Average IQ by Country: Participant Scores & Sample Sizes
Compare scores from people who chose to take the UniversalIQTest.com online test. The table describes our participants, not the IQ of national populations. Switch between all available results and the last 12 months, and check sample sizes before comparing countries.
Quick answer (top and bottom countries)
Top 5 and bottom 5 countries by mean IQ in the current view, with a minimum sample size of 200.
| Rank | Country | IQ-style score | N | Approx. interval |
|---|---|---|---|---|
| Top 5 averages | ||||
| #1 |  China | 106.5 | 7,188 | 106.2 to 106.8 |
| #2 |  Japan | 105.2 | 5,613 | 104.8 to 105.6 |
| #3 |  Hong Kong | 104.4 | 960 | 103.4 to 105.4 |
| #4 |  South Korea | 103.1 | 7,920 | 102.8 to 103.4 |
| #5 |  Australia | 102.7 | 308 | 101 to 104.4 |
| Bottom 5 averages | ||||
| #1 |  Saudi Arabia | 95.1 | 384 | 93.7 to 96.5 |
| #2 |  Iraq | 95.3 | 293 | 93.4 to 97.2 |
| #3 |  Egypt | 95.4 | 675 | 94.3 to 96.5 |
| #4 |  Ukraine | 96.5 | 22,305 | 96.3 to 96.7 |
| #5 |  Morocco | 97.0 | 285 | 95.2 to 98.8 |
- China currently sits near the top with N=7,188 in the Validated view.
- Across countries, the mean range spans about 11.4 IQ points in this view.
- Care matters: leaders like China invest about 50% more time than average. Time alone is not a guarantee of success (see Saudi Arabia).
The displayed group score converts the group’s average percentile rank in the selected dataset view to an IQ-style scale (100, standard deviation 15). It is not the arithmetic mean of individual IQ scores.
Intervals use an approximate spread estimated from the interquartile range and sample size. They are indicative uncertainty ranges around the transformed group score, not validated confidence intervals for a population mean.
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IQ map by country
Click a country to jump to its row. Use search to focus on a specific country.
Country rankings (mean IQ, CI, N)
Full sortable rankings with mean, CI, sample sizes, and validation rate.
| Trend(Last 12 Months) | Approx. interval | ||||||||
|---|---|---|---|---|---|---|---|---|---|
#1 | China | 106.5 +0.3 ^ | +0.3 ^ | 7,188 | 106.2 to 106.8 | 7,188 | 35.3% | 53:54 | 2026-10-13 |
#2 | Japan | 105.2 +2.2 ^ | +2.2 ^ | 5,613 | 104.8 to 105.6 | 5,613 | 40.8% | 44:56 | 2026-10-12 |
#3 | Hong Kong | 104.4 +1.0 ^ | +1.0 ^ | 960 | 103.4 to 105.4 | 960 | 37.6% | 52:35 | 2026-10-13 |
#4 | South Korea | 103.1 -0.4 v | -0.4 v | 7,920 | 102.8 to 103.4 | 7,920 | 30.3% | 38:16 | 2026-10-11 |
#5 | Australia | 102.7 +0.5 ^ | +0.5 ^ | 308 | 101 to 104.4 | 308 | 36.4% | 45:04 | 2026-08-12 |
#6  | Taiwan | 102.3 -1.1 v | -1.1 v | 2,046 | 101.7 to 102.9 | 2,046 | 36.9% | 43:24 | 2026-08-16 |
#7  | Italy | 101.7 +0.6 ^ | +0.6 ^ | 1,483 | 100.9 to 102.5 | 1,483 | 33.9% | 44:15 | 2026-10-13 |
#8  | United States of America | 101.7 +0.3 ^ | +0.3 ^ | 2,945 | 101.2 to 102.2 | 2,945 | 38.8% | 46:56 | 2026-10-14 |
#9  | Sweden | 101.4 +0.3 ^ | +0.3 ^ | 849 | 100.4 to 102.4 | 849 | 36.5% | 50:10 | 2026-10-13 |
#10  | Switzerland | 101.3 +0.4 ^ | +0.4 ^ | 624 | 100.2 to 102.4 | 624 | 35.7% | 40:49 | 2026-10-13 |
#11  | Latvia | 101.3 +0.7 ^ | +0.7 ^ | 226 | 99.6 to 103 | 226 | 42.8% | 47:08 | 2026-10-12 |
#12  | Netherlands | 101.2 +0.2 ^ | +0.2 ^ | 1,603 | 100.5 to 101.9 | 1,603 | 39.0% | 41:57 | 2026-10-13 |
#13  | Belgium | 101.1 +0.3 ^ | +0.3 ^ | 572 | 99.9 to 102.3 | 572 | 47.8% | 49:00 | 2026-10-12 |
#14  | Austria | 100.9 +0.1 ^ | +0.1 ^ | 774 | 99.8 to 102 | 774 | 42.2% | 40:13 | 2026-10-13 |
#15  | Belarus | 100.9 +0.6 ^ | +0.6 ^ | 782 | 99.9 to 101.9 | 782 | 36.9% | 41:48 | 2026-10-13 |
#16  | Spain | 100.9 +1.3 ^ | +1.3 ^ | 700 | 99.8 to 102 | 700 | 39.7% | 41:17 | 2026-10-13 |
#17  | Germany | 100.8 +0.4 ^ | +0.4 ^ | 6,413 | 100.4 to 101.2 | 6,413 | 45.4% | 45:59 | 2026-10-13 |
#18  | Canada | 100.7 +0.2 ^ | +0.2 ^ | 819 | 99.6 to 101.8 | 819 | 40.4% | 51:48 | 2026-10-14 |
#19  | Finland | 100.7 +0.7 ^ | +0.7 ^ | 848 | 99.7 to 101.7 | 848 | 35.2% | 52:50 | 2026-10-13 |
#20  | United Kingdom | 100.7 +1.2 ^ | +1.2 ^ | 1,058 | 99.8 to 101.6 | 1,058 | 37.7% | 43:59 | 2026-10-13 |
#21  | Azerbaijan | 100.4 +1.7 ^ | +1.7 ^ | 205 | 98.4 to 102.4 | 205 | 25.7% | 48:19 | 2026-10-13 |
#22  | India | 100.4 0.0 = | 0.0 = | 428 | 99.1 to 101.7 | 428 | 25.1% | 47:59 | 2026-10-13 |
#23  | Portugal | 100.2 -0.1 v | -0.1 v | 325 | 98.7 to 101.7 | 325 | 4.8% | 48:37 | 2026-10-12 |
#24  | France | 99.8 -0.2 v | -0.2 v | 3,061 | 99.3 to 100.3 | 3,061 | 39.2% | 39:44 | 2026-10-13 |
#25  | Greece | 99.8 +0.1 ^ | +0.1 ^ | 680 | 98.7 to 100.9 | 680 | 32.3% | 41:00 | 2026-10-12 |
#26  | Malaysia | 99.7 +0.9 ^ | +0.9 ^ | 240 | 97.9 to 101.5 | 240 | 34.4% | 56:58 | 2026-10-12 |
#27  | Denmark | 99.6 +0.8 ^ | +0.8 ^ | 582 | 98.2 to 101 | 582 | 38.0% | 40:25 | 2026-10-13 |
#28  | Hungary | 99.6 +0.6 ^ | +0.6 ^ | 890 | 98.6 to 100.6 | 890 | 33.3% | 36:50 | 2026-10-12 |
#29  | Norway | 99.5 +0.8 ^ | +0.8 ^ | 455 | 98.1 to 100.9 | 455 | 37.7% | 40:27 | 2026-10-13 |
#30  | Russia | 99.5 +1.7 ^ | +1.7 ^ | 13,533 | 99.3 to 99.7 | 13,533 | 31.7% | 40:15 | 2026-10-13 |
#31  | Czech Republic | 99.3 +1.1 ^ | +1.1 ^ | 1,385 | 98.6 to 100 | 1,385 | 39.6% | 38:40 | 2026-10-13 |
#32  | Indonesia | 99.2 +0.1 ^ | +0.1 ^ | 344 | 97.4 to 101 | 344 | 23.4% | 34:01 | 2026-08-24 |
#33  | Estonia | 98.8 +1.9 ^ | +1.9 ^ | 348 | 97.5 to 100.1 | 348 | 40.0% | 40:18 | 2026-10-13 |
#34  | Kazakhstan | 98.5 +0.7 ^ | +0.7 ^ | 1,094 | 97.7 to 99.3 | 1,094 | 29.5% | 43:34 | 2026-10-12 |
#35  | Poland | 98.5 +0.9 ^ | +0.9 ^ | 2,692 | 98 to 99 | 2,692 | 35.7% | 37:17 | 2026-10-13 |
#36  | Slovakia | 98.3 +0.8 ^ | +0.8 ^ | 1,499 | 97.6 to 99 | 1,499 | 35.8% | 37:47 | 2026-10-13 |
#37  | Uzbekistan | 98.3 +0.7 ^ | +0.7 ^ | 477 | 97 to 99.6 | 477 | 19.1% | 40:04 | 2026-09-30 |
#38  | Romania | 98.2 +0.6 ^ | +0.6 ^ | 1,038 | 97.3 to 99.1 | 1,038 | 30.8% | 44:31 | 2026-10-14 |
#39  | Bulgaria | 98 +0.6 ^ | +0.6 ^ | 722 | 97 to 99 | 722 | 36.0% | 38:44 | 2026-10-09 |
#40  | Turkey | 97.9 -0.7 v | -0.7 v | 3,832 | 97.5 to 98.3 | 3,832 | 25.4% | 38:17 | 2026-10-13 |
#41  | United Arab Emirates | 97.8 +0.9 ^ | +0.9 ^ | 200 | 95.8 to 99.8 | 200 | 20.2% | 42:54 | 2026-10-06 |
#42  | Algeria | 97.8 -0.3 v | -0.3 v | 396 | 96.5 to 99.1 | 396 | 24.2% | 39:58 | 2026-10-09 |
#43  | Thailand | 97.6 +1.3 ^ | +1.3 ^ | 1,508 | 96.9 to 98.3 | 1,508 | 18.1% | 34:55 | 2026-10-11 |
#44  | Mexico | 97.3 0.0 = | 0.0 = | 286 | 95.6 to 99 | 286 | 36.5% | 49:23 | 2026-10-10 |
#45  | Brazil | 97.1 -0.2 v | -0.2 v | 1,386 | 96.2 to 98 | 1,386 | 32.0% | 53:28 | 2026-10-13 |
#46 | Morocco | 97 +0.6 ^ | +0.6 ^ | 285 | 95.2 to 98.8 | 285 | 26.1% | 42:24 | 2026-10-13 |
#47 | Ukraine | 96.5 0.0 = | 0.0 = | 22,305 | 96.3 to 96.7 | 22,305 | 33.3% | 35:42 | 2026-10-13 |
#48 | Egypt | 95.4 +1.9 ^ | +1.9 ^ | 675 | 94.3 to 96.5 | 675 | 24.9% | 37:41 | 2026-10-13 |
#49 | Iraq | 95.3 +0.6 ^ | +0.6 ^ | 293 | 93.4 to 97.2 | 293 | 23.4% | 38:12 | 2026-09-28 |
#50 | Saudi Arabia | 95.1 +1.0 ^ | +1.0 ^ | 384 | 93.7 to 96.5 | 384 | 27.1% | 51:15 | 2026-10-04 |
Compare countries
Compare mean, CI, N, distribution range, time, and validation rate in the current view.
Sample size by country (N)
Bars are stacked (validated + unvalidated). Showing the top 40 by all-results N.
Why sample size matters
The statistical stability of a mean depends directly on sample size (N). Countries like Ukraine (N=66,909) and Russia (N=42,753) usually yield tighter confidence intervals, while smaller samples can swing more between updates. We intentionally show both validated and unvalidated results for full transparency of the data basis.
Validation rate by country
Validated vs all results, plus the validation rate by country.
Quality assurance: validated vs all results
The validation rate shows how many tests passed our quality checks (for example duplicate attempts, bot-like activity, or incomplete sessions).
- High data quality: In the current view, Germany (45.4%) and Austria (42.2%) are among the strongest validation rates.
- Transparency: The gap between the bars shows how much raw traffic we filter out. In total we exclude 226,365 records (67.3%) to protect the statistical core of the IQ mean.
These are averages from self-selected participants in the UniversalIQTest.com online test (not population IQ).
IQ distribution by country (p10-p90)
Shows the middle 80% (p10 to p90) and the middle half (p25 to p75). Select up to 5.
Select up to 5 (0/5)
Average time taken by country
Average time taken for the top countries by N in the current view.
Language and device comfort can shift results on timed tasks. Test familiarity and pacing vary across regions and cultures.
How to interpret country differences
- Selection effects: who chooses to take an online test differs by country.
- Language and device comfort can shift results on timed tasks.
- Test familiarity and pacing vary across regions and cultures.
- Repeat attempts, VPN usage, and access patterns can affect averages.
- Differences are usually small and groups overlap a lot - do not over-interpret rank order.
Method and data notes
- Country is self-reported and not independently verified.
- Results are from an online, self-selected dataset - not population norms.
- This does not mean a country causes higher IQ.
- The displayed group score converts the group’s average percentile rank in the selected dataset view to an IQ-style scale (100, standard deviation 15). It is not the arithmetic mean of individual IQ scores.
- If you only look at rank order, you will overread tiny differences - check CI and N.
Download, cite, and embed
UniversalIQTest.com. Average IQ by Country (accessed 2026-10-15). https://www.universaliqtest.com/statistics/average-iq-by-country
<iframe src="https://www.universaliqtest.com/statistics/average-iq-by-country" width="100%" height="720" loading="lazy" title="Average IQ by Country: Participant Scores & Sample Sizes"></iframe> <p><a href="https://www.universaliqtest.com/statistics/average-iq-by-country">Average IQ by Country: Participant Scores & Sample Sizes — UniversalIQTest.com</a></p>
FAQ
Use the table or compare tool to see the current mean, CI, and sample size.
This dataset is self-selected and online. Differences can reflect selection, language, device, and pacing rather than population differences.
No. These are online test results summarized as dataset statistics, not population norms.
No. This page shows associations in our dataset and should not be read as causal.
Validated results pass quality checks; all results include unvalidated submissions.