1. What Is the ASVAB?
The Armed Services Vocational Aptitude Battery (ASVAB) is a standardised test administered by the US Military Entrance Processing Command (MEPCOM). It serves two primary purposes: determining whether you qualify for military enlistment through the Armed Forces Qualifying Test (AFQT) score, and identifying which military occupational specialties (MOS, ratings, or Air Force Specialty Codes) you are best suited for.
More than one million people take the ASVAB each year, including high school and post-secondary students exploring their options through the Student Testing Program, as well as active applicants at Military Entrance Processing Stations (MEPS). The test is free to take and scores are valid for two years.
2. Test Format and Subtests
The ASVAB consists of 10 subtests covering a wide range of academic and technical knowledge areas. At MEPS, the test is taken in the Computer Adaptive Test (CAT-ASVAB) format, which adapts question difficulty based on your performance. The paper-and-pencil version (MET-site ASVAB) is also available at some locations.
| Subtest | Abbr. | Questions | Time | AFQT? |
|---|---|---|---|---|
| General Science | GS | 25 | 11 min | No |
| Arithmetic Reasoning | AR | 30 | 36 min | Yes |
| Word Knowledge | WK | 35 | 11 min | Yes |
| Paragraph Comprehension | PC | 15 | 13 min | Yes |
| Mathematics Knowledge | MK | 25 | 24 min | Yes |
| Electronics Information | EI | 20 | 9 min | No |
| Auto & Shop Information | AS | 25 | 11 min | No |
| Mechanical Comprehension | MC | 25 | 19 min | No |
| Assembling Objects | AO | 25 | 15 min | No |
| Verbal Expression* | VE | — | — | Yes |
*Verbal Expression (VE) is a derived score combining Word Knowledge and Paragraph Comprehension. It is not a standalone subtest.
3. Understanding AFQT Scores
Your AFQT score is a percentile score ranging from 1 to 99. It represents how you performed compared to a nationally representative sample of 18–23-year-olds. An AFQT score of 50 means you scored as well as or better than 50% of that reference group.
The AFQT is calculated from four subtests: Arithmetic Reasoning (AR), Mathematics Knowledge (MK), and Verbal Expression (VE), which is itself derived from Word Knowledge (WK) and Paragraph Comprehension (PC). The formula is:
AFQT = AR + MK + (2 × VE)
Raw score converted to a percentile (1–99)
AFQT scores are grouped into categories. Categories I–IIIA (scores 50–99) are considered above average. Categories IIIB–IVA (31–49) are acceptable for most branches. Category IVB and below (1–30) generally make enlistment difficult or impossible without significant waivers.
4. Branch Minimum Score Requirements
Each branch of the military sets its own minimum AFQT score. These are the standard minimums for high school diploma holders (GED holders typically need higher scores):
These are minimums — to be competitive and access desirable jobs, aim for 50+. The Air Force and Coast Guard are the most selective and have higher standards in practice despite the listed minimums.
5. MOS Composite Scores
Beyond the AFQT, each branch uses composite scores (also called line scores or aptitude area scores) derived from specific subtest combinations to determine job qualification. For the Army, these include:
- Skilled Technical (ST): GS + MK + EI + WK — for technical and intel jobs
- Electronics (EL): AR + EI + GS + MK — for signal and electronics roles
- General Maintenance (GM): GS + AS + MK + EI — for maintenance specialties
- Clerical (CL): AR + MK + WK — for administrative roles
- Combat (CO): AR + CS + AS + MC — for infantry and combat arms
- Field Artillery (FA): AR + CS + MK — for artillery specialties
Other branches use similar composite systems with different names. Maximising your score across all 10 subtests gives you the widest selection of occupational specialties.
6. How to Prepare
Most people can significantly improve their ASVAB score with focused preparation. Here is a structured approach:
7. Test Day Tips
- Bring two forms of ID — a photo ID and a Social Security card or birth certificate.
- Arrive early. MEPS processes are long — budget the full day for the CAT-ASVAB at MEPS.
- No calculator is allowed. Practice mental math and estimation strategies.
- On the CAT-ASVAB you cannot go back to previous questions — commit to each answer.
- Eliminate obviously wrong answers and use process of elimination on hard questions.
- If you score below your goal, you can retest after 30 days (once), then 6 months between retests.
- Get adequate sleep the night before. Cognitive performance drops significantly with fatigue.