Exam Clock
A full-screen classroom timer and countdown, with the extra-time finish worked out for every group of candidates.
Everything is computed in your browser; no instruction, no name and no time is ever sent to a server.
Running the exam online instead? Evalmee times each candidate individually, extra time included, and submits the paper automatically at the right minute. Open Evalmee
How to use the timer in an exam room
- 01
Enter the start time and the length of the paper
The start time is pre-filled with the current time rounded up to the next five minutes; change it if the paper starts later, then type the length of the paper in minutes.
- 02
Add one row per group of candidates
Each row carries a label and an allowance: standard time, 25 %, 50 %, 100 % or any percentage you type. The matching finish time appears under the clock, one line per group.
- 03
Go full screen and project it
The full-screen button scales the display to the size of the screen: the digits then take up close to a third of its height, which stays readable from the back of a hall. The dark theme suits a room with the blinds down.
Showing the extra-time finish
A room holding candidates with access arrangements needs two finish times on the wall, sometimes three. That is what the group list does: one row for standard time, one for 25 % extra time, one for 50 %, each showing its own finish time under the clock.
Percentages are applied to the length of the paper and the total is rounded to the nearest minute, half a minute rounding up — the rule the published extra-time tables follow, so that 1 h 45 with 25 % extra time reads 2 h 11 here and 2 h 11 on the paperwork. The French tiers-tempsTiers-temps (French statutory extra exam time)The extension of exam time granted to a candidate with a disability. The French code de l'éducation provides that it may not exceed a third of the time normally allowed, a longer extension remaining possible exceptionally, on the reasoned request of the doctor who examines the situation. is an exact third rather than 33 %, and is treated as such: a three-hour paper ends at four hours precisely.
Supervised rest breaks are added flat, never multiplied: ten minutes of rest stay ten minutes whatever percentage was granted. If you are preparing the candidate list before the session rather than the room display, the extra time calculator produces the name-by-name table and can hand this page its groups already filled in.
| Length of paper | Standard | 25 % extra time | 50 % extra time | 100 % extra time |
|---|---|---|---|---|
| 1 h 00 | 1 h 00 | 1 h 15 | 1 h 30 | 2 h 00 |
| 1 h 30 | 1 h 30 | 1 h 53 | 2 h 15 | 3 h 00 |
| 1 h 45 | 1 h 45 | 2 h 11 | 2 h 38 | 3 h 30 |
| 2 h 00 | 2 h 00 | 2 h 30 | 3 h 00 | 4 h 00 |
| 3 h 00 | 3 h 00 | 3 h 45 | 4 h 30 | 6 h 00 |
A 30, 45, 60, 90 or 120 minute countdown
The countdown tab shows the time left in very large digits, with a progress bar, a colour change at five minutes and again at one minute — two thresholds you can edit — and an optional alarm, off by default. The duration chips set the timer in one click and write the duration into the page address, so a shortcut to a 45-minute timer can be bookmarked.
The count is derived from the target finish instant, never by adding up clock ticks. A backgrounded tab, a sleeping laptop or a loaded machine therefore cannot shift it: two hours into a paper, the display still agrees with the invigilator's watch. Pause, resume and a plus-five-minutes button stay available, and the lock removes the controls from the screen so that a stray click cannot reset a running paper.
30 minute timer
The length of a class test or a speaking-exam preparation slot: thirty minutes, a warning at five, a second one at one.
45 minute timer
A teaching period minus the time it takes to settle a room; it is also the most requested format for an invigilated quiz.
60 minute timer
A full hour, which 25 % extra time takes to 1 h 15 and 50 % takes to 1 h 30.
90 minute timer
An hour and a half: the most common paper length in secondary schools, and the one whose 25 % allowance lands on 1 h 53.
120 minute timer
Two hours, the length at which a badly built timer starts visibly drifting; here the display is recomputed from the finish instant on every refresh.
Projecting the clock on a beamer
The full-screen button blows the display up to the size of the screen: the digit size follows the height of the window and the controls disappear apart from the exit button. Escape returns to the page. On a 1080p projector the digits exceed a quarter of the screen height, which stays readable from ten metres away. On a computer and on Android the browser also hides its own address bar; on iPhone and iPad it does not allow that — add the page to the Home Screen to lose it too. The screen stays awake for as long as the display is open.
The light theme — near-black digits on white — carries better in a room lit by daylight; the dark theme suits a lecture hall with the blinds down and is gentler on the projector. The instructions you type below the clock appear under the finish times, one per line, and three ready-made ones are offered so you do not retype them every session.
Once the page has loaded, nothing more is asked of the network: the clock, the countdown, the alarm and the printing all work offline. The trade-off is that the time shown is the computer's own, with no server to correct it — check its setting before the session, as you would check a wall clock.
What must an exam room display?
The constant, whatever the exam, is that the start time and the finish time are visible from every seat, along with a clock candidates can read without turning round. Depending on the paper, the room also displays the permitted materials, the earliest time a candidate may leave, and a reminder of the penalties for malpractice.
For centres following the JCQ regulations, the instructions for conducting examinations require the start and finish times to be displayed and visible to candidates throughout the examination, with a centre-supplied clock in every room. The wording changes between series and is not ours to reproduce: read the current version on jcq.org.uk, then type your own instructions into the notices field so they stay on screen for the whole paper.
Under an access-arrangement, the extra-time finish is displayed alongside the standard one rather than instead of it — which is why the group list holds several rows at once. In France the equivalent instructions come from the awarding authority and the académie; the French version of this page points to them.
How the finish time is worked out
A group's length is the nominal length of the paper multiplied by its allowance, rounded to the nearest minute, plus any supervised rest breaks, which are added flat. The finish time is the start time plus that length.
group length = round(length × (1 + allowance ÷ 100)) + rest breaks
finish time = start time + group length
Example: 09:00, 1 h 45 paper, 25 % extra time, 10-minute rest break
group length = round(105 × 1.25) + 10 = 141 min = 2 h 21
finish time = 09:00 + 2 h 21 = 11:21
Frequently asked questions
Click the full-screen button under the display: the browser scales the clock to the size of the screen and the digit size follows the height of the window. Escape, or the button in the top-right corner, returns to the page. On a projector, connect the video output first, then go full screen on the projected display.
Only if you ask it to. The alarm is off by default, because an exam room does not always want a sound. Tick the alarm box before starting: three short notes are then produced by the browser itself, with no audio file and no network connection, and a preview plays the moment you tick the box.
Add one group row per allowance: one for standard time, one for 25 %, one for any other percentage. Each row carries its own label and percentage, and its finish time appears under the clock. Three groups fit without scrolling, full screen included.
Yes. Once the page has loaded, the timer, the clock, the stopwatch, the alarm and the printing ask nothing more of the network. You can switch the room's Wi-Fi off without consequence. The only trade-off is that the time shown is the computer's own: no server corrects it, so check its setting before the session.
Yes, one per line, under the clock and under the finish times. Three ready-made ones are offered — phones off and in bags, no candidate may leave before a given time, rough work not collected — and you can write your own. They stay on screen in full screen mode and are carried over to the printed room sheet.
A timer counts down: you give it a length and it runs to zero, which is what a paper needs. A stopwatch counts up from zero and measures a length you do not know in advance: an oral, a practical, an individual slot. Both are here, in two tabs, with a third one for the room clock itself.
The print button builds an A4 page from what you have entered: the title of the paper, the room, the start time, the table of groups with their length and finish time, the instructions on display, and three signature rows for the invigilators. Nothing else on the page is printed.
Nothing leaves your browser. The title of the paper, the room, the instructions and the groups are kept in your browser's local storage so that you find them again at the next session, and none of it is sent to a server. Clearing the site's data erases them for good.
Other tools
And when the exam itself is online?
Evalmee times each candidate, access arrangements included, and submits the paper automatically at the right minute.