IQ Score Percentile Table (2026): 70–145 Explained
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Snippet-ready IQ-to-percentile reference for standard SD-15 tests, with notes on SD-16 and testing limits.
Who This Article Is For
Users who want a fast lookup table for featured snippets and calculators.
Key Takeaways
Table assumes mean 100, SD 15 (WISC/WAIS style).
130 ≈ 98th percentile; 145 ≈ 99.9th—extremely rare in practice.
Stanford-Binet SD 16 shifts cutoffs slightly.
Always read the norm table from your specific test.
IQ to Percentile Table (SD-15)
Use this table for quick orientation on common U.S. norms. Your test report is authoritative if numbers differ slightly.
- IQ 70 → ~2nd percentile
- IQ 85 → ~16th percentile
- IQ 100 → ~50th percentile (average)
- IQ 115 → ~84th percentile
- IQ 120 → ~91st percentile
- IQ 125 → ~95th percentile
- IQ 130 → ~98th percentile
- IQ 135 → ~99th percentile
- IQ 140 → ~99.6th percentile
- IQ 145 → ~99.9th percentile
How This Links to Mensa and Gifted
Mensa targets top 2% on approved tests—often near 130 on SD-15. Gifted cutoffs vary by district (sometimes 125–130).
Sources & further reading
External links open authoritative references used to fact-check this article. GuideIQ summarizes research; always read primary sources for clinical or legal decisions.
- APA — Intelligence
Professional framing of IQ scales.
- Britannica — Intelligence
Historical and technical context on testing.
Common Interpretation Mistakes
Using this table for childhood tests with different SDs without conversion.
Treating percentile as school grade.
90-Day Action Plan
Find your score row, then read what is a good IQ score.
Use IQ percentile calculator for in-between numbers.
Frequently Asked Questions
What percentile is IQ 120?
About the 91st on SD-15 norms.
What percentile is IQ 130?
About the 98th—often Mensa-eligible on accepted tests.
Is this table exact?
Approximation. Use your test publisher's table for decisions.
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