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<p>Expanding it:</p>
<p>1 year (of a particular course, e.g. general chemistry) = 2 semesters = 3 quarters ≅ 1/15 or 1/16 of the credits needed to graduate.</p>
<p>So if 120 credits are needed to graduate at your bachelor’s degree school (common for semester system schools – this is the “semester hour” credit counting system), then 1 year of general chemistry would mean approximately 8 credits of general chemistry.</p>
<p>At a quarter system school where 180 credits are needed to graduate, then 1 year of general chemistry would mean approximately 12 credits of general chemistry. If the student transferred to the semester system school in the previous example, the 12 quarter system credits would be equivalent to 8 semester system credits. If the student transferred after taking only two quarters for 8 quarter system credits, s/he would have 5.3 semester system credits (and, in practice, would have to take a course that partially repeats his/her second quarter course to complete the sequence, since the “boundaries” between courses do not line up the same way).</p>