The AP Chemistry exam is 3 hours and 15 minutes long in total, including both sections.

Quick Scoop: AP Chem Timing

Here’s how that time breaks down:

  • Total exam length: 3 hours 15 minutes.
  • Section I – Multiple Choice:
    • 60 questions
    • 90 minutes (1 hour 30 minutes)
    • Counts for 50% of your score.
  • Section II – Free Response:
    • 7 questions total (3 long, 4 short)
    • 105 minutes (1 hour 45 minutes)
    • Counts for 50% of your score.

In other words, when you’re planning practice, simulate a full 3 hour 15 minute block with 90 minutes for MCQs and 105 minutes for FRQs so your pacing feels natural on test day.

TL;DR:
The AP Chem exam is 3h15m total: 90 minutes for 60 multiple‑choice questions and 105 minutes for 7 free‑response questions.

Information gathered from public forums or data available on the internet and portrayed here.