How Many Credits Should You Take Per Semester? How to Work Out the Real Load
There is no single right number, and whoever gives you one doesn't know your schedule. A credit measures classroom hours, not load — to know how many to take you need to convert credits into real weekly working hours, and compare them against the hours you genuinely have free. It's a ten-minute calculation, and it happens before registration.
What credits actually measure
One credit usually represents one weekly classroom hour across a semester. A 3-credit course is usually three weekly lecture hours.
Notice what that means: a credit is a measurement of classroom time, not of the amount of work. It doesn't know whether the course demands a weekly problem set, a cumulative project or heavy reading. Two 4-credit courses can demand completely different amounts of your time — and the system will present them as identical.
That's why students get the calculation wrong: they count points, and plan as if that's the whole story.
The conversion: from classroom hours to real hours
The accepted rule of thumb is two to three times: for every lecture hour, one to two hours of self-study — reading, problem sets, submissions and review.
That's a starting point, not a fact. (The semester load calculator does this calculation for you, including work and commuting.) The ratio varies a lot between a theoretical course and a project course, and between people. Two weeks into the semester you'll know your real number — and then it's worth coming back to this calculation and updating it.
An example calculation with 18 credits and a factor of 2.5:
53 hours a week is a full-time job and a half. Now the real question: how many free hours do you actually have in a week? If you work 20 hours, the numbers don't add up — and that's something better discovered in September, not in November.
So is 18 credits a lot? The common numbers, translated
This is the question people actually ask — not “how do I plan my load” but “is this number a lot?”. Here's the same calculation from above, applied to the numbers that come up the most. The hours are classroom plus self-study at a 1:1.5 ratio, without commuting — add that separately.
| Credits | Weekly hours | Who it fits |
|---|---|---|
| 12 | ~30 | Reduced load. Often below the full-time threshold — check first |
| 15 | ~38 | Reasonable for someone working a substantial part-time job |
| 18 | ~45 | The standard pace most programs are built around |
| 20 | ~50 | Full load. Possible, but with little margin for error |
| 22 | ~55 | Heavy. Reasonable only without a job and without especially heavy courses |
| 24 | ~60 | Very high. Works only if some of the courses are genuinely light |
For context: at most institutions in Israel a full load is considered roughly 18–24 credits, and a typical bachelor's degree is 120–160 credits spread across 6–8 semesters. That explains where the “standard” of 18–20 comes from — it's simply what's needed to finish on time, not an assessment of what you can handle.
Which is why the number alone doesn't answer the question. 20 credits of theoretical courses with a final exam are not 20 credits with two projects and weekly submissions. The row in the table is a starting point; what decides it is the four factors right below.
Four things that change the calculation
| Factor | What it does to the load |
|---|---|
| Course type | A course with a cumulative project or weekly submissions demands far beyond the usual ratio. A course with a single final exam concentrates at the end, but then it's very heavy |
| Work | Not just the hours themselves — also changing shifts, which make fixed weekly planning impossible |
| Commuting | The most commonly forgotten factor. Two long days on campus beat four short ones, even at the same number of credits |
| Deadline overlap | Five courses whose submissions all land in the same week are harder than six courses spread out |
The last one deserves an active check: open the syllabi before registration and mark the submission dates. If three of them fall on the same week in mid-November, you know it now rather than then.
What to check before dropping a course
Before dropping a course, check two things in your institution's regulations:
- The minimum to count as a full-time student — that threshold differs between institutions
- What falling under it does to you — scholarships, student housing, tuition discounts, national insurance and other entitlements are often derived from that status
I deliberately didn't put numbers here: they genuinely differ between institutions, and a wrong number in a decision that touches money is worse than no number at all. The faculty office will give you your exact figure in one conversation.
Subject to that — dropping one course early usually beats failing two late. A course dropped during the add/drop period doesn't appear on the transcript. A course you failed does.
Dropping a course mid-semester
This is different from dropping during the add/drop period, and it's worth understanding the difference before you get there. There are usually three windows, each with a different price:
| When | What actually happens |
|---|---|
| The add/drop period | The course disappears as if you never registered. No mark on the transcript, and tuition is usually refunded |
| After add/drop, before the withdrawal deadline | A withdrawal mark usually appears on the transcript, without a grade and without affecting the average. Tuition usually isn't refunded |
| After the withdrawal deadline | You can't drop. From here on there's a grade, and not showing up means failing |
These dates and rules differ between institutions, and sometimes between faculties at the same institution. Your exact date is in the academic calendar, and the consequences for the transcript and tuition are in the regulations. It's worth opening both once at the start of the semester and marking the date in your calendar — that's the moment the option closes without anyone reminding you.
When dropping mid-semester genuinely makes sense: when one course is draining time from all the rest. A student who drops a course in week six and saves three others did the math right. Whoever holds on to all of them and fails two paid for the same decision twice — once in time, and once on the transcript.
How to check it in practice, before registering
The calculation above gives a number. But a number doesn't show you how the week feels — and that's where the real decision lives. Sketch the week:
- Draw a weekly board — Sunday to Thursday in Israel, Monday to Friday elsewhere
- Fill in the lectures and tutorials of the courses you're considering
- Add work, commuting and fixed commitments
- Now try to find room on that board for the 27 hours of studying
If you can't find it — you won't find it in November either. That's the whole test, and it takes ten minutes. The guide to building a semester timetable goes through this sketch in detail.
If you already registered for too much
Don't decide in the first week. It's always easy, because there are no assignments in it yet, and it will give you a misleading sense that everything is fine.
Let two weeks pass, then look at one real week: how many hours actually went to each course. Now you have data instead of an estimate. If it's bigger than the time you have — that's the moment to drop, inside the add/drop period.
Frequently asked questions
Is 18 credits a semester a lot?
18 credits is the standard pace most degree programs in Israel are built around, and in real hours it's roughly 45 a week before commuting. It isn't “a lot” or “a little” by itself — it depends on how many of the courses include a project or weekly submissions, and on how many hours you work. The same number can be comfortable for one person and impossible for another.
Can you drop a course in the middle of the semester?
Usually yes, up to a withdrawal deadline that appears in the academic calendar — but the price depends on when. During the add/drop period the course disappears without a trace. After it and before the withdrawal deadline, a withdrawal mark usually stays on the transcript without a grade, and tuition usually isn't refunded. After the withdrawal deadline you can't drop, and missing the exam counts as a fail. The dates differ between institutions and sometimes between faculties.
What is a credit, actually?
One credit usually represents one weekly classroom hour across a semester. A 3-credit course is usually three weekly lecture hours. It's a measurement of classroom time — not of the amount of work the course demands from you outside it.
How many real working hours are in each credit?
A common rule of thumb is two to three times: for every lecture hour, one to two hours of self-study. That's a starting point for the calculation, not a fact — the ratio varies a lot between a theoretical course and a project course, and between people. Two weeks into the semester you'll know your real number.
Should I drop a course if the load is too heavy?
Dropping one course early usually beats failing two late. But before dropping you must check two things at your institution: the minimum required to count as a full-time student, and what falling under it does to your scholarship, housing, tuition discount and other entitlements. That threshold differs between institutions.
Why do two students with the same credits experience completely different loads?
Because credits don't measure difficulty. Four credits in a theoretical course with a single exam and in a course with a cumulative project and weekly submissions are the same number in the system — and not the same thing in the schedule. Commuting, work and the number of overlapping submissions change the picture too.
I already registered for too many courses. What now?
Don't decide in the first week — it's always easy and misleading. Let two weeks pass, then look at one real week: how many hours actually went to each course. If the number is bigger than the time you have, that's the moment to drop — inside the add/drop period, before it shows up on the transcript.
See the load before you register
The calculation gives a number. The sketch shows whether it works. Both work on paper — and that's not a polite disclaimer, there's no step here that requires a tool.
Focusity does it from your real timetable: imports the courses and the credits, works out how much free time is actually left, and schedules the study blocks into it. If there isn't enough room — you see it on the board, instead of discovering it in November.
Build my plan — free