Workout Timer
Work/rest intervals with sound
Workout Timer
WORK
0:40
Set 1 / 8
※ Beeps on start, rest transition and finish. Keep the screen on; on phones the sound may not fire if the screen is off or you switch apps (browser limitation).
⚠️ Reference only. The timer runs in your browser; if you turn off the screen or switch apps on a phone, the sound/alert may not fire (browser limitation). calcstool.com assumes no liability.
FAQ
How to use it?
Set work seconds, rest seconds and number of sets, then Start; it repeats work→rest for each set with a beep on transitions.
Tabata?
Yes — work 20s, rest 10s, 8 sets. Default is work 40s / rest 20s.
No sound when screen off?
A browser-timer limitation. Keep the screen on; for background alerts use a dedicated app.
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