Timer
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Finishes
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1:30:00
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My times
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An audio file up to 1 MB. It stays in this browser and appears as "My sound" in the Sound list.
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Read next: How to do a mock exam at home that actually prepares youAll 8 timers
GCSE exam clock for the hall
JCQ rules require the start and finish times to be displayed where every candidate can see them for the whole paper. A projected clock does that and removes the board-and-marker version that gets rubbed out by accident.
The short answer
Display the start time, the finish time and the time remaining for the whole paper, in a place visible to every candidate. Reading time counts separately and does not come out of the working time — set it here and the clock shows the reading period first, then starts the paper's own countdown, so the finish time written on the board always matches the screen.
Three steps to a timer on the wall
Step 1: Choose a time
Pick a preset or set your own. The timer remembers what you used last on this device.
Step 2: Press start
Start the timer, then press F or the fullscreen button to fill the screen.
Step 3: Run the room
Space pauses, the up arrow adds a minute, R resets. Fullscreen shows the timer alone, with no ads and no navigation.
Four things worth knowing
Calculate extra time before the paper, not during it
Twenty-five per cent on a 1 hour 30 paper is 22 minutes 30 seconds, giving 1:52:30. Working that out while candidates are waiting is where mistakes happen. The preset above has it done.
Reading time is not working time
Where a paper has supervised reading time, it sits before the exam and does not reduce it. Set it separately so the finish time the clock shows is the real one.
Write the same numbers on the board
The clock and the board must agree. Candidates check both, and a mismatch during a paper is a query you have to answer in silence in front of everyone.
Project it, do not leave it on a laptop
The requirement is that every candidate can see it. A screen at the front visible from the back row satisfies that; an invigilator's laptop does not.
No ads on your big screen
Ads pay for this page, and they stay on this page. The moment the timer goes fullscreen there is nothing on screen but the time — no banners, no navigation, no surprises in front of a room.
- Fullscreen shows the timer alone
- Ad sounds can never clash with the alarm
- Saved times stay on your device — no account
- Works with an ad blocker, and offline once loaded
Questions people ask
Anything we've missed?
Does reading time count towards the exam time?
No. Where a paper allows supervised reading time, it runs before the paper starts and does not reduce the working time. Set it separately so the displayed finish time stays correct.
How do I work out 25% extra time?
Add a quarter of the paper's length. A 1 hour 30 paper becomes 1 hour 52 minutes 30 seconds; a 2 hour paper becomes 2 hours 30. The preset above covers the most common case.
Can candidates see a clock during a GCSE exam?
They must be able to see the start and finish times throughout, and a clock showing time remaining alongside them is normal practice. Check your centre's own instructions for anything specific to a paper.
What happens if the screen sleeps mid-paper?
It will not. The clock holds a wake lock while it runs, so a three-hour paper stays on screen without the display dimming or a screensaver appearing.
Time something specific
Guides worth reading
- Exams
How to do a mock exam at home that actually prepares you
A mock only helps if it copies the real conditions: full length, one sitting, a visible finish time and no help. How to set one up at home and what to do after.
6 min read - Exams
How to split a 3-hour exam: a section-by-section time plan for CBSE papers
A section-by-section time plan for a 3-hour CBSE paper, with finish-by times from 10:30 to 1:30, for 80-mark Maths and 70-mark Physics.
7 min read - Exams
How to time an exam: start, finish, reading time and extra time
Start the clock when the paper begins, time reading separately, add extra time to the finish: 25% on 2 hours is 30 minutes. Free exam clock, no sign-up.
5 min read
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