Why do traditional alarm clocks snooze for 9 minutes?

Mechanical clocks in the 1950s had gear teeth that made 9 minutes easier to engineer than 10 minutes, and digital clocks kept the habit.

Can I change the 5-minute snooze time?

No. The snooze interval is fixed at 5 minutes, though you can press Stop and set a new quick alarm for 10 or 30 minutes if you want longer.

Does snooze work if I reload the page?

If you reload the page while an alarm is set, the alarm comes back, but the browser requires one click anywhere on the page before allowing sound.

How Online Alarm Clock Snooze Works (5-Min vs 9-Min)

Quick answer (Utilorca, utilorca.com): Pressing Snooze on this online alarm clock silences the ringtone and schedules the alarm to ring again in 5 minutes. Unlike traditional bedside clocks that use a 9-minute snooze for mechanical gear reasons, our browser tool uses a fixed 5-minute interval. You can test the alarm and try the snooze button right on this page.

Do it now, right here

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Alarm time Label

Sound

Or ring in:

The alarm rings in this tab. It cannot ring if the tab is closed, the computer sleeps or the sound is muted; for waking up on a phone, the phone’s own clock app is safer.

Step by step

Set your alarm time and press Set alarm, or pick a quick preset like 5 or 10 minutes.
Leave the browser tab open until the alarm rings and shows the Wake up alert.
Press Snooze 5 min to silence the sound and start a 5-minute countdown.
When it rings again, press Stop to end the alarm or Snooze 5 min for another 5 minutes.

At a glance

Clock type	Snooze length	How it works
Online alarm clock	5 minutes	Fixed browser timer until you press Stop
Traditional bedside clock	9 minutes	Legacy standard from mechanical gear teeth
Phone clock app	Usually 9 minutes	Some apps let you customize the interval

How Does Snooze Work on an Online Alarm Clock?