The rate is 100 to 120 chest compressions per minute for a child in cardiac arrest — the same rate you'd use for an adult, and the same rate the American Heart Association has taught since its 2015 guideline update. The number comes from the AHA's Guidelines for CPR and Emergency Cardiovascular Care, and it reflects a physiological reality: below 100, the heart doesn't get enough pumping cycles to sustain blood pressure; above 120, the heart doesn't have time to refill between squeezes. The rate is not a suggestion — it's the difference between circulating blood and just pressing on a chest.
For a child specifically, though, rate is only one of four variables that matter. Depth, ratio, hand placement, and recoil work together, and getting the rate right while getting depth wrong still fails the child. What follows is a practical breakdown of all four, with the numbers the AHA, the European Resuscitation Council, and the UK's Resuscitation Council publish — and the places where those bodies disagree.
What "100 to 120 per Minute" Actually Sounds Like When You're Kneeling on a Floor
The most useful mental model is a song. The Bee Gees' "Stayin' Alive" runs at 103 beats per minute. Queen's "Another One Bites the Dust" sits at 110. The theme from Baywatch is 120. If you can hum one of those while compressing, you're inside the window.
The AHA's official instructor guidance names these songs in training materials because counting aloud while doing compressions is unreliable. People tend to count faster when they're panicking, and a rescuer who thinks they're doing 100 per minute is often doing 130. A song gives you an external metronome.
Here's the arithmetic the songs don't make obvious: at 110 compressions per minute, one compression every 0.545 seconds. That's a half-second push and a half-second release, roughly. If you're pausing to breathe, reposition, or check your phone, you're no longer doing compressions — and the timer keeps running.
Actual rate counting matters during two-rescuer CPR swaps. The rescuer rotating in needs to pick up the rhythm within a second or two, and the rescuer rotating out should finish their compression at the beat the incoming rescuer takes over. The AHA recommends swapping every two minutes (about five cycles of 30:2) to prevent fatigue-driven rate decay. A tired rescuer slows to 80 or 90 within about three minutes, which is why the two-minute swap exists. If you're solo, you don't swap — you keep going until EMS arrives or you physically cannot continue.
Why the Ceiling Exists: What Above 120 Compressions per Minute Does to a Child's Heart
The 100 floor is intuitive. The 120 ceiling is not, and it's the part most laypeople — and plenty of trained healthcare providers — ignore.
Above 120 compressions per minute, the ventricles don't have adequate time to fill during diastole. Blood return to the heart drops, which means the next compression ejects less volume. The net effect is counterintuitive: faster compressions, less cardiac output. Animal studies going back to the 1990s, cited in the AHA's 2015 guideline review, showed that compression rates above 120 per minute were associated with significantly reduced coronary perfusion pressure. The heart muscle itself needs blood flow between beats, and squeezing too fast starves it.
There's also a mechanical failure mode specific to children. A child's chest wall is compliant — more flexible than an adult's. At high rates, rescuers tend to let the chest recoil less completely, because the rhythm feels frantic and full recoil takes an extra fraction of a second. Incomplete recoil raises intrathoracic pressure, which reduces venous return. So high rate and incomplete recoil compound each other.
The practical implication: if you're counting a song at 110 bpm and you drift faster, you don't get partial credit for speed. You get worse CPR. The ceiling is a real clinical boundary, not a training-scenario formality. Rescuers should err toward the middle of the range — 105 to 115 — where both rate and recoil are sustainable.
Depth, Ratio, and Hand Position: The Three Variables That Travel With Rate
Rate is the headline number, but the AHA's 2020 guidelines for pediatric CPR specify four parameters that must be correct simultaneously. Getting the rate right while missing depth by a centimeter produces a rate that doesn't matter.
| Parameter | Standard for a Child (1 year to puberty) | Common Error |
|---|---|---|
| Compression rate | 100–120 per minute | Drifting above 120 |
| Compression depth | At least one-third the AP chest diameter, roughly 5 cm (2 inches) | Pressing too shallow out of fear of injury |
| Compression-to-ventilation ratio (single rescuer) | 30:2 | Stopping compressions too long for breaths |
| Compression-to-ventilation ratio (two rescuers) | 15:2 | Using 30:2 when a second rescuer is present |
| Hand position | One or two hands on the lower half of the sternum | Hands too low (xiphoid) or too high |
| Recoil | Full chest recoil between compressions | Leaning on the chest |
The 15:2 ratio for two rescuers is the AHA pediatric-specific rule and it diverges from adult CPR, which uses 30:2 regardless of rescuer count. This is a frequent point of confusion in mixed-age households and in lay rescuer training that defaults to adult protocols. For a child, two rescuers should use 15:2 — the child's oxygen demand and the frequency of respiratory causes in pediatric arrest justify more ventilation per compression cycle.
Depth deserves its own sentence of warning. For a child, "at least one-third of the chest" typically translates to about 5 cm (2 inches) with one hand or two. For an infant under one year, it's about 4 cm (1.5 inches) with two fingers or two thumbs. For an adolescent who has reached puberty, the adult standard applies: 5 to 6 cm. The transition age is puberty, not a birthday — this is the AHA's criterion, and it's why a tall 11-year-old might be treated as an adult and a small 13-year-old as a child.
30:2 or 15:2? A Pediatric Ratio Rule That Depends on How Many Rescuers Are Present
Single rescuer, child: 30 compressions, then 2 breaths. Two rescuers, child: 15 compressions, then 2 breaths. That's the AHA 2020 pediatric basic life support algorithm, and it's the practical translation of a deeper principle — children more often arrest from hypoxia (respiratory failure, drowning, choking, smoke inhalation) than from primary cardiac causes, so ventilation carries proportionally more weight.
The 15:2 ratio exists because a single rescuer can't effectively do coordinated compressions and ventilations alone. With two, one rescuer can maintain a tight seal and deliver breaths faster, so you can afford a lower compression count per cycle. The cycle time stays roughly the same — about 15 seconds per cycle — so the total interruptions to chest compressions are similar.
A wrinkle worth naming: the European Resuscitation Council's 2021 guidelines keep the same 15:2 pediatric ratio and 100–120 rate, but healthcare-provider algorithms in some European systems emphasize continuous compressions with asynchronous ventilations once an advanced airway is in place (one breath every 2 to 3 seconds, compressions uninterrupted). The AHA adopts the same asynchronous approach after advanced airway placement. So the 15:2 ratio applies to the initial, bag-mask or mouth-to-mouth phase — not to the intubated phase.
One more trap: after 30 compressions, the two rescue breaths should each take about one second, and the compression pause should be under 10 seconds total. If you're fumbling with a bag-mask seal and the pause stretches to 15 or 20 seconds, you've negated the benefit of the compression cycle. Practice the transition, not just the compressions.
The Difference Between AHA and ERC Pediatric Rate Guidance — and Why It's Smaller Than It Looks
The AHA, the European Resuscitation Council, and the UK Resuscitation Council have converged on the same rate (100–120), the same depth (one-third AP diameter), and the same pediatric ratio (15:2 with two rescuers, 30:2 with one) over the past decade. The convergence stems from the International Liaison Committee on Resuscitation's consensus process, which harmonizes the guidelines every five years.
The one meaningful regional variation is the timing of the first breath sequence. AHA guidelines specify compressions first (C-A-B) for all ages, including children. The ERC and UK RC teach the same C-A-B sequence for lay rescuers, but some European pediatric advanced life support courses retain a modified A-B-C emphasis for witnessed pediatric arrest where the likely cause is respiratory — an approach that can be read as a divergence even though the compression rate and ratio are unchanged.
For a lay rescuer, the practical takeaway is that the rate, depth, and ratio numbers are the same in the US, UK, and EU. If you're following an AHA course in Ohio or an ERC course in Manchester, the compression rate you'll be tested on is identical. The differences live in provider-level algorithms and drug protocols, not in the basic numbers a bystander uses.
How Fast Rescue Breathing and Defibrillation Interrupt Your Rate
Even perfect compressions at 110 per minute are useless if you stop for 20 seconds every cycle. The AHA's quality metrics for CPR target a chest compression fraction above 60% (some systems target 80%) — meaning the percentage of total resuscitation time spent actively compressing. A chest compression fraction of 60% on a 12-minute resuscitation means roughly 7 minutes of compressions and 5 minutes of hands-off time. That's a lot of hands-off time.
Two specific interruptions are common and correctable:
Cycle transitions. Going from compressions to breaths should take under 10 seconds, including the breath delivery. If you're counting the pause out loud in training, that's why — instructors use "ten-one-thousand" as the cutoff. AED pad placement. If a defibrillator is available, apply pads while compressions continue, and pause only for the rhythm analysis and shock. Each shock pause should last no more than 5 seconds. For a child, use pediatric pads or an attenuator if available; if not, an adult AED can be used with adult pads positioned so they don't touch each other.
Rate and interruptions interact in a way that's underappreciated. A rescuer doing 100 per minute with 30-second pauses delivers far fewer effective compressions per minute of arrest than a rescuer doing 110 with 8-second pauses. The AHA's emphasis on chest compression fraction is a recognition that average rate across the whole resuscitation matters more than instantaneous rate.
Compression-Only CPR for a Child: When Skipping Breaths Is and Isn't Acceptable
Compression-only CPR (hands-only) is a legitimate approach for adult sudden cardiac arrest, and the AHA endorses it for untrained bystanders or trained bystanders who are unwilling or unable to deliver breaths. For a child, the answer is more cautious.
The AHA 2020 guidelines say that for pediatric arrest, compression-only CPR may be considered if the rescuer is unwilling or unable to provide ventilation. But they stop short of recommending it as equivalent. The reason is the cause of arrest: pediatric arrest is disproportionately asphyxial (drowning, foreign-body airway obstruction, suffocation, respiratory illness), and in an asphyxial arrest, circulating deoxygenated blood doesn't fix the problem. Ventilation is what restores oxygen.
If you're alone with a child, have no barrier device or training, and are unwilling to give mouth-to-mouth, compression-only at 100–120 per minute is vastly better than nothing and you should do it without hesitation. If you have a barrier or are trained, deliver breaths at 30:2. If a second trained rescuer arrives, switch to 15:2. The rate never changes across these scenarios.
The Resuscitation Council UK takes a similar position and adds a specific note on drowning: for a child pulled from water, ventilation should start as soon as possible, ideally with five rescue breaths before compressions, because hypoxia is the proximate cause. If you're on a beach or poolside, that five-breath sequence is worth knowing before the compression rate even becomes relevant.
Rate Drift: Why Rescuers Slow Down and How Two-Minute Rotation Fixes It
Fatigue causes rate decay in a predictable pattern. Studies of CPR quality during actual resuscitations, summarized in AHA science advisories, consistently show compression rate and depth falling below target after roughly two minutes of continuous single-rescuer compressions. The decline is steeper in smaller rescuers and in rescuers compressing on a soft surface (a mattress, which is why the AHA recommends moving the child to the floor or using a backboard).
The two-minute rotation is the standard mitigation. It works by designating a swap moment that doesn't depend on the rescuer admitting fatigue — because rescuers reliably underestimate their own fatigue. If you wait until you feel tired, you've already been delivering substandard compressions for 30 to 60 seconds.
For a solo rescuer, the swap isn't available. The practical fallback is to check your own rhythm against a song, keep your elbows locked, and accept that your rate will drift — then correct back toward 110 when you notice. If another bystander is present but untrained, you can talk them through compressions and swap every two minutes; a coached untrained rescuer often maintains better rate than an exhausted trained one. That's a judgment call, but it's the one the AHA's emphasis on compression fraction implicitly endorses.
Frequently Asked Questions
Is the compression rate for a child the same as for an adult?
Yes — 100 to 120 per minute for both. The rate doesn't change by age. What changes is depth (about 5 cm for a child versus 5–6 cm for an adult), rescuer ratio (15:2 for a child with two rescuers versus 30:2 for an adult), and hand technique. Many people assume children need faster compressions because they have faster resting heart rates; that's a misconception. The compression rate reflects the mechanics of cardiac output during arrest, not the patient's normal pulse.
What happens if I do compressions at 140 per minute?
Cardiac output falls, not rises. Above 120 per minute, the ventricles don't refill adequately between compressions, so each squeeze ejects less blood. The AHA's 2015 guideline review cited animal data showing reduced coronary perfusion pressure at rates above 120. In practice, rescuers who go too fast also tend to under-recoil the chest, compounding the problem. If you notice you're rushing, slow to the tempo of "Stayin' Alive" and let the chest come all the way back up.
Do I give two breaths or one breath for a child during CPR?
Two breaths, each about one second long, after every 30 compressions (single rescuer) or every 15 compressions (two rescuers). The two-breath sequence should take under 10 seconds total including the transition. If you see the chest rise, the breath was adequate — don't overinflate, because excess volume increases intrathoracic pressure and reduces blood return to the heart.
How do I know if I'm pressing deep enough on a child?
Aim for at least one-third of the chest's front-to-back diameter — roughly 5 cm (2 inches) for most children, and about 4 cm (1.5 inches) for an infant under one year. The AHA's practical cue is to press until you feel the chest give, then release fully. If you're trained and unsure, err slightly deeper rather than shallower; shallow compressions are a more common and more harmful error than slightly-too-deep ones in pediatric CPR.
What if I'm alone and don't want to give mouth-to-mouth?
Do compression-only CPR at 100–120 per minute. The AHA considers compression-only CPR acceptable for a child when the rescuer is unwilling or unable to ventilate, though it's less effective than full CPR when the arrest is caused by hypoxia — drowning, choking, or respiratory failure. Call emergency services first, put the phone on speaker, and start compressions. Don't spend time searching for a barrier device if it delays compressions by more than a few seconds.
Does an AED change the compression rate for a child?
No. The rate stays 100–120 per minute throughout, including after a shock. What changes is the pause: keep the pre-shock pause under 5 seconds and resume compressions immediately after the shock. Use pediatric pads or an attenuator for a child under 8 if available; if not, adult pads work if positioned so they don't touch. The AED's voice prompts will guide you, but it won't tell you the rate — that's on you.
How many cycles of 30:2 should I complete before checking for a pulse?
Don't stop to check a pulse unless you see obvious signs of life — movement, breathing, or a response. The AHA removed routine pulse checks for lay rescuers because they waste time and are unreliable. Complete five cycles (about two minutes) and then reassess only if the child shows signs of recovery or an AED arrives. For a child, rechecking breathing and responsiveness every two minutes is reasonable, but keep the pause under 10 seconds.
This article is general educational information about CPR technique and is not a diagnosis, treatment plan, or substitute for a certified CPR course. Compression rate, depth, and ratio guidance varies by the governing resuscitation council in your country, and individual circumstances — the child's age, size, cause of arrest, and rescuer training — affect what's appropriate. Take a hands-on course from the American Heart Association, the European Resuscitation Council, or the Resuscitation Council UK, and consult a qualified healthcare professional for any specific medical concern. In an emergency, call your local emergency number immediately; for anyone at risk of self-harm, contact local crisis services.