Overview
The ASVAB (Armed Services Vocational Aptitude Battery) is the standardized test used by all branches of the United States military to assess a recruit's potential. First introduced in 1968, the test has evolved from a paper-based exam into the CAT-ASVAB — a computerized adaptive test that adjusts difficulty based on your responses in real time.
Every person who enlists in the Army, Navy, Air Force, Marines, Coast Guard, or Space Force takes the ASVAB. Your scores determine two things: whether you qualify to enlist at all (via the AFQT composite) and which specific career fields you're eligible for (via line scores).
The Nine Sections
The ASVAB consists of nine separately timed sections, each testing a different domain:
- Arithmetic Reasoning (AR) — Multi-step math word problems
- Word Knowledge (WK) — Vocabulary and synonyms
- Paragraph Comprehension (PC) — Reading comprehension
- Mathematics Knowledge (MK) — Algebra and geometry
- General Science (GS) — Biology, chemistry, physics, earth science
- Electronics Information (EI) — Electrical circuits and principles
- Mechanical Comprehension (MC) — Forces, machines, physics
- Auto & Shop Information (AS) — Vehicle systems and tools
- Assembling Objects (AO) — Spatial reasoning
AFQT vs Line Scores
The first four sections (AR, WK, PC, MK) make up the Armed Forces Qualification Test (AFQT) — a percentile score from 1 to 99 that determines whether you qualify to enlist. Each branch sets its own minimum (Army: 31, Navy: 31, Marines: 32, Air Force: 36, Coast Guard: 36, Space Force: 36).
Your remaining sections combine with the AFQT four into composite line scores — like General Technical (GT), Electronics (EL), and Mechanical Maintenance (MM). These composites determine which specific career fields (MOS, AFSC, ratings) you qualify for within your branch.
The AFQT gets you in the door. Your line scores decide which room you walk into.
How to Prepare
The ASVAB tests high school-level knowledge across verbal, math, and technical domains. The most effective preparation strategy is to identify your weakest AFQT section and drill it — since the AFQT determines enlistment eligibility, improving your lowest section has the highest return on time invested.
Practice tests with real scoring (like the ones on this site) give you the most accurate picture of where you stand and where to focus your study time.