Box breathing timer — a free 4-4-4-4 pacer

Press start and follow the circle. This box breathing timer paces the classic 4-4-4-4 rhythm for you — in for four, hold for four, out for four, hold for four — so you can close your eyes and stop counting in your head.

Before you begin. RhythmRx is a wellness practice app, not medical advice, and this timer is not a treatment for any condition. Paced breathing suits most healthy adults, but if you have a heart or lung condition, are pregnant, or feel faint, dizzy or short of breath at any point, stop and speak to a doctor. Never practise a breathing pattern while driving or in water.

What the 4-4-4-4 box breathing pattern is

Box breathing — also called square breathing or four-square breathing — is a paced pattern with four phases of equal length. Every side of the "box" is four seconds long, which is what gives the technique its name and makes it unusually easy to remember when you are stressed and not thinking clearly. One full round takes sixteen seconds, so four rounds is a little over a minute.

The even count is the whole point. Patterns with a long exhale, such as 4-7-8, tilt you towards drowsiness. Box breathing keeps inhale and exhale balanced, so it is designed for the moments when you want to be steady and awake rather than sleepy.

How to use this timer

There is nothing to set up. The timer above runs entirely in your browser, starts the moment you press the button, and needs no account, no download and no internet connection once the page has loaded. The growing and shrinking circle is the pacer: breathe in while it expands, hold while it is still, breathe out while it shrinks. The number in the middle is the seconds left in the current phase if you prefer counting to watching.

On a phone the timer gives a very short vibration at each phase change where the device supports it, so you can lock your eyes shut and still feel the rhythm. Press the same button again to pause, and reset when you want to start a fresh count. Your round counter and elapsed time sit below the controls so you can aim for a target — four rounds to reset between tasks, twenty rounds for a five-minute practice.

When people reach for box breathing

Box breathing is the pattern people tend to use before something demanding rather than after it: a presentation, a difficult conversation, the start line of a race, a job interview, or the minute before you walk into a room you would rather avoid. It is quiet, invisible and needs no equipment, so it works at a desk, in a car park or standing in a queue.

It is also a good default if you are new to paced breathing and unsure where to start. The equal counts are forgiving, the four-second phases are comfortable for most healthy adults without practice, and the shape is easy to recall days later without a timer at all. If you would like a version you can pin to a wall, our free printable breathing card has this pattern and several others on one page.

Box breathing compared with other patterns

No single pattern is best; they simply do different jobs. Box breathing balances the breath for steady alertness. The 4-7-8 timer stretches the exhale to twice the inhale, which is the shape most people find helpful for winding down at night. The coherent breathing timer drops you to roughly five and a half breaths a minute with no holds at all, which is the pattern most often studied in heart-rate-variability research.

If holding your breath feels uncomfortable, skip the holds entirely and use coherent breathing instead — you lose nothing. A full comparison of the common techniques, what each is used for and how to choose between them lives on our guide to breathing exercises.

Making it a habit rather than a one-off

A single round of box breathing is pleasant. The practice that people report actually changes their week is a short session at the same point every day — usually attached to something they already do, like sitting down at the desk or closing the laptop. Two minutes daily beats twenty minutes once a fortnight, because the value is in the pattern becoming automatic enough to reach for when you are already rattled.

That is what the RhythmRx app is for: it guides the same patterns, keeps your streak, and lets you log how rested and focused you feel so you can see which sessions are actually earning their place. The app is free to start.

Frequently asked questions

What is a box breathing timer?

A box breathing timer is a visual pacer that counts the four equal phases of the 4-4-4-4 pattern for you: inhale for four seconds, hold for four, exhale for four, hold for four. The RhythmRx timer runs in your browser, needs no signup, and shows an expanding circle so you can practise with your eyes closed.

How long should a box breathing session be?

Most people start with four rounds, which is a little over a minute, and build towards five minutes as it becomes comfortable. There is no need to push past the point where the counts feel easy; the timer shows your round count and elapsed time so you can pick a target and stop there.

Do I have to hold my breath?

No. If the holds feel uncomfortable, or you have been told to avoid breath holding, use a pattern without them. Coherent breathing at five and a half seconds in and five and a half seconds out gives you slow paced breathing with no holds at all.

Is box breathing safe for everyone?

Paced breathing suits most healthy adults, but RhythmRx is a wellness practice app and not medical advice, and this timer is not a treatment for any condition. If you have a heart or lung condition, are pregnant, or feel faint or dizzy at any point, stop and speak to a doctor.

Does the timer work on a phone?

Yes. The page is designed for a phone screen, the timer runs client side with no account, and on devices that support it there is a short vibration at each phase change so you can follow the rhythm without looking at the screen.

All breathing exercises · Free printable card · Premium pricing