How to Convert the Mexican Grading System to a US GPA (2026)

Most Mexican universities grade on a 0 to 10 scale, with 6 as the usual minimum passing grade. UNAM's Faculty of Engineering states this directly in its own exchange documentation, citing UNAM's General Examination Regulations: 6 passes, 5 and below fails. Universidad Anáhuac's published grading scale uses the same 0-10 range with the same 6.0 floor. That consistency is actually the easy part, and it's also where most applicants stop looking. The harder part is that not every well-known Mexican university uses that scale at all, that the handful of published conversion tables for this exact scale don't agree with each other, and that no single Mexican authority issues one official table the way some other countries' ministries of education do. Treating this as a one-line math problem can genuinely misrepresent a strong transcript in either direction.

The 0-10 scale isn't actually universal in Mexico

If you studied at UNAM, Universidad Anáhuac, or most public and private Mexican universities, your transcript almost certainly reports grades as whole or one-decimal numbers on a 0-10 scale, 10 being the highest and 6 the usual floor to pass a course. But Tecnológico de Monterrey, one of the country's most internationally recognized universities and a common source of the Mexican transcripts US graduate programs actually see, doesn't use that scale at all. Tec's own EGADE Business School transcript documentation states plainly that Tec grades on a 1 to 100 scale, with 100 as excellent, 90-99 as very good, 80-89 as good, 70-79 as average, and anything under 70 failing, 70 being the minimum passing grade for every course. A partner-university articulation sheet from Illinois State maps that same 1-100 Tec scale to US letter grades on its own terms, 90-100 to an A, 80-89 to a B, 70-79 to a C, which is a completely different conversion problem than the one a 0-10 UNAM transcript presents. If you're reading a Mexican transcript and assuming it's on the familiar 0-10 scale without checking, Tec de Monterrey is the single most likely case where that assumption breaks.

Even on the 0-10 scale, the published tables don't agree

Run the same 0-10 Mexican grade through different published references and you can land on different US letter grades. Wikipedia's academic-grading page for Mexico bands 9.0-10.0 as an A, 8.0-8.9 as a B, and 6.0-7.9 as a C or D. A University of Washington graduate-school GPA conversion guide lists the same scale slightly differently, 9-10 as an A, 8 as a flat B, and 6-7 together as a C. A sample evaluation published by InCred, a credential-evaluation firm, used yet another banding, 9.0-10.0 as an A, 7.0-8.9 as a full B band, and 5.0-6.9 as a C. Commercial calculator sites split it differently again, SmartCGPA maps 7.0-7.9 to a C and 6.0-6.9 to a D rather than lumping both into a C, while Qogent's study-abroad guide converts 6.0-6.9 straight to a 2.0 quality point with no separate D tier at all. Put a flat 7.0 through these and you get a C under three of them but sit at the very top of a wider B-adjacent band under InCred's sample table. None of these sources is wrong exactly, because none of them claims to be the one official standard, and that's precisely the problem: there isn't one.

No Mexican authority publishes one official conversion table

It's worth being direct about something most generic grade-conversion calculators gloss over: no Mexican federal agency, university consortium, or single international standard publishes one authoritative Mexico-to-US GPA table. SEP, the Secretaría de Educación Pública, sets grading rules for basic and upper secondary education, where a 0-10 boleta and a 6.0 pass mark are genuinely standardized nationally, but SEP doesn't impose a uniform grading scale on higher education the way it does on secondary school. Each university writes its own reglamento general de exámenes, which is exactly why UNAM, Anáhuac, and Tec de Monterrey can legitimately use different scales and different pass marks under the same national education system. A search of WES's own public grade-conversion resources doesn't surface a standalone, published Mexico breakdown the way it does for some other countries in this series, which leaves applicants choosing between Wikipedia's table, a NAIA/InCred eligibility standard built for a different purpose, and assorted commercial calculators, each built independently and each disagreeing with the others on where the letter-grade bands actually start and end. A separate German academic exchange office (DHBW) converts the same Mexican 0-10 scale to Germany's 1.0-5.0 system with a straight linear formula instead, for universities like Anáhuac and ITESO specifically, 10 maps to 1.0 and 6 maps to 4.0, which shows that even the basic approach, banded tiers versus a continuous formula, isn't settled across the organizations that actually work with this scale. That's exactly why a formal, agency-issued evaluation matters here: the agency's own table, not a calculator's, is what actually gets treated as authoritative by the university reading your application.

Mención Honorífica is a graduation honor, not a GPA figure

Mención Honorífica shows up on plenty of Mexican diplomas and transcripts, and it's easy to mistake for a GPA-adjacent figure when it isn't one. It's a distinction awarded at the thesis defense or professional exam stage, typically requiring a minimum cumulative promedio, a strong thesis or exam performance, and a unanimous or near-unanimous vote from the examining jury, with the exact rule set independently by each faculty's own lineamientos de titulación rather than by one university-wide or national standard. That variation shows up even inside a single university: published facultad-level requirements at UNAM describe a minimum promedio of 9.5 for its highest academic-distinction titling track, while other secondary sources describe UNAM's Mención Honorífica threshold as 9.0 instead. Both figures come from real sources, and the honest answer is that it depends on which faculty and which titling modality a specific transcript falls under. What matters for a US application is keeping the two numbers separate: your promedio is the figure that actually converts to a US GPA, Mención Honorífica is a separate, binary honor your university either did or didn't award, and listing it as context on an application is fine, but it shouldn't be substituted for, or blended into, your converted GPA.

Your promedio is usually credit-weighted, don't recompute it unweighted

Mexican universities generally track cumulative academic standing as a promedio ponderado, a credit- weighted average where each grade is multiplied by that course's créditos (commonly tracked under the SATCA credit system), the products summed, and the total divided by total credits, rather than a flat, equally-weighted average of every grade. UNAM's own academic-performance tracking works this way. A generic online calculator that simply averages every listed grade with equal weight, ignoring individual course credit values, can produce a different cumulative figure than the one your actual transcript reports, and a different one again from what a formal evaluator recalculates from your official record. If you're sanity-checking a converted number before a formal evaluation comes back, use the promedio your university's own transcript or academic portal already states rather than recomputing an unweighted average from your individual course grades.

Whether you actually need a formal evaluation

This depends on the specific program, and it's worth confirming directly rather than assuming. Some US graduate programs require a sealed, course-by-course credential evaluation from a NACES-member agency, most commonly WES or ECE, before they'll even review an international application. Others accept a self-reported conversion alongside your original Mexican transcript, to be formally verified only after an admission offer. Some programs evaluate your original 0-10 or 1-100 transcript directly without requiring any US-scale conversion at all. Our comparison of WES, ECE, and IQAS covers how each evaluator actually works and which one a given program is more likely to require, and our guide to transcript and degree certificate requirements covers when a formal evaluation is genuinely necessary versus when the original transcript alone will do. Our guide to converting the Colombian grading system shows the same pattern, no single official table, evaluator tables that disagree, playing out on a different Latin American grading scale.

If the converted number still undersells a strong record

Even a correctly band-based conversion can leave a genuinely strong Mexican transcript looking flatter than it should, particularly since grades above roughly 9.5 are intentionally rare at some institutions and most of the real work of distinguishing students happens in the 7-9 range, right where the recognized tables disagree most. Where that happens, two things are worth doing rather than accepting the number silently. First, check whether your target program looks at individual course grades in subjects directly relevant to the research you want to do, alongside or instead of a single aggregate GPA figure, since that's often what a specific professor actually cares about. Second, a brief, factual note on your application, your transcript uses your university's standard grading scale with its stated pass mark, and your strongest grades sit near the top of that range, gives an admissions reader useful context without reading as an excuse.

A converted GPA is also only one input into whether a specific professor decides to personally fund your research off their own grant, and it's rarely the deciding one. Our piece on why research fit matters more than GPA covers why a professor evaluating you for their own lab is typically reading your actual coursework, research experience, and fit with their current work far more closely than a single converted number on an admissions form. That's exactly why a well-targeted cold email to a specific professor is worth running in parallel with the formal application and its credential evaluation, not instead of it. GradScoutFunding searches professors by field and country, confirms they're actively publishing, and drafts a personalized outreach email grounded in one of their real recent papers, so a professor is evaluating your actual research background directly rather than only a converted GPA figure. Every draft is yours to review and send yourself, nothing goes out automatically. Our guide to PhD and Masters funding for Mexican students abroad covers the scholarship routes alongside this one, and our guide to finding a PhD supervisor in Mexico covers the reverse direction, funding for studying inside Mexico rather than abroad. The free tier gives you 100 credits with no card required, and paid credit packs are one-time purchases that never expire.

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