What a science GPA is, and why it exists
Your science GPA is a second GPA built only from your science and math courses, separate from the overall GPA that pools everything you have taken. Medical and health-professional applications call it the BCPM GPA, after the four subject areas it draws from: Biology, Chemistry, Physics and Math. Admissions committees compute it because your overall GPA can hide how you did in exactly the coursework their programs lean on — a 3.7 overall means something different when the science half sits at 3.9 versus 3.3. The calculator above builds your science GPA the same credit-weighted way an application service does, live as you type, with nothing sent to a server.
The science GPA formula
GPA = (sum of grade points × credits) ÷ (total credits)
The math is identical to any college GPA — it is a credit-weighted average — you simply restrict the courses to BCPM. Each letter maps to grade points: A/A+ = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, C+ = 2.3, C = 2.0, C- = 1.7, D+ = 1.3, D = 1.0, D- = 0.7, F = 0.0. Multiply each science course’s grade points by its credit hours to get its quality points, add the quality points across every BCPM course, and divide by your total BCPM credits. For the full letter, percentage and point tables see the GPA scale, and for the step-by-step method read how to calculate your GPA.
How to use this calculator for both GPAs
The tool gives you two numbers with two passes. First, enter only your BCPM courses — every Biology, Chemistry, Physics and Math class, with its grade and credits — to read your science GPA. Then, to see your cumulative GPA for comparison, clear the list and enter all of your courses, or open the dedicated college GPA calculator or cumulative GPA calculator in another tab. Seeing the science and overall figures side by side is exactly the comparison an admissions committee makes.
Worked example: a semester of BCPM courses
Suppose these five science and math courses make up your BCPM list. Convert each grade to points, multiply by credits, and total the quality points:
| Course | Grade | Points | Credits | Quality points |
|---|---|---|---|---|
| General Biology I | A | 4.0 | 4 | 16.0 |
| General Chemistry I | B+ | 3.3 | 4 | 13.2 |
| Organic Chemistry I | B | 3.0 | 3 | 9.0 |
| Physics I | A- | 3.7 | 4 | 14.8 |
| Calculus I | B- | 2.7 | 3 | 8.1 |
The quality points total 61.1 over 18 credits, so your science GPA is 61.1 ÷ 18 = 3.39. The 4-credit courses pull harder on the average than the 3-credit ones — that credit weighting is why an A in a 4-credit lab science moves your science GPA more than the same grade in a 3-credit class.
Why your verified science GPA can differ from your transcript
Here is the part that surprises the most students. The application services — AMCAS for MD programs and AACOMAS for DO programs — recalculate your GPA rather than copying your school’s. They convert every college’s grades to one common scale, and, critically, they include every attempt of a course. If your undergraduate school uses grade replacement or grade forgiveness, your transcript may show only the newer grade, but the application service counts both the original and the retake. A failed or repeated science course therefore still weighs on your verified BCPM GPA. To mirror how they compute it, enter every attempt here — not just the grade your school kept.
What counts as BCPM — and the honest caveats
As a rough guide, these fall under the science GPA:
- Biology — general biology, and most life sciences such as genetics, microbiology, anatomy and physiology.
- Chemistry — general and organic chemistry, plus biochemistry.
- Physics — general and advanced physics courses.
- Math — calculus, statistics and other mathematics courses.
But classification is not always obvious, and it is the application service, not your college, that decides. Psychology and sociology usually count toward the non-science GPA even though the MCAT tests them; some biology-adjacent or health-science courses can land in either bucket; and services occasionally reclassify a course from how your school labels it. So treat the list above as a starting point, not gospel — verify each course’s category against the current AMCAS or AACOMAS course-classification guidance (or the guidance for whichever service you are using) before you trust your number.
Why a strong science GPA matters
A healthy science GPA reassures a committee that you can handle a curriculum built almost entirely from science. Because it is reported separately, it cannot hide behind strong grades in other subjects, so a science GPA that tracks close to your overall GPA reads as steady, dependable performance. A science GPA that sits well below your overall can raise a question — though it is one that a clear upward trend, later coursework, or a strong MCAT can help answer. Rather than chase a single cutoff, aim for consistency, and judge yourself against a program’s published class profile instead of a number you saw quoted somewhere. If you want to move the figure, the guide to raising your GPA works through the realistic math of how much each new term can shift a large existing record.
Beyond medical school
The science-GPA idea is not unique to MD and DO programs. Dental (AADSAS), pharmacy (PharmCAS), physician-assistant (CASPA), veterinary (VMCAS) and many graduate science programs also compute a science or prerequisite GPA — each defining the included courses a little differently. The underlying question is always the same: how did you perform in the science coursework this specific path depends on? Build your list from whatever courses that application counts, verify the categories with its service, and the calculator above handles the arithmetic the same way. For a plain overall figure across every course, use the main GPA calculator or the high school GPA calculator for earlier coursework.
Last updated September 2026. Course classifications and recalculation rules are set by each application service and change over time; always verify how your science GPA is computed with your school or the application service before you rely on it.