— National cognitive research
Average IQ by country — ranked
— Don't just read about it
Find out YOUR exact IQ
20-min calibrated test · real psychometrics
Start →
Cross-national IQ research synthesised from Lynn & Vanhanen (2012) and subsequent replication studies. All figures are estimates with wide confidence intervals. See individual country pages for full context.
How do YOU compare?
Take a 20-minute calibrated IQ test and find out your personal score.
— Try one before you read on
Which number completes the sequence: 2, 6, 12, 20, 30, ?
Differences grow by 2 each time: +4, +6, +8, +10, +12 → 30+12=42.
That was 1 question. Take the full 20-min test →
Why national IQ averages exist and how to interpret them
→Pause. Find out YOUR IQ before you keep reading.National average IQ scores are population-level statistics, not a fixed attribute of any group of people. The strongest predictors of national average IQ are childhood nutrition, education access, and economic development — all of which are malleable. Countries that invest in these areas consistently see rising IQ scores over time (the Flynn Effect).
Take the Core Brain IQ test →