How Many Breaths to Give During CPR

Everyone · Explainer · Updated October 1, 2026 · LearnLife Editorial

What is CPR and why do rescue breaths matter?

CPR, or cardiopulmonary resuscitation, is a lifesaving technique used when a person’s heart stops beating or they stop breathing normally. The goal is to keep oxygen-rich blood flowing to vital organs like the brain and heart until emergency medical help can arrive. Rescue breaths are a key part of CPR because they supply oxygen directly to the lungs. Without breaths, chest compressions alone circulate only the oxygen already in the bloodstream, which can quickly run out. This is especially important for children and infants whose cardiac arrest often starts with breathing problems.

Imagine a person suddenly collapses and stops breathing due to a heart attack. By performing CPR with rescue breaths, you provide fresh oxygen to the lungs, improving the chances that their organs survive until an ambulance arrives. Rescue breaths help maintain oxygen levels and prevent brain damage, making them an essential component of CPR for most age groups.

How do you properly give rescue breaths during CPR?

Giving rescue breaths requires opening the airway and delivering air into the lungs effectively. Start by tilting the person’s head back slightly and lifting the chin to open the airway—this is called the “head-tilt, chin-lift” maneuver. Pinch the person’s nose shut to prevent air from escaping. Then, take a normal breath, create a tight seal over their mouth with your own, and breathe in for about one second. You should see the chest rise as air fills the lungs.

For example, if you are performing CPR on an adult who is unresponsive and not breathing, after 30 chest compressions, give 2 rescue breaths. Each breath should last about one second, not too fast or forceful. If the chest does not rise, reposition the head and try again. If it still doesn’t rise, the airway might be blocked, so continue with chest compressions until help arrives.

Practicing these steps in a CPR class or with a training manikin helps develop the confidence and skill to give breaths correctly under pressure.

How many breaths and compressions should you give during CPR for different age groups?

The standard CPR cycle for adults and children over 1 year old is 30 chest compressions followed by 2 rescue breaths. For infants under 1 year, the ratio is the same (30:2), but breaths should be smaller and gentler due to their tiny lungs. When giving breaths to an infant, cover both the nose and mouth with your mouth and use light puffs of air.

Here’s a summary of the guidelines:

If you are untrained or uncomfortable giving breaths, performing hands-only CPR (continuous chest compressions without breaths) is recommended for adults. For children and infants, rescue breaths remain important because their cardiac arrest often results from breathing problems.

Why is the 30:2 breath-to-compression ratio important?

The 30:2 ratio balances circulation and oxygen delivery. Chest compressions keep blood flowing through the body, while rescue breaths supply oxygen to the lungs. Too few breaths can cause oxygen levels to drop, risking damage to organs. Too many breaths interrupt compressions and reduce blood flow.

For example, if you gave only chest compressions without breaths in a child who stopped breathing due to choking, oxygen levels would fall quickly. Conversely, if you paused compressions too long to give multiple breaths, blood wouldn’t circulate effectively. The 30 compressions followed by 2 breaths cycle was developed to optimize this balance, maximizing the chance for survival and brain function preservation.

Sticking to this ratio throughout CPR helps maintain steady oxygen supply and blood flow, which are critical for the body’s survival during cardiac arrest.

What are common terms people confuse with rescue breaths?

Many people mix up rescue breaths with other terms related to CPR and first aid. Here are some clarifications:

• Rescue breaths: Controlled breaths given during CPR to supply oxygen to the lungs, typically two breaths after every 30 compressions.
• Mouth-to-mouth resuscitation: A form of rescue breathing, sometimes used alone to help someone not breathing but with a pulse. In CPR, rescue breaths are part of the full cycle with compressions.
• Hands-only CPR: Chest compressions without rescue breaths, recommended for untrained rescuers or bystanders unwilling to give breaths.
• Ventilation: A medical term for artificially supporting breathing, often with equipment, used in hospitals and ambulances.

Understanding these distinctions helps clarify the actions you should take during CPR and reduces confusion in emergencies.

What steps should you take to perform CPR with breaths correctly?

Follow this step-by-step guide to perform CPR with rescue breaths:

1. Check the scene for safety. Make sure it’s safe to approach.
2. Check responsiveness. Tap the person and shout to see if they respond.
3. Call 911 or ask someone else to call.
4. Check breathing. Look for normal breathing for no more than 10 seconds.
5. Begin chest compressions. Place hands in the center of the chest and push hard and fast—about 2 inches deep for adults, at a rate of 100-120 compressions per minute.
6. Give 2 rescue breaths. Open the airway with the head-tilt, chin-lift method, pinch the nose, and give a breath lasting 1 second with visible chest rise.
7. Repeat cycles. Continue 30 compressions and 2 breaths until help arrives or the person starts breathing.

Using exact wording can help in emergencies:

• “I’m going to give two breaths now.”
• “Pinching your nose and tilting your head back.”
• “Breath in... and breath out.”

Clear communication helps calm the situation and keeps your actions organized.

How to practice rescue breaths safely and confidently?

Learning CPR in a class with certified instructors is the best way to gain hands-on experience. During training, you’ll practice rescue breaths on manikins designed to simulate real breathing. Here are tips for practicing breaths:

• Always use the head-tilt, chin-lift method to open the airway before giving breaths.
• Pinch the nose tightly to prevent air from escaping.
• Give slow, gentle breaths lasting about 1 second each.
• Watch for visible chest rise to confirm air is entering the lungs.
• If the chest doesn’t rise, reposition the head and try again.
• Avoid blowing too forcefully, which can cause air to enter the stomach and lead to vomiting.

Repeated practice builds muscle memory and confidence, so you can perform rescue breaths correctly in an emergency. Many local community centers and health organizations offer CPR certification courses.

When might you skip rescue breaths and perform hands-only CPR?

If you are untrained in rescue breathing or uncomfortable giving breaths, performing hands-only CPR is recommended for adult victims. This means continuous chest compressions at a rate of about 100-120 per minute without pausing for breaths. Hands-only CPR keeps blood flowing and is easier for bystanders to perform.

However, rescue breaths are especially important for:

• Children and infants, because many cardiac arrests in these groups start with breathing problems.
• Victims of drowning, drug overdose, or choking, where oxygen deprivation is the cause.

If you cannot give breaths, at least provide continuous compressions and call emergency services immediately. Remember, some CPR is better than none.

Frequently asked questions

How long should each rescue breath last during CPR?

Each rescue breath should last about one second, just enough to make the chest visibly rise. Avoid quick or forceful breaths to prevent air from entering the stomach.

Can CPR be effective without giving rescue breaths?

Hands-only CPR, which involves only chest compressions, is effective for adults if you cannot or do not want to give breaths. However, rescue breaths are important for children, infants, and cases involving breathing problems.

How do I know if my rescue breaths are working?

You’ll know your breaths are effective if the person’s chest rises visibly with each breath. If the chest does not rise, reposition the head and try again, as an airway blockage may be preventing air entry.

What should I do if I forget the number of breaths to give?

Remember the 30:2 ratio—30 chest compressions followed by 2 rescue breaths. If unsure, continuous chest compressions are better than stopping CPR to think.

Is it necessary to give rescue breaths if an AED is available?

Yes, rescue breaths complement chest compressions and AED use. The AED delivers shocks to restore heart rhythm but does not provide oxygen, so breaths remain essential.