The SAT

• doesn't allow calculator use on one of the math sections

• 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

• 50 minutes for SAT essay (analysis of an article); since June 2021 the SAT essay has been canceled

• 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