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

Portugal grades on a 0-20 scale, not a percentage and not a 4.0 GPA, with a pass mark of 10 and real grades above 17 rare enough that a naive straight-line conversion to a US scale tends to undersell a genuinely strong result. There's an official government body that publishes the scale's classification bands, but no official body publishing a Portugal-to-US-GPA table, and the commercial calculators that offer one don't agree with each other on where the bands actually fall.

The official scale and its classification bands

Portugal's higher-education authority, DGES (Direcao-Geral do Ensino Superior), publishes the national 0-20 grading scale along with its qualitative classification bands directly on its own site: 10 to 13 is Suficiente, 14 to 15 is Bom, 16 to 17 is Muito Bom, and 18 to 20 is Excelente, with anything below 10 a fail. A university-level table we checked (Universidade Portucalense's own grading guidance for international students) uses the same band structure. Treat these DGES-sourced bands as the authoritative reference for individual course grades specifically; some secondary, non-government sources describe a different and somewhat higher set of thresholds for an overall final degree classification, which is a separate question covered below.

A real discrepancy: course grades vs. final degree classification

One genuine point of disagreement across sources, worth flagging honestly rather than papering over: the DGES bands above describe individual course grades. At least one secondary source describing Portugal's grading conventions states that an overall final degree classification uses different, higher cutoffs, for instance Excelente starting around 17.5 and a Muito Bom-equivalent classification starting around 15.5, rather than the course-level 16-17 Muito Bom band. We weren't able to fully reconcile this against an official decree specifically covering final-degree classification thresholds in the sources checked for this guide. If you're reporting a final degree classification rather than an individual course grade, confirm with your own Portuguese institution's academic office which specific threshold table applies to your degree, rather than assuming the course-level DGES bands carry over unchanged.

Why grades above 17 are genuinely rare

The practical effect of a 0-20 scale with a 10 floor is that it compresses differently than a US letter-grade distribution. A score in the mid-to-high teens, 15 to 17, Bom to Muito Bom, represents strong, often highly competitive academic performance in the Portuguese system, even though a straight-line reading (treating 20 as the only "perfect" equivalent to a US 4.0 and scaling everything else down proportionally from there) would make a 16 or 17 look like a middling B-range result to someone unfamiliar with the scale. A naive percentage-style conversion that doesn't account for how compressed real scores are at the top of the range risks materially understating a genuinely strong Portuguese transcript.

Média final: a credit-weighted average, not a flat one

Portuguese institutions commonly calculate the overall final average, the média final, as a credit- weighted figure: the sum of each course grade multiplied by its ECTS credit value, divided by the total ECTS credits, consistent with how most ECTS-based European systems compute an overall average. This matters if you're trying to estimate your own average from a transcript rather than relying on an official university-issued figure: a plain arithmetic average of your raw course grades, ignoring credit weight, can diverge noticeably from the actual média final your institution would report, particularly if your highest or lowest grades happened to be in lower-credit courses.

Why the commercial conversion tables don't agree

Search for a Portugal-to-US-GPA calculator and several will come up, and they genuinely disagree with each other, not just in minor rounding but in where entire bands start and end. One converter we checked maps an 18-20 (Muito Bom, by its own labeling, though this conflicts with the DGES Excelente band for that same range) to a flat 4.0 and a 14-15 (Bom) to roughly 3.0. A separate secondary-school-focused converter instead puts a 15-17 range at roughly 3.0-3.3. A third source estimates a 15 specifically at somewhere between 3.2 and 3.4. None of these three agree closely enough to treat any one of them as the "real" number, and at least one source we checked also internally mislabeled its own band names in a way that made its own table self-contradictory. Use any single calculator's output as a rough planning estimate only, not as the figure that will appear on a formal evaluation.

Why this matters for funded doctoral study in Portugal specifically

If you're researching Portuguese grading as part of evaluating a funded PhD in Portugal rather than just preparing a transcript for an application elsewhere, it's worth knowing what Portugal's own doctoral funding actually pays, since that's a separate figure from anything on the 0-20 grading scale. Portugal's national science funding agency, FCT (Fundacao para a Ciencia e a Tecnologia), runs the country's main doctoral studentship programme. One source citing FCT's own Research Grant Regulations table gives a monthly doctoral maintenance grant of EUR 1,359.64 for a grant held inside Portugal and EUR 2,168.65 for one held abroad, both effective from 1 January 2026, figures that line up with a separate funding announcement describing the grant's most recent competitive call as offering 1,600 total awards, split between 1,000 on a standard academic line and 600 on a non-academic line aimed at research outside traditional university settings. We weren't able to independently cross-check that monthly figure against FCT's own published table directly in the research for this guide, so treat it as a planning estimate and confirm the current rate on fct.pt before relying on it, but it gives a real, specific sense of scale, in the low four figures per month, for anyone comparing a Portuguese FCT studentship against funding offers from other countries.

FCT's own current call documentation states the grant is open to Portuguese citizens, EU citizens, third-country citizens, stateless applicants, and recognized refugees alike, meaning a non-EU international applicant is explicitly eligible to apply, not just citizens of Portugal or the EU. The real eligibility gates that do apply across applicants regardless of nationality: you need to already hold a Master's degree (or be on track to hold one) and either be enrolled or eligible to enroll in a PhD programme, you can't already hold a doctorate, and you can't have previously held an FCT doctoral grant of any duration. Applications run through the myFCT portal, typically opening in March, and you name a specific host institution as part of the application, though formal admission to that institution's doctoral programme is a separate step you still need to secure on its own.

What to actually submit

For formal US graduate admissions specifically, many programs require a course-by-course credential evaluation from a NACES-member service like WES or ECE rather than a self-reported conversion. Our guide to WES vs. ECE vs. IQAS covers how those evaluators differ and how to pick the right one. Where a program accepts a self-reported average instead, report your média final on the 0-20 scale directly with the ECTS weighting noted, and let the admissions committee read it in context, rather than presenting an unverified commercial converter's number as if it were an official figure.

The number matters less than the funded fit, for PhD outreach specifically

If you're converting a Portuguese average as part of emailing a specific professor rather than going through a formal admissions committee, a precise GPA conversion usually isn't what decides the outcome, whether that professor actually has active, applicable funding and a genuine reason to want you on the project matters more. Our guide to finding a PhD supervisor in Portugal covers how Portugal's FCT doctoral studentships actually work. GradScoutFunding searches professors by field and country, confirms they're actively publishing, and drafts a personalized first email grounded in their real recent paper for you to review and send yourself, it never sends anything automatically. The free tier gives you 2 credits with no card required, and paid credit packs are one-time purchases that never expire.

Common questions