<p>Collegeboard explains their policy.
<a href="http://www.collegeboard.com/student/testing/sat/testday/calc.html%5B/url%5D">http://www.collegeboard.com/student/testing/sat/testday/calc.html</a></p>
<p>"The only Subject Tests for which calculators are allowed are Math Level 1 and Level 2. A scientific or graphing calculator is required for these tests. A graphing calculator may provide an advantage over a scientific calculator on some questions. The tests are developed with the expectation that most students are using graphing calculators. Calculators are not allowed for any other Subject Tests, including Biology E/M, Chemistry, and Physics."</p>