Online Timer
Set a simple countdown timer for any number of minutes — no app or sign-up needed, just press start.
Also covers: timer 10 minutes, 5 min timer, 10 min timer
Online Timer
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View on AmazonHow the Online Timer works
- Choose a preset length, or enter a custom duration.
- Press Start to begin.
- Press Pause to hold, or Reset to return to the starting value.
Formula / logic
Not formula-based — this is a live countdown or stopwatch driven by your device's clock, ticking down (or up) once per second.
Worked example
Selecting the 25-minute preset on a Pomodoro-style timer starts a focus block that automatically switches to a break once it reaches zero.
Frequently asked questions
Will it alert me when time is up?
Yes, the timer displays a clear on-screen alert when it reaches zero.
Will the timer alert me when it finishes?
The display updates to show the timer has finished; keep the tab visible or use your device's own notification/sound settings for an audible alert.
Can I change the preset lengths?
Yes — use the custom duration field to set any length beyond the quick-select presets.
Is the Online Timer free to use?
Yes — every calculator on this site is free, with no sign-up or download required.
Does the Online Timer work on mobile?
Yes, the layout and calculator both adapt to phone and tablet screens.