Take a standardized IQ test administered by a licensed psychologist
Use a reputable online IQ test only as a rough estimate
Ask a school counselor, psychologist, or doctor for a referral
Check whether your workplace or school offers cognitive testing
Compare results from multiple valid tests over time
Make sure the test is age-normed and standardized
Avoid tests that promise instant “true IQ” results
Review the score report for subtest and overall scores
Retest only after enough time has passed to reduce practice effects