About this stopwatch
A stopwatch that counts up in minutes, seconds and hundredths. Press start, take a lap whenever you want a split, and the times stay on screen until you reset them.
What it does
- Times to a hundredth of a second.
- Records unlimited laps, each with its own split and running total.
- Marks the fastest and slowest lap as you go.
- Shows the elapsed time in the tab title.
- Keeps counting through a reload, and keeps your laps until you reset.
Does it keep running if I switch tabs?
Yes. Minimise the window or move to another tab and it keeps timing. It stops only if you close the tab or quit the browser.
What happens if my device sleeps?
The stopwatch reads the system clock, so the elapsed time is still right when the device wakes.
What is a lap?
A lap saves the time since the previous lap, along with the total so far — useful for repeated intervals, race splits or timing each step of a routine.
How accurate is it?
It is as accurate as your device clock, which is more than enough for training, cooking, study sessions or experiments. It is not a certified timing device for competition.