The OMSAS percentage scale
| Percent mark | OMSAS GPA |
|---|---|
| 90–100% | 4.0 |
| 85–89% | 3.9 |
| 80–84% | 3.7 |
| 77–79% | 3.3 |
| 73–76% | 3.0 |
| 70–72% | 2.7 |
| 67–69% | 2.3 |
| 63–66% | 2.0 |
| 60–62% | 1.7 |
| 57–59% | 1.3 |
| 53–56% | 1.0 |
| 50–52% | 0.7 |
| 0–49% | 0.0 |
OMSAS — the Ontario medical school application service — normalizes every applicant onto 0.0–4.0 using per-university conversion scales; the table above is the Ontario percentage scale (Scale 3) used for percentage transcripts from Western, Guelph and others, and it's the default here. Two things trip applicants up: the 3.9 step at 85–89% (no standard US scale has one), and the fact that the applies-to list is per university — McMaster, for instance, is a letter-scale (Scale 7) school, and RMC and Memorial have their own percentage tables with different bands. OMSAS updates the tables each application cycle.
Three letter scales, one transcript
| Letter | OMSAS | SFU (4.33) | Alberta (4.0) |
|---|---|---|---|
| A+ | 4.00 | 4.33 | 4.00 |
| A | 3.90 | 4.00 | 4.00 |
| A- | 3.70 | 3.67 | 3.70 |
| B+ | 3.30 | 3.33 | 3.30 |
| B | 3.00 | 3.00 | 3.00 |
| B- | 2.70 | 2.67 | 2.70 |
| C+ | 2.30 | 2.33 | 2.30 |
| C | 2.00 | 2.00 | 2.00 |
| C- | 1.70 | 1.67 | 1.70 |
| D+ | 1.30 | — | 1.30 |
| D | 1.00 | 1.00 | 1.00 |
| D- | 0.70 | — | — |
| F | 0.00 | 0.00 | 0.00 |
Canada has no single GPA system. SFU's official calendar runs a 4.33 scale where A+ outranks A; Alberta's official 4.0 scale caps both at 4.0; OMSAS's letter conversion splits the difference with its 3.9 for an A. A straight-A+ transcript is a 4.33, a 4.0 or a 4.0 depending on who's counting — which is why the letter mode above reports all three side by side. One myth worth killing: UBC has no official 4.33 table. UBC records percentages with published letter bands, and the "UBC 4.33" charts circulating on calculator sites are third-party inventions — quote your percentage instead.
Why there's no R-score calculator here
Quebec's CEGEP cote R blends your z-score within each class group with indicators of the group's strength and spread — inputs derived from your classmates' records, which you don't have. A calculator fed only your own grades cannot compute it honestly, so we don't pretend. For everything outside Quebec, this page plus thecumulative GPA calculator (for multi-term US-scale records) and the standard GPA calculator cover the conversions that can be done from a transcript. Your Canadian courses stay in their own saved slot here — deliberately separate from the US-scale terms those tools track, because the scales don't mix.
Frequently asked questions
How is the OMSAS GPA calculated?
OMSAS converts every undergraduate course to a 0.0–4.0 value using the conversion scale assigned to the school that issued the transcript, then credit-weights the results. On the Ontario percentage scale, 90–100% converts to 4.0, 85–89% to 3.9, 80–84% to 3.7, and so on — note the unusual 3.9 step, which doesn't exist on standard US scales.
What is a 4.33 GPA scale?
A scale where A+ carries more than A: at SFU, officially, A+ = 4.33, A = 4.00, A− = 3.67, descending by thirds. Compare Alberta's 4.0 scale, where A+ and A are both 4.0. The same transcript full of A+ grades reads differently on the two systems, which is why cross-scale comparisons need the actual tables, not a rule of thumb.
Does UBC use a 4.33 scale?
UBC records official grades as percentages, with published letter bands (A+ = 90–100%, A = 85–89%) but no official percentage-to-4.33 table — the 'UBC 4.33 GPA' charts on many calculator sites are third-party inventions. For medical school applications, OMSAS applies its own conversion to UBC transcripts; for everything else, quote the percentage.
Why isn't the Quebec R score supported?
Because it can't be honestly computed from your own marks. The cote R combines your z-score within each class group with group-strength and dispersion indicators derived from classmates' data — numbers students don't have. Any 'R score calculator' that takes only your grades is guessing; ours declines to.