The ACT test itself is just under 3 hours, but your total time at the test center is longer.
Core test length
The standard ACT without the optional writing section is 2 hours and 55 minutes of testing time.
Including check‑in, instructions, and the built‑in 10‑minute break, students typically spend around 3.5 hours at the test center for the no‑writing ACT.
With the writing section
If you add the optional writing (essay) section, that adds 40 minutes of testing time.
With writing plus breaks and instructions, expect to be at the test center for close to 4 hours total.
Section timing
The required sections and their timings are: English 45 minutes, Math 60 minutes, Reading 35 minutes, and Science 35 minutes.
Together these four sections make 2 hours and 55 minutes, before adding the optional 40‑minute writing section.
