What is the Stopwatch & Timer?
A stopwatch measures how much time has passed; a timer counts down from a set time and rings at zero. Cubestack has both on one page — time a run, a speech or an exam paper, or set a 5-minute tea timer.
How to use it
- 1
Choose Stopwatch or Timer
Switch between them at the top.
- 2
Start
Press Start or the space bar.
- 3
Laps or alarm
Tap Lap while timing, or wait for the timer's alarm.
Features
Lap times
Record laps and see the fastest in green and slowest in red.
Countdown with alarm
Set hours, minutes and seconds, or tap a preset like 5 or 25 minutes.
Exact in the background
Time is measured from the clock, not by counting ticks, so it stays right when you switch tabs.
Keyboard shortcuts
Space to start or pause, L for a lap, R to reset.
Popular uses
Exercise
Time runs, rounds and rest periods.
Exams and speeches
Practise to a time limit.
Cooking
A quick kitchen timer that rings.
Frequently asked questions
Will the timer ring if I switch tabs?
Yes, as long as the tab stays open. The tab title also shows the time left.
How accurate is it?
It shows hundredths of a second and uses the browser's high-precision clock.