The SAT
does not include a science section
more time per question
half of SAT math is reading comprehension
Math is worth 50% of the total score
Reading section has higher level passages (11th grade level) and questions, but more time to solve the questions
The ACT
40 minutes for ACT essay (giving your own opinion about an issue)
Math is worth 25% of the total score
higher level and more difficult math on the ACT
significantly less time per question
more straightforward, but that doesn't make it easier to score well
allows calculator use on all math questions
includes a science section that tests your ability to read data (doesn't actually test much science)
Reading section has lower level passages (9th grade level) and questions, but much less time to solve the questions