How to Get Into Caltech: Acceptance Rate, Requirements, & Essays That Worked (2026–2027)
Want to know how to get into Caltech? Learn the acceptance rate, GPA/SAT requirements, and read successful Caltech supplemental essay examples with expert analysis.
Learn everything you need to know to get into Caltech
What You'll Learn
Caltech's STEM Culture
The unique academic environment, low faculty-to-student ratio, and collaborative research opportunities that define the campus experience.
Academic & Course Prep
The essential high school preparation needed, including specific coursework expectations in advanced mathematics, physics, chemistry, and humanities.
Testing & Applicant Profiles
The updated standardized testing requirements alongside the academic metrics and background profile typical of admitted students.
Deadlines & Application Options
The differences between applying early action versus regular decision, including application options and transfer pathways.
Caltech Supplemental Essays
Strategies and successful essay examples for demonstrating authentic passion for STEM, problem-solving skills, and personal fit.
Extracurricular Engagement
How to showcase deep commitment to scientific inquiry, hands-on research projects, and extracurricular achievements beyond classroom grades.
Financial Aid & Costs
Important context on Caltech's need-blind admissions, financial support commitments, and overall cost considerations.
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Caltech overview
If your child has a passion for STEM and is a competitive applicant for Ivy League and Ivy+ schools (e.g., Stanford, MIT), you may be encouraging them to apply to the MIT of the West Coast: Caltech (or the California Institute of Technology). Caltech’s reputation for science and technology will impress future employers, and it doesn’t hurt that this world-class school is located in beautiful Pasadena, just miles north of downtown Los Angeles.
From years of advising students, we’ve assembled some crucial information for you and your child about how to get into Caltech.
At Caltech, the faculty to student ratio is 3:1, so students have unfettered access to their professors and research opportunities. They can pursue research on climate modeling, study neuroscience, predict how powerful the next major earthquake will be in the Seismological Laboratory, or study space and the stars in one of Caltech’s many observatories.
Students can spend their summers interning, researching abroad, or collaborating with faculty thanks to the support of a Summer Undergraduate Research Fellowship. Perhaps they’ll study plate tectonics in Mexico City, or pursue investment banking on Wall Street. They might take an internship in Silicon Valley or build a robot under the guidance of Caltech’s world class faculty.
Caltech graduates go on to be among the most impressive and ambitious scientists alive today. They earn prestigious grants and fellowships, conduct cutting edge research in every STEM field, start companies, become astronauts, serve as political leaders at home and abroad—with a degree from Caltech, the possibilities are endless, all with the help of an extensive alumni network that includes accomplished academics, CEOs, and Nobel Prize and Fields Medal winners.
Indeed, the Caltech name will probably make everyone think that your child is, well, a genius.
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Caltech quick facts
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How hard is it to get into Caltech?
Caltech is the hardest school in the country to get into. Caltech’s acceptance rate is only 3%, lower than those of every Ivy League school and MIT. Only students with a near-perfect academic record, deep STEM engagement outside the classroom, and a genuine fit for Caltech's small, intensely research-focused culture have a realistic shot.
What makes Caltech uniquely difficult isn't just the low acceptance rate: it's the lack of margin for error. Because 99% of all admitted students ranked in the top 10 percent of their high school class, top grades and test scores are simply the price of admission, not a differentiator. Caltech is looking for evidence that your child has already gone deep into a STEM area: independent research, competition results, self-directed projects, or sustained work in a lab. A well-rounded application with strong but generic STEM interest tends to lose out to a narrower application that shows real intellectual obsession.
The takeaway for families: if your child is a strong STEM student but hasn't yet pursued their interests beyond the classroom, Caltech is a reach in a different sense than most "reach schools.” It's less about the numbers and more about whether they can show admissions officers a track record of curiosity-driven work.
Caltech ranking
Caltech is one of those Ivy+ schools that regularly outranks some of the actual Ivy League universities. Here’s where it sits:
Forbes: 24
Niche: 6
Times Higher Education/Wall Street Journal: 6 (US) 7 (world)
Where is Caltech?
Caltech is located in Pasadena, CA—about 11 miles northeast of downtown Los Angeles. Pasadena’s population is approximately 140,000—a small city that is connected to the Greater Los Angeles area (over 12 million) by rail and bus.
Caltech setting
Pasadena is a suburban area with cultural institutions such as libraries and museums, in addition to a variety of cafés, hotels, restaurants, and more.
Caltech student population
Undergrad population: 971
Grad and professional school population: 1,398
Caltech acceptance rate
Here are Caltech’s admissions statistics for the class of 2030:
Acceptance rate: 3%
Applications: 11,404
Enrolled: 247
The Caltech Admissions office does not report their “early action” and “regular decision” rates. There is no known statistical advantage to applying early.
Caltech tuition and financial aid
The 2026–2027 cost of attendance (i.e., tuition, room, board, fees, and personal expenses) at Caltech is $98,622.
Caltech offers need-based financial aid only and is committed to meeting 100 percent of students’ demonstrated need. While financial aid packages may include student loans, the average amount of grant and scholarship aid received by entering students in Fall 2026 was just under $69,000.
Who gets into Caltech?
It’s safe to say that Caltech matriculants rank among the top echelons, academically speaking. Caltech does not publish its average admitted student GPA, but 99 percent of Caltech students ranked in the top 10 percent of their high school class.
Caltech has decided to require standardized test scores in their admissions process for the class of 2030, a change in their policy from the previous year. Caltech doesn’t typically report standardized test score averages each year. However, to give you a sense of Caltech’s high academic standards, here are the average ACT and SAT scores for the class of 2030:
Caltech average ACT score:
25th percentile: 35
75th percentile: 36
Caltech average SAT score:
25th percentile: 1530
75th percentile: 1580
For the class of 2030, Asian students made up the largest percentage of Caltech undergrads at 53.8 percent, white students constituted 14.6 percent, Hispanic Americans made up 5.7 percent, while Black or African American students made up 1.6 percent. International students constituted 12% of this class.
We also know the class comprises 14 countries of residence and that 12 percent are the first in their families to attend college. 32.8 percent of students from the US were from California.
Virtually every Caltech student majors in a STEM discipline. The top intended majors for this class include Mechanical Engineering, Computer Science, Electrical Engineering, Physics, Mathematics, Applied and Computational Mathematics, and Computation and Neural Systems.
Over 90% of our students get into one or more of their top 3 schools
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Caltech admissions requirements
Caltech academic requirements
Like MIT or Harvey Mudd, Caltech is looking specifically for students who have demonstrated excellence in STEM.
Caltech students have excellent grades and some of the highest test scores in the country, but even that isn’t enough.Extracurricular activities and, perhaps most importantly, commitment and enthusiasm for a small number of clubs, STEM projects, or other organizations, also demonstrates excellence.
Your child should have taken every challenging STEM course available to them—including through IB or AP, community college dual enrollment, or summer courses.
On top of that, though, they need to also think about connecting their scientific capabilities—demonstrable through top test scores and adulatory letters of recommendation from STEM teachers—to some urgent problems or questions they care to investigate. It’s not enough for your child to have a knack for math and physics.
Encourage your daughter to think about whether she’s compelled by the mysteries of quantum physics and quantum computing, or if she’s drawn to the rigors of applied physics or engineering. Encourage your son to take a latent talent in the AP Bio classroom to the next level by placing him in a wet lab over the summer, where he can do more than dissect frogs.
To prepare for Caltech’s rigorous core curriculum, here is how Caltech evaluates your child’s academic preparation:
Four years of math, including one year of calculus
One year of physics
One year of chemistry
One year of biology (recommended)
Four years of English
Two years of history and/or social sciences (3+ years recommended)
Caltech application requirements
Here’s the nitty gritty of what it takes to submit an application to Caltech.
Caltech accepts the Common Application, which means your child will need the following to apply:
Caltech supplemental application essays
2 teacher evaluations
1 from a science or math teacher (e.g., chemistry, physics, calculus)
1 from a social science or humanities teacher (e.g., English, history, foreign language)
Secondary school report sent to Caltech from your child’s high school’s college or guidance counselor
Academic transcripts
Caltech also accepts the Coalition Application.
Does Caltech require the SAT or ACT?
Yes, Caltech reinstated standardized testing as a requirement for the Class of 2030. Your child will need to submit either SAT or ACT scores (or both) as part of their application.
Caltech doesn't publish official score ranges each year, but recent admitted classes have posted SAT scores in the 1530–1580 range (25th–75th percentile) and ACT scores of 35–36. Given how competitive the applicant pool is, your child should treat these ranges as a baseline rather than a target. Strong scores are necessary to be competitive, but they won't distinguish an application on their own.
Does Caltech interview applicants?
No, Caltech does not offer or require interviews as part of its admissions process, for either first-year or transfer applicants. This sets Caltech apart from some peer schools that use alumni or admissions-officer interviews to assess fit and communication skills.
Because there's no interview, Caltech's supplemental essays carry extra weight. These essays are the primary place your child can speak in their own voice and show the admissions committee who they are beyond grades, scores, and activity lists.
Need inspiration for your Common App personal statement? Click below for instant access to 25 full-length example essays including advanced breakdowns of why they resonate with admissions committees.
Gain instant access to 25 exclusive full-length examples covering all seven prompts, plus comprehensive analyses for each to help you craft stellar essays.
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Caltech application deadlines: Early Action vs. Regular Decision
Your child can apply early to Caltech by November 1 and receive a decision of either accepted, deferred, or denied, by mid-December.
Caltech follows the restrictive early action (as opposed to early decision or early action) model, which means your child need not commit to attending Caltech if accepted; they can still apply to other universities during those schools’ regular decision process and make their choice by May 1. However, your child is not allowed to apply to other early decision programs with some exceptions. Defer means your child will be re-entered into the pool and will hear back by the end of March, and may be accepted, wait-listed, or rejected then.
Your child can also apply regular decision, by January 4.
How do you know if your child should apply to Caltech early?
Restrictive Early Action might be the right choice for your child if:
Caltech is one of their top choices.
They want to know early if they have been accepted to Caltech, but also want to consider other schools later.
They would like to compare financial aid packages from other schools during the regular decision process.
Their test scores and grades are strong by the end of junior year.
Caltech, like many schools, lets in a significant portion of its class early. This is in part because many highly prepared students choose restrictive early action. These are top candidates who make a great case for themselves to attend Caltech, whose grades and scores are ready, and who are prepared to deepen their expertise in multiple STEM fields.
Most importantly: Caltech doesn’t offer preference to those who apply early.
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Transferring into Caltech
While most Caltech students enter as first-year applicants straight from high school, Caltech recognizes top-notch STEM talent sometimes takes alternative pathways through their educational journeys. Perhaps your child chose to start their college experience somewhere else before realizing Caltech was the place for them, maybe their grades or extracurriculars weren’t quite good enough the first time, or maybe there were family reasons for beginning their education somewhere else.
Whatever the reason, Caltech provides a pathway for students to transfer, but there are a few differences from the normal application process.
Transfer student application process at Caltech
To transfer into Caltech, your child will have to submit two letters of recommendation from math, science, or engineering professors at their current school. They’ll also need official transcripts from their high school and current college, as well as a “College Official’s Report,” the form for which is available through the Caltech applicant portal.
The biggest tasks your child will have to prepare for when transferring into Caltech are the transfer entrance exams. These exams are meant to gauge your child’s ability to succeed academically at Caltech. They presume that your child has already taken courses covering the material in the first year of Caltech’s Core Curriculum. Your child will have about two weeks to complete the two exams. Each exam has a four-hour time limit and cannot be viewed before they are attempted. Additionally, these exams are taken on your child’s honor—meaning no one will be hovering over their shoulder checking whether they’re cheating—but if your child looks up answers and gets accepted, they’ll encounter a reckoning once they actually get to Caltech. Caltech does offer some resources to help in preparing for the tests, so make sure they get their practice in before applying.
Caltech only allows transfer applications for entry in the fall term. Here are some important deadlines to keep in mind.
Transfer application deadline: February 1, 2026
Transfer Exams due: February 15, 2026
Transfer notifications: Mid-April, 2026
Transfer admit reply deadline: June 1, 2026
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Caltech supplemental essays 2026–2027 (prompts, examples, & strategies)
For some STEM students, the Common App personal statement and supplemental essays are a pain. But they’re still a crucial part of the application.
Your child needs to tell a story of why they’re chasing a top-notch STEM education. This is how the admissions department can weed out the merely competent science students from the future science leaders. A leader in STEM can talk about their interests—and they will have to, whether they’re pitching investors as they start a biomedical device company, or writing research papers or popular science books.
How many Caltech supplemental essays are there?
Caltech requires five essays in total: one “STEM Academic Interest” essay, one “Scholarly Character” essay, two “Scientific Drive” essays, and one “Fun” essay, plus one optional “Academic Short Answer” essay. Word limits are tight throughout, ranging from 150 to 200 words, so concision matters as much as content.
“STEM Academic Interest” essay
Caltech notes “Caltech has a rigorous core curriculum and students don't declare a major until the end of their first year. However, some students arrive knowing which academic fields and areas already most excite them, or which novel fields and areas they most want to explore.”
Question: If you had to choose an area of interest or two today, what would you choose? Why did you choose your proposed area of interest? If you selected 'other', what topics are you interested in pursuing? (Min: 150 / Max: 200 words)
Here’s a successful sample essay:
I was always fascinated by the gooey pink brain models my middle school science teacher passed around the classroom, captivated by the idea that you could hold in your hands all of a person’s thoughts, memories, fears, hopes, and dreams. When I took Psychology freshman year, I got intrigued by conditions like ADHD, ASD, and GAD. While I’d never personally lived with any of these conditions, I knew people who did, and I wanted to better understand how they perceive and move through the world.
I soon realized the field of Psychology was a little too subjective for me, focusing more on qualitative data, subjective observation, and theory. When I later discovered Neuropsychology, I knew I’d found my “thing.” In the process of embarking on in-depth research projects under the mentorship of seasoned scientists, I’ve developed a deep interest in cognitive neuropsychology. At Caltech, I hope to work alongside Dr. David J. Anderson on his Neurobiology of Emotional Behavior, Fear, & Anxiety projects to discover how and which neuronal circuits impact the inward perception and outward expression of emotions. I’m particularly interested in the method of synaptic pathway tracing to elucidate the interplay of environment and genetics in emotional dysregulation disorders.
What did this student do well?
This student focuses on an initial fascination of theirs (psychology) and how that interest developed and drove them to pursue a stronger, more specific interest (cognitive neuropsychology). The student thereby shows growth and genuine intellectual curiosity that drives them.
This student expresses interest in working with a specific faculty member who engages in the student’s field of interest and even mentions a particular project that the student would like to assist with that aligns with their interest. In doing so, the student is effectively addressing “Why Caltech?” through an awareness of the types of projects they can engage in and the particular faculty they can work with.
The student’s interest extends beyond a desire to engage with a particular realm of science to a desire to better understand conditions that people live with, demonstrating a drive to produce research that will have a real-world impact on people’s lives and well-being.
“Scholarly Character” essay
Caltech asks: “How do you learn when there is no easy answer? Caltech's learning environment asks students to work through difficulty, collaborate around hard ideas, and contribute to one another's understanding. Use these responses to show us how you learn and grow.”
Prompt: Choose one of the following prompts: (Max: 200 words)
Option 1 -- COLLABORATION: STEM as shared learning
Tell us about a time your learning in STEM was shaped by another person or group — either because you needed help, offered help, changed your thinking through collaboration, or contributed to someone else's understanding. What did that experience teach you about learning and working with others?
or
Option 2 -- PROCESS: The thought behind the outcome
Tell us about a time your approach to a STEM problem, concept, or project mattered as much as the outcome. How did you work through uncertainty or persist creatively in tackling the problem? What would you still defend about your process, regardless of the outcome?
“Scientific Drive” essays
Caltech asks: “How does STEM come alive in your life through learning, pursuing, or making? Caltech faculty review applications, so feel free to get technical in your response!”
Prompt: Choose two of the following prompts: (Two Essays, Max: 200 words each)
Option 1 -- LEARNING: STEM as a never-ending rabbit hole
Regardless of your STEM interest listed above, take this opportunity to nerd out and talk to us about whatever STEM rabbit hole you have found yourself falling into. Be as specific or broad as you would like.
Option 2 -- PURSUING: STEM as sustained intellectual engagement
Tell us about a STEM question, problem, idea, or project that has held your attention over time. What drew you to it, how have you pursued it, and what do you still want to understand?
Option 3 -- MAKING: STEM as creation
Tell us about something you created, tested, repaired, modeled, coded, built, or redesigned. What problem were you trying to solve and what did the process reveal to you?
Here’s a student’s answer to the “learning” prompt:
When I applied to Boston Leadership Institute last summer, their Neuroscience cohort was full, so I decided to expand my horizons and join their month-long Biomedical Engineering camp. There, I saw the lines blur between science and science fiction. I had the privilege of building a foundation in biochemistry and materials chemistry, 3D printing, and the ethics of biotechnology and biomedical engineering.
My mentor, regenerative medicine specialist Dr. Sakthikumar Ambady, provided me with a wealth of resources for my research into stem cell biology and tissue engineering research. And for my final project, I wrote a research paper on how soft tissue biomechanics can revolutionize the way we treat ventricular dysfunction, the leading cause of heart failure. I compiled extensive speckle-tracking echocardiography (STE) data measuring the tissue viscoelasticity of the ventricular wall, in addition to analyzing three studies where stem cell-derived cardiac cells were engineered to form miniature functioning hearts.
What did this student do well?
This student shares an opportunity they took to expand their horizons and engage with a discipline previously beyond their field of interest, which demonstrates genuine curiosity and an ability to adapt to unexpected conditions.
This essay hones in on one particular experience that culminated in a research project that could have a real-world impact on our understanding of a common cause of death. The student thereby shows, rather than tells, an ability to contribute to relevant, impactful research through a detailed account of a specific opportunity.
“Fun” essay
Prompt: Caltech students bring more than academic ability to the communities they join. What is something you would be excited to do, share, teach, make, start, or contribute as part of the Caltech community? (Min: 100 / Max: 150 words)
Optional “Academic Short Answer” essay
Prompt: Caltech cares about context. Is there anything about your academic preparation, coursework, school context, or learning experiences that would help us better understand your readiness for Caltech?
What makes a Caltech essay work?
The strongest Caltech essays share a few traits: they answer the prompt directly rather than circling it, they get specific fast instead of warming up with generalities, and they show, rather than tell, genuine STEM curiosity. Caltech's admissions committee reads thousands of technically accomplished applicants, so an essay that simply confirms "this student is good at STEM" doesn't move the needle. What works is precision: a single experience explored in real depth, a concrete project or moment described in enough detail that it feels lived-in, not generic.
The best essays also connect the applicant's interest to something beyond themselves, e.g., how their curiosity might contribute to Caltech's research culture or a broader community, without turning the essay into a mission statement. Voice matters too: since Caltech doesn't interview, these essays are often the only place the committee hears how your child actually thinks and talks.
Common Caltech essay mistakes to avoid
Here are some common mistakes your child should avoid when crafting their supplemental essays:
Being too broad: Trying to cover every STEM interest in one essay dilutes all of them. Caltech's prompts reward depth on one topic over breadth across many.
Restating the resume: An essay that lists activities and honors already visible elsewhere in the application wastes the one space where your child can explore one experience in real depth.
Skipping the "why": Describing what your child did without explaining why it mattered to them or what it revealed about how they think reads as accomplishment without insight.
Ignoring the word count: Going over or padding to hit a minimum both signal a lack of editing discipline, which matters in a program built around precision.
Sounding like an admissions essay: Overly polished, generic "passion for STEM" language is easy to spot and hard to distinguish from thousands of similar essays. Specific, slightly rough authenticity tends to outperform it.
Gain instant access to essay examples for every supplemental essay prompt from the top universities and BS/MD programs in the United States. Subscribe today to lock in the current investments, which will be increasing in the future for new subscribers.
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Frequently asked questions
Is MIT or Caltech harder to get into?
While the Caltech – MIT rivalry is well-known, the truth is both schools are exceptionally difficult to get into. Both require top-tier GPAs and extracurriculars of applicants, a passion for STEM fields, and a strong fit within their respective cultures.
Caltech’s acceptance rate is slightly lower than that of MIT for the entering class of 2030, but the difference is small. If your child has the stats and drive to gain acceptance at either school, they should focus more on the culture and course offerings at each institution.
For instance, Caltech is focused on science and engineering, while MIT has a wider range of programs including those in the humanities and social sciences. Furthermore, the community at Caltech is smaller and more intimate, while MIT’s larger student body offers a bit more diversity and a variety of extracurricular activities.
Choosing between Caltech and MIT shouldn’t come down to which school is ‘harder’ to get into, but rather be based on your child’s individual interests and goals. Whichever school they choose, they will encounter some of the most rigorous academic programs in the nation with unique opportunities in any field they wish to pursue.
What GPA do you need to get into Caltech?
Many aspiring Caltech undergrads want their application simplified to a specific GPA they need to hit for acceptance. However, as mentioned above, Caltech doesn’t publish the average GPAs of their entering classes, making this number hard to come by.
However, as noted, 99 percent of Caltech students scored in the top 10 percent of their high school class. This means that for your child to have a chance at entry, they would likely need a 3.9–4.0 unweighted GPA or above a 4.0 weighted GPA.
Why is Caltech so prestigious?
When it comes to prestige among universities, Caltech is hard to beat. Its reputation for groundbreaking research, close-knit community, and the unparalleled opportunities it provides to undergraduates can only be found at a handful of institutions worldwide.
Its faculty consists of numerous Nobel laureates, Fields Medalists, and other notable distinctions. The campus culture is renowned for promoting innovation and exploring novel approaches to problems, while its admissions process is extremely selective, meaning only the brightest and most highly motivated students gain entry. All of this fosters an environment of enormous prestige and solidifies its position as a leading institution in science and engineering.
What does Caltech look for in applicants?
Caltech looks for demonstrated excellence in STEM: not just top grades and test scores, but evidence that a student has pursued math, science, or engineering beyond what their coursework requires. That might mean independent research, competition results, self-directed projects, or sustained work in a lab. Caltech also values depth over breadth. A student with deep expertise and genuine curiosity in one or two STEM areas is generally a stronger candidate than one with broad, surface-level interest across many. Beyond academics, Caltech is looking for a fit with its small, intensely collaborative research culture, including students who thrive on rigor and want to be surrounded by peers as STEM-obsessed as they are.
What is Caltech's yield rate?
Based on Caltech's published Class of 2028 statistics, 222 of the 315 admitted students chose to enroll, a yield rate of about 70%. That's a notably high yield for a school with such a small entering class, reflecting how few students admitted to Caltech turn it down, largely because most applicants who apply already know it's a top choice rather than a safety or a "maybe."
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Final thoughts
Fewer than 1,000 students matriculate at Caltech each year, so you can tell that it’s no easy task to get in. That’s why your best bet is to not only seek out and ace a challenging science curriculum, but also to pursue that science creatively outside the classroom.
About the Author
Dr. Shirag Shemmassian is the Founder of Shemmassian Academic Consulting and one of the world's foremost experts on college admissions. For over 20 years, he and his team have helped thousands of students get into top programs like Harvard, Stanford, and MIT using his exclusive approach.
THERE'S NO REASON TO STRUGGLE THROUGH THE COLLEGE ADMISSIONS PROCESS ALONE, ESPECIALLY WITH SO MUCH ON THE LINE. SCHEDULE YOUR COMPLIMENTARY CONSULTATION TO ENSURE YOU LEAVE NOTHING TO CHANCE.
