TimerPlan
31 free timers and clocks
Every timer, clock and time calculator here
Four groups: the timers that count down to zero, the stopwatch and tempo tools that count up, the calculators that do arithmetic on the clock, and the clocks and full-screen colour panels. The plans and logs at the end keep what you set up.
Timers & countdowns
Online timer
Set a length, press start — it rings even from a background tab.
Classroom timer
Readable from the back row, with the sound off.
Countdown timer
Counts to 3:00 pm, not for twenty minutes.
Interval timer
Work, rest, rounds — advancing on their own.
Kitchen timer
Pasta, oven and tea at once — each rings for itself.
Pomodoro timer
25 on, 5 off — and it counts the rounds.
Sleep timer
A quiet countdown that ends in darkness.
Stopwatch & tempo
BPM counter (tap tempo)
Tap the beat, read the tempo — median, not average.
Online chess clock
Blitz, rapid or classical — with a real increment.
Count up timer
Counts up, with a target to fill.
Online metronome
Steady because the clicks are scheduled, not fired.
Online alarm clock
Rings from a background tab — and says when it can't.
Online stopwatch
Laps, splits, fastest and average — on the keyboard.
Time calculators
Hours calculator
Hours worked, in h:mm and decimal at once.
Military time converter
1830 both ways, with how it is spoken.
Seconds to minutes converter
Every time unit at once, including hh:mm:ss.
Time calculator
Add or subtract a length from a time of day.
Time card calculator
A week of shifts, with overtime split at forty.
Time duration calculator
The gap between two times, in five forms.
Clocks & screen
Black screen
Shows every smear a bright screen hides.
Full screen clock
Digital and analogue, big enough to read across a room.
Green screen
Chroma green at #00B140, and blue when green is in shot.
Time zone converter
This time here, that time there — and which day.
White screen
A monitor used as a lamp — warm, daylight or cool.
World clock
Local time, date and whether they're awake.
Time plans & logs Pro
Interval and HIIT Plan
Build a session out of work and rest intervals with a round count, and see the total length before you start rather than fifteen minutes into it.
Lesson and Station Rotation
Lay out a carousel of stations with a length each, add the changeover time, and see whether the whole rotation fits the period before the class is halfway through it.
Meeting Agenda Timer
Give each agenda item its minutes and see the running total against the length of the meeting — before the meeting, which is the only time it can be fixed.
Study Session Log
Log sessions as they happen and see the real total: how many, how long each, and the hours that add up over a week rather than the ones you meant to do.
Weekly Timesheet Log
A week of shifts kept as a record rather than recalculated from memory: hours per day less breaks, the weekly total in decimal, and what falls past forty.
World Meeting Planner
Enter each person's working hours in UTC and see the window where they overlap — the only hours a meeting can actually happen.
What makes a browser timer reliable?
The TimerPlan timer stays right because it reads the clock instead of counting ticks: at the moment you press start it stores the exact time it should finish, and every redraw is the difference between now and that instant. A timer built the other way — adding a second on every tick — falls behind whenever the browser throttles a background tab, which it always does.
The alarm is scheduled the same way. The tone is booked into the audio clock the instant you press start, so it sounds at the right moment even if the tab has been frozen since. Sound built on an audio file, the usual approach, simply does not play in that state.
While a timer runs the page holds a screen wake lock, so a phone left on the counter does not go dark, and the time left is written into the tab title and drawn into the tab icon.
Set the length in the box, or take one of the buttons under it. The timer accepts the way people
actually write durations — 5m, 90s, 1h 30m, 5:30 — and the address bar carries whatever you
set, so a link like ?t=25m&auto=1 opens this page already counting.
| If you want | Use | Why that one |
|---|---|---|
| One length, once | The timer above | Presets, keyboard control, full screen |
| Several at once, named | Kitchen timer | Pasta and the oven, each ringing for itself |
| Work and break, repeating | Pomodoro timer | Cycles and a round count, not one length |
| A time of day, not a length | Countdown timer | Counts to 3:00 pm, rolling to tomorrow if it has passed |
| To count up instead | Stopwatch | Laps, splits, fastest and average |
| The room to see it | Classroom timer | Colour thresholds that read from the back with the sound off |
A timer is the only tool here that has to survive being ignored, so the parts people never see are the ones that got the attention: the finish time is absolute, the alarm is booked in advance, the screen is held awake, and the count is in the tab title for when this page is not the one you are looking at. What that adds up to in numbers is on the timer accuracy page, which is our own measurement rather than a claim.
Frequently asked questions
Does the timer keep running if I switch tabs or lock my phone?
Yes, and it stays accurate. The finish time is stored as a real clock time, so a tab that gets frozen in the background catches up the instant it is drawn again rather than losing the time it was away. The alarm is booked into the audio clock at the moment you press start, which is why it still sounds from a background tab. Locking a phone is the one case a web page cannot fully control: while the timer runs this page asks the browser for a screen wake lock, which stops the display sleeping on its own, but a manual lock suspends the tab and the sound waits until the screen is on again.
Why did my browser timer not ring?
Almost always because the sound was never allowed to start. Browsers block audio until a page has had a genuine click, so a timer that only creates its sound when the time runs out finds itself muted, and a tab that has been in the background for a while is frozen and never gets to that line of code at all. Pressing start here does both things at once: it unlocks audio and books the tone for a fixed moment in the future. If you still hear nothing, check that the tab is not muted from its right-click menu and that your system output is the device you are listening to.
Can I run more than one timer at the same time?
Yes — the kitchen timer page holds as many as you like, each with its own name and its own alarm, all in one tab. That is deliberately the one thing the search engine’s own timer widget cannot do: it holds a single countdown, so pasta and the oven need two browser tabs and two pieces of attention. Here they sit in one list, and each one rings for itself.
Does the countdown drift over an hour?
Not measurably, because nothing is accumulated. The page keeps one absolute finish time and every frame simply subtracts, so an hour spent in a background tab, asleep, or on another app changes nothing about when the timer ends. Our own measurements are on the timer accuracy page, together with what happens to timers that are built by adding up ticks — those lose seconds to minutes in the same conditions.
Is anything installed, uploaded or stored?
No. Every tool on this site runs inside the browser tab: no download, no account, no upload, and no request while a timer runs. Settings you change travel in the address bar, so a link carries them for you, and nothing is written to your device. That also means a timer lives in the tab — closing it ends the countdown, which is the honest trade for not asking to install anything.
One thing a month worth timing
MonthlyOne thing a month worth measuring or capping with a clock — a payroll trap, a nap length, a meeting that never gets added up. Two sentences and the tool.
How this works
Sources: