118-Hour Timer

For a countdown as long as 118 hours, the scheduled finish matters more than counting browser ticks. This timer catches its display up after a delay; keep the page open and use a dedicated backup if sound is important.

00:00

Hours Minutes Seconds

Alarm sound Volume

Tip: press Space to start or pause, R to reset, F for full screen.

In short

The 118-hour timer is a free, full-screen countdown with an alarm, pause and loop. It is preset to 118 hours (118:00:00) and ready in one click - Popular for brewing & fermenting, project deadlines and more.

Is a 118-Hour Timer the Right Length?

Best for: deadlines, sleep, events and multi-hour processes.

Choose another length for: alerts that must fire after the browser or device is closed.

Choose the 118-hour timer when the finish matters more than checking progress continuously. Pick a shorter timer for urgency, or a longer one when stopping mid-task would be disruptive.

A Sample 118 Hours Plan

Stage	Time	What to do
Prepare	708 minutes	Choose one outcome and remove distractions.
Main block	5664 minutes	Do the task without checking another clock.
Finish	708 minutes	Wrap up, save your place and decide the next step.

How to Set a Timer for 118 Hours

Starting this countdown takes one click. The clock is already set to 118:00:00. Here is the full flow, including pausing, looping and full screen.

Start with it presetNo setup needed. The clock already shows 118 hours, so you can go straight to the countdown without typing a duration.
Hit Start or tap SpacePress Start, or use the Space bar, and the countdown begins. Send it full screen for a clock you can read from anywhere in the room.
Let the saved finish time runIf you move to another tab, the display recalculates from the saved finish time when the browser updates again. Keep the page open for audio.
Break, repeat or restartTap pause when you step away and resume from the same second, turn on Loop for back-to-back rounds, or reset to run 118 hours from the top.
Listen for the finishAt zero the page flashes and attempts to play the selected alarm. Keep the tab open because a browser or device may suppress background audio.

Duration and Clock Conversion

This duration spans 424,800 seconds in total.

That's 118 hours - Long enough to bridge a full day.

However you measure it, the 118-hour countdown tracks the same span and reaches zero at the scheduled finish time. Alarm sound requires the page to remain open and the browser to permit audio.

Seconds	424,800
Minutes	7,080
Hours	118
Days	4.9167
Clock (h:mm:ss)	118:00:00

Why This Length Can Work

A 118 hours countdown set at bedtime lets you drift off without checking the clock, giving your body room for several full sleep cycles. Waking near the same hour each day keeps your circadian rhythm steady, so mornings feel less groggy. Line it up with our sleep timer.

Tip: Start the 118-hour timer right before you lie down, then set your phone across the room so you have to stand up to shut it off in the morning.

Tasks That Fit the Available Time

A 118-hour window can hold a focused, clearly bounded action. For the strategy behind it, our guide on how to run a reliable live-event countdown goes deeper. Possible uses include:

follow an extended fasting plan
watch a long event countdown
sleep a full night and wake on time
run an overnight cook or ferment

Use Cases for This Duration

This countdown is useful when its length matches the job. Consider these examples:

Brewing & fermenting

Time a long brew, proof or ferment.

Project deadlines

Watch a multi-hour countdown to a hard deadline.

Sleep & wake

Bridge a full night or a long rest and wake on cue.

Overnight cooking

Track a smoker, sous-vide or long ferment overnight.

Event countdowns

Count down to a deadline, launch or big moment.

Extended fasting

Follow a longer fasting protocol with a clear endpoint.

Running a long countdown?

How to Run a Reliable Live-Event Countdown

Counting down to a live moment? Set a target timestamp, prepare a full-screen display and use a separate backup alert for a consequential finish.

Read the guide →

Related Hour Timers

24 Hours 36 Hours 48 Hours 72 Hours 96 Hours 120 Hours

View all hour timers →

Questions About This Duration

How is the remaining time calculated?

The countdown is driven by your device clock, so its display recalculates the remaining time whenever the browser is able to update. When the page is hidden the browser may slow the on-screen updates, but the finish time is calculated from the real clock. Background alarm sound is not guaranteed.

Will it keep running overnight or if my screen sleeps?

The display catches up to the correct time when the device wakes because the finish is anchored to the real clock. Audio cannot be guaranteed while a browser or device is sleeping.

What happens if I close the browser?

Reloading the same page restores the timer from your browser's storage. Closing the tab entirely ends the countdown, so keep it open for very long timers.

What happens when the timer reaches zero?

The screen flashes and the page attempts to play the selected alarm. You can silence it with one tap. An already loaded page can produce audio without a connection, but device and browser restrictions still apply.

Do I need to install anything or sign up?

No. The timer runs in any modern browser with nothing to install and no account to create. It works the same on a phone, tablet, laptop or desktop.

Where is my timer data stored?

Only on your own device. The countdown and its settings live in your browser's local storage and never reach our servers, so what you time stays entirely yours.

Need this countdown on another page? Create an embeddable timer with your preferred title, theme and size.