IQGrab is a single-sitting IQ test: 20 questions, about 12 minutes. The moment you submit, you get everything — your score, percentile, margin of error, five-skill breakdown, and an explanation for every single question. All free, all right there. Not a cash grab — just your IQ.
Not just a lonely number. A complete report, generated instantly — no waiting, no paying to unlock it.
Questions are weighted by difficulty and converted to the familiar IQ scale (average 100, standard deviation 15). We also show a ±7-point margin of error — every test has one, so we print ours.
Roughly what share of people you scored above. “Higher than about 96% of people” is a lot easier to grasp than an abstract “126.”
Pattern reasoning, number sequences, logic, spatial reasoning, and verbal analogies — each scored separately and shown in a radar chart and bars, so you can see where you're strong and where you're not.
All 20 questions, one by one: your answer, the correct answer, and how to solve it. You'll see exactly where you went wrong — the part many paid reports leave out.
This one doesn't count. It just gives you a feel for the format. In the real test, questions go from easier to harder.
Look at the gaps between numbers: 4, 6, 8, 10… What should the next gap be?
4 questions per area, 20 total. Types are mixed together, difficulty builds as you go, and later questions carry more weight.
Spot the rule in a visual sequence: shape, rotation, and count.
4 questionsFind what comes next: differences, multiples, alternating patterns, and classic sequences.
4 questionsDeduction, syllogisms, ordering, and who's-telling-the-truth puzzles.
4 questionsCounting shapes, mental rotation, and top-down views — turning objects in your head.
4 questionsHow words relate: function, place, category, and measurement.
4 questionsA lot of IQ sites hide their math because it wouldn't hold up to scrutiny. Here's our full method for this version, in the open.
Each question is weighted by difficulty (easy = 1, medium = 2, hard = 3). We first compute your weighted accuracy p, then convert it to an IQ score:
IQ = 100 + 15 × (p − 55%) ÷ 18%, clamped to a range of 70–145. In plain terms: getting about half the weighted credit puts you near 100 (right at the population average), and a perfect paper scores about 138 — there is no “casually score a 145” here.
Percentiles assume IQ scores follow a normal distribution with a mean of 100 and a standard deviation of 15 — the standard convention in the U.S. For example, 115 is about the 84th percentile, and 130 is about the 98th.
A 20-question test naturally bounces around: your focus, a lucky guess, or one odd question can move the result. ±7 points is a typical measurement error for a short test like this — your “true” level most likely falls inside that range, rather than being exactly the headline number.
Before you start, we ask for your age group. For now it's only used as context in your report. This version does not yet use separate age-based norms — everyone is scored on the same conversion — so treat the result as a rough sense of where you stand, not an age-adjusted clinical score.
This version is entirely free: score, percentile, five-skill breakdown, and every explanation. If we ever add a paid feature, the price will be stated clearly before you start — never as a surprise paywall after you finish.
No. The whole test runs in your browser. Your answers are not uploaded, and there is no account system. Close the page and the result is gone — if you want to keep it, copy the summary on the results page.
Yes — there's a “Retake” button on the results page. Just know that a retake after you've seen the answers will be inflated. Your first, honest attempt is the most meaningful one: grab your score once, carefully, instead of fishing for a higher number.
No. Once the timer starts it keeps running, and the test auto-submits at 15 minutes. You can move back and forth and change answers — a good strategy is to do the ones you know first and save the tough ones for last.
IQGrab is available in 12 languages with the same 20 questions, scoring and explanations. Pick your language — the whole test, report and review switch instantly, no reload needed. Free IQ test · Test de IQ gratis · 免费智商测试 · Kostenloser IQ-Test · Test de QI gratuit · Teste de QI grátis · 無料IQテスト · 무료 IQ 테스트 · Бесплатный тест IQ · اختبار ذكاء مجاني · मुफ़्त IQ टेस्ट.
Select your age group
Used only as context in your report. It isn't stored or uploaded. When you're ready, hit “Start” — the timer begins immediately.
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Every question with the correct answer and how to solve it. Understanding a miss teaches you more than retaking the test.
Your result lives only on this page and disappears when you close it. We don't upload or store your answers.