How Many Credit Hours Is a Bachelor's Degree?
120 semester credit hours at a U.S. college — or 180 quarter credit hours if your school runs on quarters. An associate degree is 60 semester hours; a master's is typically 30 to 60.
If you have seen the number 360, you were reading about the British credit system, where one credit equals 10 hours of study. That number is correct in the UK and wrong in the United States. The two systems are not convertible one-for-one.
Credit hours by degree level
| Degree | Semester hours | Quarter hours | Typical length | Notes |
|---|---|---|---|---|
| Associate | 60 | 90 | 2 years | AA / AS / AAS |
| Bachelor's | 120 | 180 | 4 years | BA / BS |
| Master's | 30–60 | 45–90 | 1–3 years | 按学科差异很大 |
Quarter hours convert at 1.5 to 1 — 120 semester hours is 180 quarter hours. That ratio is not stated as a conversion formula anywhere in federal regulation; it is implied by the parallel figures federal rules use for the two systems, and individual schools round the result differently. Two students with identical transcripts can end up one or two credits apart depending on whose rounding rule applies.
Where the 120 comes from — and why it is not a federal rule
This surprises people: no federal regulation says a bachelor's degree requires 120 credit hours. Federal rules define what a credit hour is (34 CFR 600.2) and how clock hours convert into credits (34 CFR 668.8), but the number of credits in a degree is set by regional accreditors and state authorities. Every U.S. regional accreditor lands on 120 for a bachelor's, which is why the number is effectively universal — but the authority behind it is accreditation, not the Department of Education.
Practical consequence: your school's catalog is the binding number, not this page. Some programs require 122, 124, or 128 — engineering and architecture routinely exceed 120.
Why some pages say 360 credits
Search results for this question mix two countries' systems. In the UK framework, one credit represents 10 notional hours of study, and an honours bachelor's degree is 360 credits — 120 per year across three years. In the U.S., one semester credit hour represents roughly one hour of class plus two hours of outside work per week over a term, and a bachelor's is 120 total.
| United States | United Kingdom | |
|---|---|---|
| Bachelor's degree | 120 semester hours | 360 credits |
| One credit means | ~1 hr class + 2 hr work / week / term | 10 notional study hours |
| Typical year | 30 semester hours | 120 credits |
The systems measure different things, so there is no clean multiplier between them. If you are applying to a U.S. school with a UK transcript — or the reverse — the receiving institution does its own evaluation rather than converting by formula.
How transfer credits count toward the 120
Transfer credits count toward the 120 required for the degree, but most schools also impose a residency requirement — a minimum number of credits that must be earned at the institution granting the degree, commonly 30 for the final year. So a student transferring 90 credits into a 120-credit program still has 30 to complete on campus, even if the transfer credits technically cover more of the requirements.
The 120 that matters for financial aid is not the same 120
Here is the part almost nobody spells out. Federal aid rules track a separate number: under 34 CFR 668.34, you must finish your program within 150% of its published length. For a 120-credit degree that ceiling is 180 attempted credits.
Transfer credits are counted as both attempted and completed hours. That means they do not damage your completion rate — but they do consume your 180-credit ceiling. Transfer 60 credits in, and 60 of your 180 are already spent before you take a single class. "The more credits I transfer, the better" is good advice for graduation and bad advice for aid eligibility, and the two are usually explained by different offices.
How part-time enrollment cuts your loan limit →
Rules verified against primary sources on 2026-08-08.