A CPR certification is a credential that proves you’ve been trained to perform cardiopulmonary resuscitation, the emergency technique used when someone’s heart stops beating or beats too weakly to circulate blood. The certification is valid for two years, after which you need to renew it. Most courses take only a few hours to complete and cover chest compressions, rescue breathing, choking response, and how to use an automated external defibrillator (AED).
What You Actually Learn
CPR training teaches you to keep oxygenated blood moving through someone’s body during cardiac arrest, which prevents brain damage and death in the minutes before paramedics arrive. Bystander CPR can double or triple a person’s chance of surviving cardiac arrest.
The core skills covered in a standard certification course include:
- Chest compressions: pressing hard and fast on the center of the chest to manually pump blood through the heart
- Rescue breaths: delivering air into the lungs between rounds of compressions
- AED use: operating the portable device that analyzes heart rhythm and delivers an electric shock if needed
- Choking response: clearing a blocked airway using an escalating approach of encouraging coughing, then back slaps, then abdominal thrusts if the other steps don’t work
- Bleeding control: applying pressure and basic wound management
There’s also a simplified version called hands-only CPR, which skips rescue breaths entirely. You call 911, send someone for an AED, and deliver continuous chest compressions until help arrives. Full CPR training builds on this with breathing techniques that apply to a wider range of emergencies.
Types of CPR Certification
Not all CPR certifications are the same. The level you need depends on your job and how much medical training you already have.
Heartsaver is the most common certification for the general public. It’s designed for people with little or no medical background who need a completion card for work, regulatory requirements like OSHA compliance, or personal preparedness. If your employer told you to “get CPR certified,” this is typically what they mean.
Basic Life Support (BLS) is open to everyone but built for healthcare workers and first responders. It covers CPR, airway management, rescue breaths, and AED use for infants, children, and adults. Nurses, EMTs, medical assistants, and dental hygienists commonly hold BLS certification.
Advanced Cardiac Life Support (ACLS) is specifically for physicians, nurses, paramedics, anesthesiologists, and other clinicians who manage complex emergencies. It builds on BLS with advanced airway techniques, IV access, and medication administration. You wouldn’t pursue ACLS unless you work in a clinical setting.
Who Issues the Certification
Two organizations dominate CPR training in the United States. The American Heart Association (AHA) publishes the official scientific guidelines for CPR and operates a nationwide network of authorized training centers and instructors. The American Red Cross is the other major provider, offering in-person, online, and blended courses across the country. Both are widely recognized by employers, schools, and regulatory agencies.
Smaller organizations also offer CPR certification, but if your employer or licensing board requires it, check whether they accept credentials from a specific provider. Many healthcare employers only recognize AHA or Red Cross cards.
Online, In-Person, or Blended
You can complete CPR training in three formats, but they’re not all equal in the eyes of regulators. In-person courses combine instruction with hands-on practice on mannequins and typically wrap up in a few hours. Blended courses split the learning into an online portion you complete at home followed by a shorter in-person skills session where you demonstrate competency.
Online-only courses exist, but they don’t meet OSHA’s workplace safety requirements. OSHA has stated explicitly that online training alone is insufficient because CPR involves physical skills that can only be learned through actual practice on mannequins and with partners. If you need the certification for a job, make sure your course includes a hands-on component with an instructor who verifies your technique.
How Long It Lasts and How to Renew
CPR certification expires after two years. When it’s time to renew, you don’t have to retake the full course. Abbreviated renewal courses are shorter than the original training and extend your certification for another two years. The key is renewing before your credential expires, since some renewal courses are only available to people whose certification is still active. If yours has already lapsed, you may need to take the full course again.
The two-year cycle isn’t arbitrary. CPR guidelines are updated periodically based on new resuscitation research, and regular recertification ensures your skills reflect current science. The 2025 international consensus guidelines, for example, introduced updated choking protocols, confirmed that CPR techniques don’t need to be modified for obese individuals, and recommended that training programs include female mannequins to better prepare rescuers for real-world scenarios.
Who Needs One
Certain jobs require CPR certification by law or employer policy. Healthcare workers, lifeguards, childcare providers, personal trainers, flight attendants, and school staff are among the most common. OSHA mandates first aid and CPR training for workplaces where employees could be exposed to specific hazards, particularly when emergency medical services aren’t close by.
Even if your job doesn’t require it, cardiac arrest can happen anywhere: at home, in a grocery store, at a park. About 70% of out-of-hospital cardiac arrests occur in residences. The person most likely to need your help is someone you know. A few hours of training and a credential that costs roughly the price of a nice dinner is a practical investment in being prepared for a moment that, statistically, most people will encounter at some point in their lives.