Direct SAT percentile-to-IQ conversion is invalid. SAT/ACT correlate 0.8-0.85 with IQ. SAT tests only verbal/math abilities unlike full IQ tests. SAT percentiles outdated from score inflation and content changes. Convert via z-scores from current percentiles regressed by 0.84 coefficient. Perfect SAT yields 3.29 IQ SD versus Emil's 2.95. Minor method differences from Emil irrelevant. Tied SAT scores get manually spaced percentiles. ACT scores interpolated due to wider spacing. Practice boosts SAT by 200 points yet remains solid IQ measure. GRE conversion needed especially verbal/math breakdowns. Graduate entrants 1-2 SD above average IQ.