The ASVAB test, explained
The ASVAB is the aptitude test every U.S. military applicant takes. Four of its subtests form your AFQT, the percentile score that decides whether you can enlist. The rest decide which jobs you qualify for.
Free ASVAB practice test
- 50 questions
- 40 minutes
- Instant score
By the LifeScore Editorial Team · Updated · How we check facts
- 9
- subtests
- 4
- count to the AFQT
- 1 to 99
- AFQT percentile
- 2 years
- scores stay valid
What the ASVAB is
The Armed Services Vocational Aptitude Battery is a multiple-choice test written by the Department of Defense. It does two jobs: it qualifies you to enlist, and it steers you towards jobs that fit your strengths. High schools also offer it as a career exploration test.
Most applicants take the computer-adaptive version (CAT-ASVAB) at a military entrance processing station. It adjusts to you: a correct answer brings a harder question, a wrong one an easier one, and you cannot skip or go back. A paper version is used at some test sites.
The nine subtests
The AFQT uses the first four rows. The other five feed the line scores that decide which jobs are open to you.
| Subtest | What it covers | In the AFQT? |
|---|---|---|
| Arithmetic Reasoning (AR) | Word problems: percent, ratio, rate, work, averages | Yes |
| Mathematics Knowledge (MK) | Algebra, geometry, exponents, fractions | Yes |
| Word Knowledge (WK) | Word meanings, often in a short sentence | Yes (double) |
| Paragraph Comprehension (PC) | Short passages: main idea, detail, inference | Yes (double) |
| General Science (GS) | Life, earth and physical science | No |
| Electronics Information (EI) | Circuits, current, components | No |
| Auto and Shop Information (AS) | Cars, tools, shop practice | No |
| Mechanical Comprehension (MC) | Levers, pulleys, forces | No |
| Assembling Objects (AO) | Spatial puzzles | No |
How your AFQT is calculated
The AFQT combines four subjects: AFQT = 2 × Verbal Expression + Arithmetic Reasoning + Mathematics Knowledge, where Verbal Expression is Word Knowledge plus Paragraph Comprehension. That puts half of the AFQT weight on verbal skills.
The result is converted to a percentile from 1 to 99 against a national reference group. An AFQT of 50 beats half of that group. The Department of Defense groups AFQT scores into categories: I (93 to 99), II (65 to 92), IIIA (50 to 64), IIIB (31 to 49), IVA (21 to 30), IVB (16 to 20), IVC (10 to 15) and V (1 to 9). Try your own numbers in the AFQT score calculator.
What score do you need?
Every service sets its own minimum AFQT, and it is higher for applicants with a GED or other equivalency than for diploma holders. Commonly reported minimums are 31 (Army), 32 (Marine Corps), 35 (Navy), 36 (Air Force) and 40 (Coast Guard). Sources differ, so confirm yours with a recruiter. Qualifying is only the first step: many jobs need much higher line scores, so a higher AFQT keeps more doors open. The full table is on what is a good ASVAB score.
Retesting and score validity
ASVAB scores generally stay valid for enlistment for two years. If you are not happy with a score, retest rules apply: you normally wait one calendar month before the first retest and another month before a second, then longer for later attempts. Rules differ by service and situation, so ask your recruiter before you book.
How to prepare
Because the AFQT is only four subjects, a focused plan works. Spend your time on word meanings, reading for the point, word-problem setup and the algebra and geometry rules you last used in school. Start with a free ASVAB practice test to find your weakest subject, try the ASVAB practice questions, then follow the plan in how to pass the ASVAB.
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Start the free ASVAB testFrequently asked questions
What does ASVAB stand for?
What is the AFQT?
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Can I use a calculator on the ASVAB?
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LifeScore is not affiliated with the U.S. Department of Defense or any military branch. ASVAB is a registered trademark of the Department of Defense. Our practice tests cover the four AFQT subjects with original questions and are not the official test. Reviewed October 2026 by the LifeScore Editorial Team.