Engineering (all disciplines), architecture, physics, chemistry, and nursing consistently rank among the hardest college majors based on average GPA, weekly study hours, and attrition rates. Engineering students study 19-22+ hours per week outside class, carry average GPAs around 2.9-3.1, and face 40-50% attrition from their programs. But difficulty and career payoff are closely correlated — the hardest majors generally lead to the highest starting salaries.
If you're in a hard major and feel like you're drowning, this data validates your experience. It really is that demanding. If you're considering a hard major and want to know what you're signing up for, the numbers tell a clear story.
But here's what the "hardest majors" conversation usually misses: difficulty is only meaningful in context. A major that's brutally hard for someone who hates math is perfectly manageable for someone who finds math satisfying. The relevant question isn't "what's the hardest major" — it's "what's the hardest major for me, given my strengths and weaknesses?"
Key Statistics at a Glance
The Hardest Majors by Multiple Measures
Difficulty can be measured several ways. Here are the majors that rank high on most or all of them:
Engineering (All Disciplines)
Engineering is consistently the most time-intensive major. Students report 19-22+ hours of study per week outside class, carry some of the lowest average GPAs, and face prerequisite chains where failing one course can delay graduation by a full year.
What makes it hard: calculus through differential equations, physics, lab work, design projects, and strict sequencing. You can't take Thermodynamics until you've passed Calculus III, which means a bad semester in math cascades forward. Attrition rates of 40-50% reflect students who switch to less demanding programs, often after the first two years of foundational math and science.
The payoff: engineering graduates have among the highest starting salaries of any bachelor's degree, typically $65,000-$80,000.1 For the full career picture, see our engineer career guide.
Architecture
Architecture combines the technical demands of engineering with the creative demands of design. Studio culture is notoriously time-intensive — students regularly pull late nights or all-nighters working on design projects. The five-year undergraduate programs (B.Arch) are longer than standard four-year degrees, adding both time and cost.
Study hours rival or exceed engineering. The combination of structural analysis, design theory, drafting, model building, and history coursework creates one of the broadest skill demands of any major.
Physics
Physics requires advanced mathematical thinking (calculus-based mechanics, electromagnetism, quantum mechanics, statistical thermodynamics) and abstract problem-solving that most students find significantly more challenging than other STEM fields. Average GPAs are among the lowest.
The subject is inherently cumulative — each course builds heavily on the previous one. Students who struggle with introductory mechanics face compounding difficulty in later courses.
Chemistry and Biochemistry
Organic chemistry is notorious for a reason. The course requires memorizing hundreds of reactions while simultaneously developing intuition for molecular behavior. Pre-med students who struggle with organic chemistry often reconsider their career plans entirely.
Beyond organic chemistry, physical chemistry (which combines chemistry with advanced physics and calculus) is another major filter point. Lab work adds hours per week that don't appear in credit-hour calculations.
Nursing
Nursing combines demanding science coursework (anatomy, physiology, microbiology, pharmacology) with high-stakes clinical rotations where mistakes can affect patient safety. Many nursing programs require minimum grades of B in core courses — a C means repeating the course.
Clinical hours add 12-20 hours per week on top of regular coursework during the final two years of the program. The academic pressure is compounded by the emotional demands of patient care. For the broader healthcare career picture, see our social worker career guide as a comparison.
Computer Science
CS is math-intensive (discrete math, algorithms, data structures, computability theory) and requires the ability to think in abstractions that many students find genuinely disorienting. Coding assignments are graded objectively — the program works or it doesn't — which creates higher failure rates than subjectively graded work.
The difficulty is frontloaded. Introductory programming and data structures courses have high failure rates, but students who survive the first two years generally find upper-division courses more manageable. See our software engineer career guide for where this path leads.
If you're in a hard major and struggling, the single most effective intervention is forming a study group. Research consistently shows that students in collaborative learning environments earn higher grades than students who study alone, and the effect is strongest in STEM fields where problem-solving is the primary skill. Find 3-4 people in your courses and commit to regular study sessions. Our guide on how to study effectively in college covers additional strategies.
Study Hours by Major
The National Survey of Student Engagement tracks self-reported study hours:2
Highest study hours (19-22+ hours/week outside class):
- Architecture
- Engineering (all disciplines)
- Nursing (clinical years)
- Physics
High study hours (17-20 hours/week):
- Computer science
- Chemistry/biochemistry
- Mathematics
- Pre-medical biology
Moderate study hours (15-18 hours/week):
- Accounting
- Economics
- Political science
- Education
Lower study hours (12-16 hours/week):
- Business administration
- Communications
- English/literature
- Social work
These numbers represent averages. Individual courses within any major can demand significantly more or less time.
Study hours data is self-reported and tends to overestimate time spent studying while underestimating time spent in other academic activities (office hours, group projects, lab prep). Take the specific numbers as relative comparisons between majors rather than absolute measurements. The pattern — STEM fields require more time than non-STEM fields — is consistent and reliable even if the exact hours are approximate.
Attrition and Switching Rates
One of the clearest indicators of difficulty is how many students switch out of a major:
Engineering: 40-50% of students who declare engineering switch before graduating. Most switch during the first two years after encountering the full weight of calculus, physics, and chemistry simultaneously. Many switch to business, general science, or technology management.1
Pre-medical track: While not a major, the pre-med track sees substantial attrition. Many students who enter college planning to become doctors abandon the path after organic chemistry or after calculating the timeline and cost of medical school.
Computer science: Growing enrollment has coincided with significant attrition, particularly in the introductory programming sequence. Students who entered because of salary expectations rather than genuine interest in computing often switch after their first difficult coding course.
Physics and mathematics: These smaller programs have lower raw attrition numbers but high proportional switching. Many physics and math students transfer into engineering or computer science, which feel more directly career-connected.
Switching out of a hard major is not a failure — it's often the smartest decision a student can make. Research shows that students who switch from a poor-fit major to a better-fit one earn higher GPAs, are more likely to graduate on time, and report higher satisfaction than students who grind through a major they hate. The cost of switching is typically one or two extra semesters. The cost of not switching can be years of misery and a transcript full of C's.1
The Difficulty-Salary Connection
There's a strong correlation between major difficulty and starting salary. The hardest majors generally produce the highest-earning graduates:
The engineering, computer science, and nursing fields — all ranked among the hardest — consistently appear in the top tier of starting salaries for bachelor's degree holders. Business and communications — perceived as easier — produce moderate starting salaries. Education and social work — also perceived as easier — produce lower starting salaries.
This correlation exists because harder majors develop specialized skills that are scarce and in demand. Employers pay premiums for skills that few people can acquire.
However, correlation isn't destiny. The highest earners in "easy" majors often out-earn the average earner in "hard" majors. A communications major who becomes a VP of Marketing earns far more than an average engineer. The difficulty of the major affects your starting position, not your ceiling.
For the full salary picture, see our highest-paying college majors guide and lowest-paying college majors guide.
What This Means for Students
If you're considering a hard major: Go in with eyes open. The first two years will test your commitment. Build support systems early — study groups, tutoring, faculty office hours. And be honest with yourself about whether you're choosing the major because you're genuinely interested or because of external pressure.
If you're currently struggling in a hard major: Distinguish between productive struggle (the material is hard but you're learning) and unproductive struggle (you've lost interest and are just surviving). The first is normal and temporary. The second is a signal to reassess.
If you're thinking about switching: Talk to your academic advisor about how switching affects your graduation timeline and financial aid. Many switches add 0-2 semesters, which is a manageable cost compared to years in a bad-fit major. Check our guide on how to choose a college major for a structured decision framework.
FAQ
What's the single hardest college major?
By most measures, it's a toss-up between chemical engineering and architecture. Chemical engineering combines the most demanding coursework (organic chemistry, thermodynamics, fluid mechanics, process control) in a heavily sequenced curriculum. Architecture combines technical difficulty with extreme time demands. Both have high attrition rates and low average GPAs.
Is a hard major worth it for the salary?
On average, yes. The salary premium for engineering and computer science graduates over the first 10 years of their careers can exceed $200,000-$500,000 compared to average-paying majors. But averages don't apply to individuals. If you're miserable in engineering, you won't perform well, which limits your salary anyway. The best ROI comes from a major that's challenging enough to develop valuable skills but interesting enough to keep you engaged.
Can I succeed in a hard major if I wasn't great at math in high school?
It depends on how "not great" you were and in what specific areas. If you earned B's in math, you can likely succeed with extra effort and tutoring. If you consistently earned C's or below despite genuine effort, STEM majors that require calculus and beyond will be an uphill battle. Be honest about your starting point.
Do hard majors have curved grading?
Many do. Engineering and physics courses often curve grades so that the average falls around a B- or C+. This means a 70% raw score might translate to a B. Curves help with absolute performance but don't change relative difficulty — you're still competing against other students in the same challenging material.
Is it better to have a low GPA in a hard major or a high GPA in an easy major?
For employers: it depends on the role. Technical jobs (engineering, data science) require the hard major regardless of GPA. Non-technical jobs often prefer the high GPA regardless of major. For graduate school: admissions committees understand major difficulty and contextualize GPAs accordingly, but a very low GPA (below 3.0) is hard to overcome regardless of major difficulty.
Footnotes
-
National Center for Education Statistics. (2024). Undergraduate Retention and Graduation Rates. NCES, U.S. Department of Education. https://nces.ed.gov/programs/coe/indicator/ctr ↩ ↩2 ↩3
-
National Survey of Student Engagement. (2024). Annual Results: Student Engagement and Learning. Indiana University Center for Postsecondary Research. https://nsse.indiana.edu/ ↩
-
Rojstaczer, S., and Healy, C. (2012). Where A Is Ordinary: The Evolution of American College and University Grading, 1940-2009. Teachers College Record, 114(7). https://www.gradeinflation.com/ ↩