All timers

1 Hour Timer

Press start and this 1 hour timer counts down 3,600 seconds to zero — full screen if you want it, with a gentle chime or a silent green flash when time is up. The 1 hour timer is one of the most-used timers on the web: roughly 90,500 US searches a month (Semrush, 2026). This page is free, with no ads and no sign-up, works offline once loaded, remembers your volume on this device, and shows the exact clock time it will finish — so one glance tells you where you stand. It is built for meetings, study halls, and long cooking steps.

60:00 of 60:00
60:00 of 60:00

Done at —

We keep the tab title updated too, so you can watch it from another tab.

Time's up. Done.
30%

Sound level is remembered on this device. Muted? Time-up flashes the screen instead.

Full screen

One click. Nothing but the timer.

Silent option

Screen flashes fern green when time is up.

Completion time

You always see exactly when it ends.

Frequently asked questions

How do I track an hour without watching the clock?

Start the hour timer and switch to the shrinking-disc view: the green wedge draining from the circle is readable from across a room at a glance, which is why teachers and meeting leads prefer it over digits. The page title counts down too, so you can watch the remaining time from another browser tab.

How do I make the 1 hour full screen?

Press Start, then click the Fullscreen button (or press F). The whole window becomes nothing but the timer: digits big enough to read from across a classroom or office. Press Esc to leave full screen; the timer keeps running either way.

Does the 1 hour make a sound when time is up?

Only if you want it to. The default chime is a soft, synthesized two-note tone, not a harsh buzzer. Drag the volume slider to set the level, or mute it entirely: when muted, the screen flashes fern green instead, so a silent room stays silent. Your setting is remembered on this device.

Can I use the 1 hour offline?

Yes. The page is a single self-contained file with no external requests beyond Cloudflare’s privacy-respecting, cookie-less page-view counting, and it installs as a PWA: after your first visit, the timer keeps working with no network at all. That makes it reliable on school networks, planes, and dead zones.

How many seconds is 1 hour?

1 hour is exactly 3,600 seconds. If you need a different length, the All timers page links every preset from 1 to 90 minutes and 1 hour, and each page switches between a shrinking-disc view and plain digits.

Related timers

Adjacent lengths and the tools people pair with this one.

30 Minute Timer

Half of it: take thirty.

15 Minute Timer

A quarter hour instead.

Classroom Timer

Silent default, board-readable digits.

All timers

Every length, from 1 to 90 minutes.