Scores
The SAT is scored on a scale of 400-1600
The ACT is scored on a scale of 1-36
Questions
SAT questions require more time to understand and answer
ACT questions tend to be more straightforward
Reading
The SAT has FIVE reading passages
The ACT has FOUR reading passages
Science
If you're a true science-phobe the SAT might be a better fit
The ACT has a Science section that tests your critical thinking skills
Math
Both tests have the same advanced math concepts: Arithmetic, Algebra I & II, Geometry and Trigonometry
Calculator
You do NOT get a calculator on all the math questions on the SAT
You get a calculator for ALL math questions on the ACT
Essay
50 minutes, The SAT essay section is more comprehension focused
40 minutes, The ACT wants to see how well you can evaluate and analyze complex issues
Score Submission
You can submit the best score from each part of the SATs from all the times you have attempted the exam
You can only submit your best composite score from each individual ACT exam