Timing and lap times
Start begins timing, “Lap” stores a split, stop pauses the watch and clear resets everything. The space bar starts and stops without a mouse.
Stopwatch
Online Stopwatch with Lap Times
This online stopwatch measures to the millisecond and records individual laps. Start and stop with a click or the space bar.
Stopwatch
00:00.00
Laps
No laps recorded yet.
Workout options
Your browser does not support screen wake lock.
Huge buttons for tapping without looking.
Countdown before start
Lap analysis for sports and intervals
The lap list shows the delta to the previous lap, the average, and highlights the fastest and slowest lap – useful for running intervals, swim laps or strength sets.
Sports mode and pre-start countdown
Sports mode enlarges the controls for tapping without looking. A 3 or 5 second pre-start countdown also gives you an audible starting cue.
Keep the screen awake
On supported devices the wake lock option prevents the screen from turning off while you are timing.
Frequently asked questions
- How accurate is the online stopwatch?
- It uses the browser high-resolution clock and displays hundredths of a second, which is accurate enough for sport, school and everyday timing.
- Can I compare lap times?
- Yes. Every lap is stored with total time and the delta to the previous lap, and the best and worst laps are highlighted.
- Does it keep timing in the background?
- Yes. Elapsed time is calculated from timestamps, so the display is correct when you return to the tab.