4-7-8 Breathing Timer: for Sleep & Anxiety
4-7-8 breathing is a relaxation technique: inhale through your nose for 4 seconds, hold for 7, exhale through your mouth for 8. Developed by Dr. Andrew Weil from yogic pranayama, the long hold and extended exhale activate the parasympathetic nervous system — most people feel calmer within 2–3 cycles. Try the free guided timer below.
4-7-8 Calm
Deep relaxation. Tap to begin your breathing exercise.
The pattern: Inhale 4s → Hold 7s → Exhale 8s
Press Start and the animated dandelion breathes with you — it grows as you inhale and releases its seeds as you exhale. No signup, no download, no ads.
What is 4-7-8 breathing?
Dr. Andrew Weil, who popularized the technique, calls 4-7-8 breathing a "natural tranquilizer for the nervous system." It's based on pranayama, the breath-regulation practice from yoga, and its power comes from the asymmetry: the exhale is twice as long as the inhale, and the 7-second hold lets CO₂ build slightly before the long release.
Extended exhalation is the most reliable trigger of the body's relaxation response. When the exhale outlasts the inhale, the vagus nerve signals the heart to slow — a mechanism called respiratory sinus arrhythmia. Reviews of slow-breathing research consistently find that exhale-weighted patterns lower heart rate, blood pressure, and self-reported anxiety.
Because it's genuinely sedating, 4-7-8 is the wrong tool for moments when you need to stay sharp — that's box breathing's territory. Where 4-7-8 shines is the wind-down: the racing mind at bedtime, the anxious re-run of tomorrow's conversation, the 3am wake-up.
When to use it
- →Falling asleep: The classic use. 3–4 cycles in bed signals your brain it's safe to power down. Many people don't remember finishing the fourth cycle.
- →Calming pre-event anxiety: Before a flight, an appointment, or a difficult conversation — when you have a few minutes and don't need to stay razor-sharp afterward.
- →A wind-down ritual: Paired with journaling or reading, 4-7-8 marks a boundary between the day's noise and your evening.
- →Waking at 3am: The long exhale interrupts the cortisol-driven alertness loop that keeps you staring at the ceiling.
How to do it — step by step
- 1Get comfortable: Sit with your back supported or lie down. Rest the tip of your tongue behind your upper front teeth (the traditional pranayama position).
- 2Exhale completely: Empty your lungs through your mouth with a gentle whoosh sound.
- 3Inhale for 4 seconds: Breathe in quietly through your nose.
- 4Hold for 7 seconds: The hold feels long at first — that's normal. If it's uncomfortable, shorten the whole ratio (2-3.5-4) rather than skipping the hold.
- 5Exhale for 8 seconds: Release completely through your mouth, slowly, with the same gentle whoosh. This is where the calm happens.
- 6Repeat for 3–4 cycles: One cycle takes 19 seconds; a full session is under 90 seconds. Beginners should stop at 4 cycles per session.
Frequently asked questions
How many cycles of 4-7-8 breathing should I do?
Start with 3–4 cycles per session — Dr. Weil recommends not exceeding 4 cycles as a beginner, since the long holds can cause light-headedness. With practice you can extend to 8 cycles. Twice daily practice builds the effect over weeks.
Does 4-7-8 breathing really help you fall asleep?
The extended exhale activates the parasympathetic nervous system and slows heart rate — the physiological preconditions for sleep onset. Controlled-breathing studies report reduced sleep latency and anxiety, and the technique is widely recommended in clinical sleep hygiene. It's an aid, not a sedative: it works best as a consistent pre-sleep ritual.
The 7-second hold feels too long. Am I doing it wrong?
No — the hold is the hardest part for beginners. Keep the 4:7:8 ratio but shorten the counts (for example 2 : 3.5 : 4 seconds) and build up. If holds are uncomfortable for medical reasons, try the gentler 4-2-6 Deep Calm pattern instead — it's also in the free timer.
More than a timer
Reflect includes all 10 guided breathing exercises free — no signup needed to use this timer. If you ever want a calm, private place to write after you breathe, the journal is free too. No streaks, no ads, and we never train AI on your entries.