Measure time and record lap times
Measure time and record lap times
Current Time
No lap times recorded
Accurate time measurement with 10-millisecond precision for precise records.
Record split times during measurement. Best and worst laps are highlighted automatically.
Switch to fullscreen to view the time on a large display.
A precise time measurement tool that works directly in your browser. Measures time with high precision down to 10 milliseconds, supports lap time recording and fullscreen mode.
Click Start
Press Start to begin timing. The stopwatch records time precisely in 10ms increments.
Record a Lap Time
While the stopwatch is running, press Lap to record a segment. It is added to the list with a sound effect.
Stop and Resume
Press Stop to pause timing, then Resume to continue.
Review the Results
The lap list shows each segment time, total time, and difference from the previous lap. Colors distinguish the fastest and slowest laps.
It measures time in 10-millisecond (0.01-second) increments. Although it runs in a browser, real-time correction using Date.now() provides accurate timing.
There is no limit. Lap times appear in a scrollable list, so you can record as many as you need.
Once you record at least 2 laps, the fastest lap is automatically highlighted in green and the slowest in red.
The stopwatch state is preserved during the session, but the records reset when you close the browser completely.
Yes. Start, stop, lap, and reset all work the same way in full-screen mode.