Step 3 is a two-day exam, this is a well-known fact. Day 1 tests Foundations of Independent Practice (FIP), which is about 7 hours long and has 232 multiple-choice questions. Day 2 is Advanced Clinical Medicine (ACM). It’s closer to 9 hours, with 180 multiple-choice questions and then 13 or 14 computer-based case simulations, usually just called CCS.
If you’ve been reading older prep guides, the block numbers you saw there are probably out of date. For a full, current prep plan, see our guide on how to study for Step 3 moved to new testing software in March 2026, and the blocks were reorganized. Good news, though: the number of questions didn’t go up, and neither did the length of each day.
All in, you’re looking at about 16 hours of testing time.
| Step 3 component | Duration | Format |
| Day 1 – FIP | About 7 hours | 232 MCQs |
| Day 2 – ACM | About 9 hours | 180 MCQs + 13–14 CCS cases |
| Total | About 16 hours | 2 testing days |
Don’t picture this as one long 16-hour session. You test on two different days. Each one comes with its own check-in and its own break time.
Day 1 usually runs about 7 hours. The bulk of that is question time. Breaks and an optional tutorial fill in the rest.
Day 1 (FIP) is multiple-choice only. The breakdown:
Plenty of websites still list the old version, which had 6 blocks of 60 minutes. As of March 10, 2026, that’s no longer how it works. You now get twice as many blocks, each half as long. The question count didn’t change.
You’ll see 232 questions on Day 1. Since there are 12 blocks, each one has somewhere between 18 and 20.
Thirty minutes. Once the timer hits zero, that block ends and the next one starts after you choose to continue or take a break.
Expect roughly 9 hours. Day 2 is longer than Day 1 because the CCS cases come after the regular questions.
Day 2 (ACM) has two parts. First come the multiple-choice blocks, then the cases:
Before the update, the MCQ part had 6 blocks of 45 minutes. Today it’s 9 blocks of 30 minutes. The CCS part works the same as before.
Every case has a real-time cap of 10 or 20 minutes, depending on the case. By “real time,” we mean the actual clock in the testing room.
Each case also has its own simulated clock, and that’s the one that confuses people. It shows time passing for the patient, and you’re the one who moves it forward. Say you order labs and want the results. You can advance the clock by a few hours, or even a few days, to see them. In the real world, maybe a minute has gone by.
So, the real-time limit is what ends the case. The simulated clock is just something you use while treating the patient.
See how IMGs master the CCS interface, order sequencing, and clock management before test day with our Step 3 CCS guide.
There are 412 multiple-choice questions in Step 3.
| Day | MCQs | Blocks |
| Day 1 | 232 | 12 |
| Day 2 | 180 | 9 |
| Total | 412 | 21 MCQ blocks |
The CCS cases on Day 2 (13 or 14 of them) aren’t part of that 412. They’re a separate section.
Do the math on a 30-minute block and you get a rough idea:
Call it 90 seconds per question.
But you won’t spend exactly that on every one. Some questions are two lines long and you’ll be done in under a minute. Others come with a full drug ad or a research abstract, and those take longer. Your real goal is finishing the block before time runs out, not hitting 90 seconds every time.
Break time works like a bank. You get a set amount for the day, and you decide when to spend it between blocks.
Day 1 comes with 55 minutes.
Day 2 comes with at least 45 minutes.
You can add to it, too. Finish a block with time left, and those minutes go into your break bank. Skip the tutorial and that time gets added as well. A few extra minutes can really help in the afternoon when focus starts to drop.
Sort of. It depends on what you mean.
Ending a block early: Yes. If you’ve answered everything and still have time on the clock, you can close the block. Whatever time is left gets added to your break time.
Getting extra break time: Also yes. Leftover block time and a skipped tutorial both add to your break bank.
Walking out of the testing center early: That’s a different question. The day has a fixed number of blocks, and on Day 2 you still have to get through the CCS cases. Moving quickly might cut some time off your day, but it’s not something to count on. If you want the exact rules, check the USMLE Bulletin.
One more thing, and it matters: once you leave a block, you can’t go back into it. Check your flagged questions before you end it.
They test different things, and they feel different too.
| Feature | Day 1 | Day 2 |
| Name | FIP | ACM |
| Focus | Foundations and diagnosis | Clinical management |
| MCQs | 232 | 180 |
| MCQ blocks | 12 | 9 |
| Questions per block | 18–20 | 20 |
| Time per block | 30 min | 30 min |
| CCS cases | No | Yes |
| Total session | About 7 hours | About 9 hours |
Day 1 is about the basics you need to work as an independent doctor: the science, the stats, ethics, and getting to the right diagnosis. Day 2 is more hands-on. It wants to know what you’d actually do for the patient, and what you’d do after that.
Below is a quick look at what each day covers.
Most questions follow the usual pattern: a patient case, then pick the best answer. A few formats might be new to you, though.
The ads and abstracts lean heavily on biostatistics. They’re also slower to read, which is worth remembering when you plan your pacing.
On March 10, 2026, Step 3 started using new testing software. What changed most was the way the blocks are split.
| Before March 10, 2026 | From March 10, 2026 | |
| Day 1 blocks | 6 blocks of 60 minutes | 12 blocks of 30 minutes |
| Day 1 questions per block | 38–39 | 18–20 |
| Day 2 MCQ blocks | 6 blocks of 45 minutes | 9 blocks of 30 minutes |
| Day 2 questions per block | 30 | 20 |
| CCS cases | 13–14 | 13–14 |
What stayed the same? The total number of questions, the content outline, and how long each day lasts.
The screen looks different now, too. If you’ve only practiced on older software, give yourself some time to get comfortable with the new one.
Our USMLE program maps UWorld, CCS, and Day 1 content into a structured Step 3 plan that fits residency life.
Some simple things that help on the day:
Roughly 16 hours, split over two days. Day 1 takes about 7 hours and Day 2 about 9.
Plan on about 7 hours. That includes 12 blocks of questions, 55 minutes of break time, and a 5-minute tutorial you can skip.
Close to 9 hours. You’ll finish 9 MCQ blocks first, then 13 to 14 CCS cases. You get at least 45 minutes of break time.
412 multiple-choice questions. Day 1 has 232 and Day 2 has 180. The CCS cases on Day 2 are counted separately.
21 MCQ blocks altogether. Day 1 has 12. Day 2 has 9, and then the CCS cases follow.
Every MCQ block is 30 minutes. On Day 1, a block has 18 to 20 questions. On Day 2, it’s always 20.
55 minutes on Day 1 and at least 45 on Day 2. If you finish blocks early or skip the tutorial, you’ll have more.
Each case gets 10 or 20 minutes of real time. Inside the case, the patient’s clock can move much faster than that.
You can end a block early and keep the leftover time as break time. You can’t go back to that block afterward, though. It’s safest to plan for the whole day.
It opens with 180 multiple-choice questions, split into 9 blocks of 20, with 30 minutes per block. The CCS section comes after that, with 13 to 14 cases.
Day 1 covers foundational science, biostatistics, ethics, and diagnosis. Day 2 focuses on managing patients and includes CCS. It’s also about 2 hours longer.
About 90 seconds on average. That’s 1.5 to 1.67 minutes per question on Day 1 and 1.5 minutes on Day 2.
There’s no single answer. Much of the clinical material is similar to Step 2 CK. Step 3 adds CCS cases, more biostatistics, and more questions about management. Many people find that the two-day length is what wears them down most.
Step 3 spans two days and about 16 hours. Day 1 is roughly 7 hours of multiple-choice, with 232 questions in 12 blocks. Day 2 runs about 9 hours, with 180 questions in 9 blocks and 13 to 14 CCS cases. Every MCQ block has been 30 minutes since March 2026. Try the updated USMLE software before test day so the layout feels familiar when you sit down.
Step 3 is one piece of a bigger plan. If you’re an IMG working toward a US residency, it helps to see where it fits in your overall USMLE timeline, IMG Helping Hands can guide you through the USMLE pathway and the residency process. Get in touch with the team to plan your next step.
Wondering what score you need? See our guide to the Step 3 passing score and percentiles for IMGs.
Knowing the exam is 16 hours over two days is the easy part. Passing it on a timeline that helps your Match is where we come in:
Articles published by IMG Helping Hands are prepared by our team using information from direct experience, publicly available resources, and educational references. AI tools may be used to assist with drafting, proofreading, and formatting; however, all content undergoes review and approval before publication.
The information provided is intended for educational purposes only. Requirements, policies, and processes may change over time. Readers should consult official sources for the most current information.
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