Passing MEPS means clearing five steps in one to two days: an aptitude test, a medical examination, a job search with a guidance counselor, a background screening, and the final oath of enlistment. Most people who fail get tripped up by the medical exam or the drug test, and both are avoidable with the right preparation. Here’s what each step involves and how to walk in ready.
What Happens at MEPS, Start to Finish
If you live far from your MEPS location, the military covers a hotel stay the night before. The day starts early with breakfast and a briefing. From there, you move through the process in a set order: aptitude testing (if you haven’t already taken the ASVAB), a full medical evaluation, a sit-down with a guidance counselor to pick your career field, fingerprinting and a background interview, and finally your enlistment contract and oath ceremony. Family members are welcome to attend the oath at the end.
The whole thing takes most of the day, sometimes stretching into a second day. You don’t control the pace, so expect a lot of waiting between stations. Bring patience and nothing else that could complicate the process.
The ASVAB and Minimum Scores
The Armed Services Vocational Aptitude Battery is a multiple-choice test covering math, reading, science, and mechanical reasoning. Your overall score is reported as an AFQT (Armed Forces Qualification Test) percentile, which determines whether you qualify to enlist at all. As of 2025, every branch requires a minimum AFQT score of 31, including the Army, Navy, Air Force, Marines, Coast Guard, and National Guard.
A 31 gets you in the door, but it won’t open many career fields. Higher scores unlock more and better job options, especially in technical fields like intelligence, aviation, or cybersecurity. If you’re rusty on algebra or reading comprehension, free ASVAB practice tests are widely available online and through your recruiter. Many applicants take the ASVAB at a separate appointment before their MEPS day, which removes one source of stress.
The Medical Exam
The medical evaluation is the part that disqualifies the most people, and it covers a lot of ground. You’ll go through height and weight measurements, a hearing test, a vision exam, urine and blood tests, a drug and alcohol screening, and a physical movement evaluation where you perform exercises testing your balance, joints, and muscle groups. A doctor will also review your medical history questionnaire in detail.
Body Composition
The military recently shifted away from traditional height-and-weight charts. Instead, body composition is now evaluated using your waist-to-height ratio (WHtR). You need a WHtR below 0.55 to pass outright. If yours is 0.55 or above, you’ll be measured for body fat percentage. The maximum allowable body fat is 18 percent for men and 26 percent for women.
To calculate your own WHtR, divide your waist circumference in inches by your height in inches. If you’re 70 inches tall, your waist needs to be under 38.5 inches. If you’re close to the line, losing even an inch off your waist in the weeks before MEPS can make the difference.
Vision Requirements
Your corrected vision (with glasses or contacts) must reach 20/20 in each eye. If you wear glasses, your uncorrected vision also has limits. You need at least 20/40 in one eye with no worse than 20/70 in the other, or 20/30 in one eye with no worse than 20/100 in the other, or 20/20 in one eye with no worse than 20/400 in the other. If you’ve worn soft contact lenses for more than six months without problems, there are no uncorrected distance requirements.
Bring your current glasses or contacts, and if you have a recent prescription from your eye doctor, bring that too. Color vision is also tested, though not all jobs require perfect color vision.
Hearing Requirements
The hearing test takes place in a soundproof booth. You’ll listen for tones at various frequencies and press a button when you hear them. Your average hearing level across the key frequencies (500, 1000, 2000, and 3000 Hz) must be 25 decibels or better in each ear. The difference between your ears also matters: too large a gap between your better and weaker ear can be disqualifying even if both individually fall within range.
If you regularly use earbuds at high volume or work in loud environments, consider giving your ears a break for a few days before your appointment. Temporary noise exposure can shift your thresholds just enough to cause problems.
The Drug Test
You’ll provide a urine sample that’s screened for marijuana, cocaine, opioids (including prescription painkillers like hydrocodone and oxycodone), amphetamines (including MDMA), PCP, and heroin. The initial screening uses standard federal cutoff levels, and any positive result goes through a second, more sensitive confirmation test.
A positive drug test at MEPS is not just a failed appointment. It goes into a permanent federal database, and depending on the substance, you may be permanently barred from enlisting or face a lengthy waiting period with a required waiver. There is no “I didn’t know” exception.
Over-the-counter supplements and certain foods won’t cause a positive result at the cutoff levels used, despite what internet forums claim. Hemp-derived CBD products are the one genuine gray area, as some contain enough THC to trigger a positive. Stop using any CBD or hemp products well in advance. If you take prescription medications like Adderall or painkillers, bring your prescription documentation and disclose them on your medical questionnaire.
Your Medical History
You’ll fill out a detailed medical questionnaire covering past surgeries, hospitalizations, mental health treatment, prescription medications, and chronic conditions. The MEPS doctor reviews this and asks follow-up questions. Be honest. MEPS now has access to electronic health record systems and pharmacy databases that can surface your prescription history, so claiming you’ve never taken a medication that’s in your records will create a bigger problem than the medication itself would have.
Many conditions that people assume are automatic disqualifiers, like past depression, ADHD, or asthma, are waivable depending on severity and how long ago you were treated. Your recruiter can help you gather the right medical documentation to support a waiver request before you even arrive at MEPS. Lying about your history and getting caught, on the other hand, is a fraudulent enlistment issue that can follow you for years.
The Physical Movement Evaluation
This isn’t a fitness test, but it does require you to demonstrate basic range of motion and physical capability. You’ll perform exercises like duck-walking, bending, squatting, and various joint maneuvers while a doctor watches for signs of pain, instability, or limited mobility. If you have an old injury that limits your movement, this is where it shows up.
You’ll do these exercises in your underwear with a group of other applicants. It’s awkward, it’s quick, and the doctor is watching your joints and spine, not judging your physique. If something hurts during a movement, don’t try to push through it silently. The doctor will notice, and hiding pain raises more red flags than explaining an old ankle sprain.
The Background Screening and Interview
After the medical portion, you’ll be fingerprinted and sit for a Pre-Enlistment Interview. The interviewer asks about your criminal history, drug use, financial situation, and anything else that could affect your eligibility. This is a formal interview that feeds into your background check, so your answers need to match what you’ve told your recruiter and what’s on your paperwork.
Minor past offenses don’t automatically disqualify you, but undisclosed ones can. If you have a juvenile record, traffic violations, or past legal trouble, discuss it with your recruiter beforehand so the right documentation and waivers are already in motion.
How to Prepare in the Days Before
Most of what determines whether you pass MEPS happens in the weeks and months before you show up. But the final few days still matter.
- Sleep well the night before. Fatigue affects your hearing test, your blood pressure reading, and your ability to focus on the ASVAB if you’re taking it that day.
- Stay hydrated but don’t overdo it. You need to provide a urine sample. Drinking a normal amount of water is fine. Excessive water intake can dilute your sample, which gets flagged and requires a retest.
- Avoid alcohol for at least 48 hours. Alcohol elevates blood pressure and dehydrates you, both of which can cause problems at the medical exam.
- Skip energy drinks and heavy caffeine. These spike blood pressure and heart rate. An elevated reading at MEPS can delay your processing.
- Eat a normal breakfast. MEPS provides meals, but eating something light before your blood draw helps prevent dizziness.
- Wear comfortable, simple clothing. You’ll be changing in and out of a medical gown. Leave jewelry, hats, and anything with offensive graphics at home.
Bring your Social Security card, a valid government-issued photo ID, and any medical records or prescriptions your recruiter told you to have on hand. If you wear glasses or contacts, bring them along with your prescription information. Your recruiter should give you a specific list based on your situation, but those basics apply to everyone.
What Happens If You Don’t Pass
Failing one part of MEPS doesn’t always mean you’re done. A failed drug test is the hardest to recover from, with permanent records and long disqualification periods. But medical issues often qualify for waivers, and ASVAB scores can be retaken after a waiting period (typically one month for the first retest, then six months for subsequent attempts).
If the doctor flags a medical concern, you may be sent home with instructions to get additional testing or documentation from a civilian specialist. Once you provide that, MEPS reviews it and makes a decision. This back-and-forth can add weeks or months to your enlistment timeline, which is why getting your medical records sorted out before your appointment saves enormous headaches.