The most accurate free IQ test online — built on advanced psychometric methods used by clinical psychologists. Measures 5 cognitive domains. Age-calibrated norms for ages 6–80+. Instant results in 25 minutes.
Clinical-Grade Psychometric Structure
Built on the same 5-domain framework as the WAIS-5 — the gold-standard IQ test used by licensed psychologists worldwide. The most rigorous free IQ test available online.
What number comes next in the sequence?
Your cognitive profile
Estimated IQ
127
97th percentile
Before you take the assessment, you can read how IQ scores work, how the test is structured, and what an online result can and cannot tell you. These pages are here for learning, not just monetization.
Plain-language articles about IQ ranges, percentiles, working memory, spatial reasoning, Mensa scores, and test preparation.
Browse guidesSee how the assessment uses five cognitive domains, age-aware variants, timed questions, and transparent score limits.
See methodologyLearn the purpose of IQ Test Center, our editorial standards, and how advertising is separated from educational content.
Read about usMost online IQ tests measure a single domain. Ours measures five — the same domains assessed by the WAIS-5 and Stanford-Binet. Each is independently scored, normed for your age, and displayed on a pentagon radar chart.
Vocabulary, analogies & language comprehension
6 questions
Deduction, syllogisms & pattern inference
6 questions
Numerical reasoning & applied mathematics
6 questions
Mental rotation, matrices & geometry
6 questions
Attentional control & information recall
6 questions
A rigorous, clinically-structured cognitive assessment — free, online, and results in under 30 minutes.
Just enter your age and begin immediately. The system selects the correct assessment variant and applies age-specific psychometric norms for your developmental stage.
Supports ages 6–80+. Six dedicated age bands — each with its own calibrated question set and scoring norms.
30 questions spanning 5 cognitive domains in 25 minutes. Questions interleave across domains — the same structure used in clinical WAIS-5 administration.
Adaptive difficulty. Server-controlled timer. Every answer autosaves in real time.
Instantly unlock your estimated IQ score, exact percentile rank, 5-domain pentagon chart, strengths analysis, and timing metrics.
Free with an account. Or pay $3.99 to get your full PDF report delivered by email — no account required.
Create a free account after the test to unlock your full report instantly. No credit card. No subscription. No catch — ever.
Composite score using advanced psychometric algorithms with age-calibrated percentile ranking.
Visual radar chart across all five cognitive domains — like a clinical profile report.
Narrative AI analysis of your cognitive strengths and areas for development.
Speed and accuracy metrics across all 30 questions — a key indicator of processing efficiency.
Per-domain scores, percentiles, and item-level analysis across all five cognitive areas.
Bank-level row security. Only you can ever access your results. Never shared or sold.
No signup to start · Full results free with an account · One-time payment option available
Most online IQ tests use a single question type with no age calibration — producing inflated, meaningless scores. We use the same rigorous 5-domain structure as the Wechsler Adult Intelligence Scale (WAIS-5), the gold standard used by clinical psychologists worldwide.
30 questions. 25 minutes. Instant results. No signup required to start. Built on advanced psychological testing methods — completely free.
This assessment provides estimated cognitive performance scores for personal insight and educational purposes only. It uses advanced psychometric methods but is not a clinically validated instrument and should not be used for diagnostic, hiring, or placement decisions. For a certified clinical IQ assessment, consult a licensed psychologist.