. Each lap records the split since the previous lap (or since start for lap 1).
- Elapsed — total time since start
- Lap split — time since previous lap marker
- Reset — clears elapsed time and all laps
Why Use This Tool?
Unlimited Laps
Record as many lap splits as your session needs.
Split Times
Each lap shows interval since the previous marker.
Workout Ready
Time runs, intervals, and experiments on any device.
Local Timing
No data sent to any server.
Frequently Asked Questions
How do lap times work?
Each lap records the interval since the previous lap. Lap 1 shows time since start; lap 2 shows time between lap 1 and lap 2. Total elapsed appears in parentheses.
How precise is the stopwatch?
The display shows centiseconds (hundredths of a second). Browser timing is suitable for workouts and everyday use.
Does the stopwatch run in the background?
It runs while the tab is active. Background tabs may throttle timers in some browsers.
Can I record unlimited laps?
Yes. Record as many lap splits as your session needs. The list scrolls when it gets long.
Is this stopwatch free?
Yes. Free with unlimited laps and no signup.
Lap Splits Without a Sports Watch
Interval training, lab experiments, and multi-stage recipes benefit from split times you can review afterward. A browser stopwatch with a lap list replaces dedicated timing apps for most everyday needs.
