If a student decides to only send his ACT scores to Colleges, do they convert that Act score into SAT scores or do they just take your ACT score!
They just take your ACT score. 
They do use “SAT-ACT Concordance Tables”, so can compare scores, but you’re not at a disadvantage by taking the ACT.
Good Luck!
So they do compare scores with the Concordance Tables,? I’ll have to look it up and also see what my ACT score of 32 compares to!