http://www.aaa3.net/how-to-scale-test-scores/

Can someone convert these SAT subject test scores to ACT scores?
i got a 680 in biology (E) and a 660 in literature
both are out of 800
how do those stack up on the ACT scale?
No, that’s impossible. The ACT does not have a specific biology section; It has a science section but that section contains chem, lab knowledge, and physical science too.
The ACT has a reading section, but that section is VERY different from the SAT Literature exam.
While I can’t convert, a 680 and a 660 in Literature are both very nice scores. A little lower than Ivy League caliber scores, but they’re very fine
Should Teacher Performance be Linked to Student Test Scores?