Take a standardized IQ test administered by a licensed psychologist
Use a reputable, normed online IQ test only as a rough estimate
Compare your score to the test’s age-based norm group
Check whether the test reports a full-scale IQ or only a subscore
Make sure the test is timed and uses standardized instructions
Avoid using unverified quizzes or puzzle apps as IQ measures
Retest only after enough time has passed to reduce practice effects
Consider a professional evaluation if you want the most accurate result