All timers

15 Minute Timer

Press start and this 15 minute timer counts down 900 seconds to zero — full screen if you want it, with a gentle chime or a silent green flash when time is up. The 15 minute timer is one of the most-used timers on the web: roughly 450,000 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 focus sprints, silent reading blocks, and classroom stations.

15:00 of 15:00
15:00 of 15:00

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 15 minutes a good length for focused work?

Fifteen minutes is the entry point many focus coaches recommend for building a practice: long enough to make progress, short enough to remove the dread. Community discussions about Pomodoro-style timing repeatedly mention 10–15 minute sessions as the on-ramp for people who find 25 minutes hard to start.

How do I make the 15 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 15 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 15 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 15 minutes?

15 minutes is exactly 900 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.

10 Minute Timer

Need ten minutes instead?

20 Minute Timer

Halfway between: take twenty.

Classroom Timer

Silent default, board-readable digits.

All timers

Every length, from 1 to 90 minutes.