BLS Certification Explained

BLS certification stands for Basic Life Support certification. It is a credential that shows you have completed training in how to perform CPR (cardiopulmonary resuscitation) and use an automated external defibrillator (AED) on adults, children, and infants. The certification is issued by the American Heart Association, the organization that sets the standards for this training across the United States.

When you earn a BLS certification, you are not earning a degree or a license to practice medicine. You are demonstrating that you know the steps to perform CPR correctly and can respond to a cardiac emergency until professional medical help arrives. Many workplaces—hospitals, clinics, schools, gyms, and offices—require employees in certain roles to hold current BLS certification because these skills can save a life in the first minutes after someone collapses.

Key Takeaways

  • BLS certification proves you can perform CPR and use an AED on adults, children, and infants in a cardiac emergency.
  • The American Heart Association issues the certification after you complete a hands-on training course and pass a written test.
  • A BLS card is valid for two years from the date you pass the course, then you must renew it.
  • Many healthcare jobs, childcare positions, and fitness roles require current BLS certification as a condition of employment.
  • You can take a BLS course at hospitals, community colleges, Red Cross chapters, and training centers in your area.

What You Learn in a BLS Course

A BLS course teaches you the sequence of actions to take when you find someone unresponsive and not breathing normally. You learn how to call 911, position the person, perform chest compressions at the correct depth and speed, deliver rescue breaths, and use an AED when one is available. The course covers how to recognize signs of a heart attack or stroke and how to respond to choking in adults and children.

The training is hands-on. You practice on a mannequin under the guidance of an instructor who watches your technique and corrects your form. Most courses last between three and four hours. You will also study a workbook or watch videos that explain the science behind CPR and why each step matters. At the end, you take a written test and perform CPR on the mannequin while the instructor observes to make sure you meet the standard.

How Long BLS Certification Lasts

Your BLS certification card is valid for exactly two years from the date you pass the course. After two years, your certification expires and is no longer current. If your employer requires BLS certification, you will need to renew it before the expiration date or you may lose your job or be reassigned to a role that does not require it.

You can renew your certification by taking a renewal course, which is shorter than the initial course—usually one to two hours—because you already know the material. Some training centers also offer online renewal options where you watch a video and take a test, though you may still need to come in person to practice on a mannequin and show your technique to an instructor. Check with your employer or training center about what renewal method they accept.

Who Needs BLS Certification

Healthcare workers are the most common group required to hold BLS certification. This includes nurses, paramedics, emergency medical technicians (EMTs), physicians, dentists, and respiratory therapists. If you work in a hospital, clinic, dental office, or ambulance service, your employer will almost certainly require you to have current BLS certification before you start work.

Beyond healthcare, many other workplaces require or strongly encourage BLS certification. Childcare centers often require staff to be certified because they are responsible for children. Fitness centers and personal trainers may require it. Schools sometimes require it for coaches and physical education teachers. Some employers in non-medical fields require BLS for safety coordinators or first aid responders. Even if your job does not require it, having BLS certification can make you a stronger candidate when you are looking for work in fields where emergencies are possible.

Where to Take a BLS Course

You can take a BLS course at several types of organizations. The American Heart Association maintains a list of authorized training centers on its website where you can search by zip code. Many hospitals and health systems offer BLS courses to the public, not just their employees. Community colleges often include BLS training in their continuing education programs. The American Red Cross also offers CPR and first aid training that meets BLS standards, though the Red Cross uses slightly different terminology and course names.

The cost of a BLS course varies by location and provider. Initial courses typically cost between $50 and $150. Renewal courses cost less, usually $30 to $100. Some employers pay for their employees' BLS training as part of onboarding or professional development. If you are paying out of pocket, call ahead to ask about the price and whether the course is taught in person, online, or a combination of both.

What Happens If Your Certification Expires

If your BLS certification expires and you still need it for your job, you will need to take a renewal course as soon as possible. You cannot straightforward take another initial course and count it as a renewal—the renewal course is designed for people who already know CPR and just need to refresh their skills and update their card. Some employers will give you a grace period to renew before they take action, but others will suspend you from duties that require BLS certification when ready.

If you let your certification lapse for a long time—more than a few months—you may be required to take a full initial course instead of a renewal course, depending on your employer's policy and the training center's rules. The safest approach is to renew your certification in the month before it expires so there is no gap in your coverage.

BLS Certification vs. Other First Aid Credentials

BLS certification is different from standard first aid certification. BLS focuses specifically on CPR and AED use for cardiac emergencies. First aid certification covers a broader range of injuries and illnesses—cuts, burns, sprains, poisoning, shock, and more—but does not go as deep into CPR technique. Many employers require both: BLS certification for cardiac response and first aid certification for general workplace injuries.

Advanced Cardiac Life Support (ACLS) is a step up from BLS. ACLS is for healthcare professionals and teaches how to manage cardiac emergencies using medications and advanced equipment. You typically need BLS certification before you can take ACLS. Pediatric Advanced Life Support (PALS) is similar but focused on infants and children. If your job requires ACLS or PALS, your employer will tell you during hiring or training.

Frequently Asked Questions

Can I take a BLS course online?

Some training centers offer online modules where you watch videos and take a test, but most require you to come in person for at least part of the course to practice CPR on a mannequin and show an instructor your technique. A purely online course without hands-on practice does not meet the American Heart Association standard. Ask the training center what their format is before you register.

What if I fail the BLS test?

If you do not pass the written test or your CPR technique does not meet the standard, the instructor will tell you what you need to improve. Most training centers allow you to retake the test or practice session the same day or within a few days at no extra cost. You do not receive your certification card until you pass both parts.

Do I need to renew my BLS if I change jobs?

No. Your BLS certification is valid for two years regardless of where you work. If you move to a new job that requires BLS, you can show your current card. You only need to renew when the two-year expiration date approaches, not when you change employers.

Is BLS certification the same as CPR certification?

BLS and CPR are often used interchangeably, but technically BLS is broader—it includes CPR plus AED use and response to choking. When someone says they need "CPR certification," they usually mean BLS certification. The American Heart Association uses the term BLS for the credential.

Can I get BLS certification if I have a medical condition?

Most people can take a BLS course regardless of health status. If you have a condition that affects your ability to perform chest compressions or use an AED, talk to the training center before you register. They may be able to modify the course or discuss alternative options with you.