All timers

30 Minute Timer

Press start and this 30 minute timer counts down 1,800 seconds to zero — full screen if you want it, with a gentle chime or a silent green flash when time is up. The 30 minute timer is one of the most-used timers on the web: roughly 301,000 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 focused work blocks, cooking, and half-hour study sessions.

30:00 of 30:00
30:00 of 30:00

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

Is 30 minutes long enough for deep work?

Half an hour clears the minimum length most focus coaches recommend for a meaningful block: long enough to load a problem into working memory and move it forward. Many people stack two 30 minute blocks with a real break between them rather than forcing a single uninterrupted hour.

How do I make the 30 minute 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 30 minute 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 30 minute 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 30 minutes?

30 minutes is exactly 1,800 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.

20 Minute Timer

Trim it: take twenty.

1 Hour Timer

Double it: take a full hour.

Classroom Timer

Silent default, board-readable digits.

All timers

Every length, from 1 to 90 minutes.