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IQ Percentile Calculator — Free Online Tool
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IQ Percentile Calculator

Calculate IQ percentile rank and standard Z-score

Psychometric Guidelines: Most modern standardized IQ tests (such as WAIS and Stanford-Binet) use a population mean of 100 and a standard deviation (SD) of 15. Enter your IQ score below.
IQ Score & Parameters Input

Calculation Results

⚠️ Not medical advice. For educational, psychometric, and cognitive reference only. Comprehensive cognitive assessment and IQ interpretation must be conducted by a qualified psychologist.

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