1 Hour Timer

Press Start to count down 1 hour.

This free 1 hour timer counts down 1 hour with a shrinking red disc you can read at a glance. 1 hour is 3,600 seconds (three thousand six hundred seconds), or 60 minutes. One hour covers an exam, a meeting, a lesson, a workout or a roast.

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What a 1 hour timer is good for

An hour is the basic unit most days are built from. Exams, meetings, lessons and classes are booked in hours, so a one hour countdown is one of the most practical long timers you can have.

An exam

Practise papers to a one hour limit so the real exam holds no surprises.

A meeting

An hour-long meeting stays on track when everyone can see the shrinking disc.

A lesson

Many secondary lessons and lectures last an hour.

A workout

A full gym session or class usually fits into an hour.

A roast

A small chicken roasts in about an hour at 190°C.

To pace yourself, glance at the disc rather than the numbers. With the 1 hour timer running, half the colour has gone after 30 minutes, and when only a quarter is left you have 15 minutes to wrap up. Open fullscreen if the timer needs to be read across a room, and add a label so everyone knows what the 1 hour are for.

How to use the 1 hour timer

  1. It is ready

    The dial is already set to 1 hour. To change it, drag the disc, tap a preset or open Custom.

  2. Press Start

    Or press the Space bar. The red disc shrinks back towards 12 o’clock as the time runs down.

  3. Watch the disc

    Read the time left at a glance, or open fullscreen for a big dial that fills the screen.

  4. Time’s up

    Your alarm plays until you press Stop. Press Reset or R to run the same time again.

1 hour in other units

1 hour equals
Seconds3,600
Minutes60
Hours1
Days0.0417
Fraction of a day1/24

Why use this timer

Why a visual timer helps

A shrinking disc turns time into something you can see. You read how much is left at a glance, without doing sums on a clock, and an invisible deadline feels less stressful when you can watch it approach. That is why visual timers are a staple in classrooms and are widely used by people with ADHD and autistic children and adults. Read our guide to using a visual timer, how it helps with ADHD time blindness, classroom transitions and autism.

Why this timer is accurate

The countdown is anchored to your device clock rather than counted in animation frames. It does not drift if you switch tabs or your screen sleeps: it keeps running in the background and still sounds the alarm on time. When you come back, the disc jumps straight to the correct position.

Frequently asked questions

There are 3,600 seconds in 1 hour, which is 60 minutes.

Timing an hour-long exam or mock paper, keeping a meeting on track, a full lesson, a workout or roasting a small chicken.

Yes. The 1 hour countdown is anchored to your device clock rather than counted frame by frame, so it stays accurate in a background tab and the alarm still fires when the 1 hour are up.

No. The 1 hour timer runs in your browser on phone, tablet and desktop. It is free, and there is no account, app or download.

Yes. Press the fullscreen button or the F key. The dial fills the screen, so the remaining part of the 1 hour is readable from the back of the room.

Yes, once this page has loaded. Nothing is sent over the network while the 1 hour count down, so a dropped connection will not stop the timer.

Sixty minutes, which is 3,600 seconds. The 60 Minute Timer is the same countdown.

Eight in a standard working day, though most people manage four to six hours of focused work.

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