CPR Compression Rate and Depth: The Numbers That Matter
AHA guidelines call for 100–120 compressions per minute, at least 2 inches deep (5 cm) in adults, with full chest recoil between compressions and interruptions kept under 10 seconds. Caring People Rescue offers in-person and blended CPR courses if you're ready to certify.
- Rate: 100–120 compressions per minute
- Depth (adult): at least 2 inches; not more than 2.4 inches
- Depth (child): about 2 inches (one-third chest depth)
- Depth (infant): about 1.5 inches
Why the rate range matters
Below 100/min, you don't generate enough flow. Above 120/min, the heart doesn't fully refill between compressions. The 'Stayin' Alive' tempo (103 BPM) hits the sweet spot.
Full recoil is non-negotiable
Leaning on the chest between compressions prevents the heart from refilling. Lift your hands fully without losing position.
Prefer learning hands-on? Caring People Rescue runs in-person and blended cpr compression rate and depth classes with certified instructors — visit www.caringpeoplerescue.com to reserve a seat.
Compression fraction
Aim for compressions during at least 60% of total CPR time. Plan pauses (rhythm checks, AED analysis, intubation) to be as short as possible.
Frequently asked questions
- How do I keep pace at 100–120 BPM?
- Sing 'Stayin' Alive' (103 BPM) or use a metronome app.
- Is 2 inches too deep?
- No — adult guidelines explicitly require at least 2 inches. Going past 2.4 inches increases injury without improving outcomes.
- What if I can't push that hard?
- Switch rescuers every 2 minutes. Fatigue silently reduces depth even when rescuers feel fine.