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Convert a US letter grade (A–F) to a percentage grade with a free instant calculator, a full conversion table, worked examples, and what each grade means.
Canonical: https://www.prezumi.com/tools/convert/letter-grade-to-percentage
Applying with a US letter grade (A–F) to a place that uses a percentage grade means reading your grade on a scale it was not earned on. This free converter maps US letter grade (used in the United States) to Percentage instantly, and the table, examples, and notes below explain how the two scales line up so you can put the right number on an application.
| a US letter grade (A–F) | a percentage grade |
|---|---|
| A+ | 99% |
| A- | 91% |
| A- | 90% |
| B+ | 88% |
| B | 85% |
| B- | 81% |
| C+ | 78% |
| C | 75% |
The converter works by anchoring both scales on the US 4.0 GPA, which is the most widely recognised reference point for comparing grades internationally. Your US letter grade is placed on the 0 to 4.0 scale first, then expressed as Percentage.
US letter grades run from A down to F, usually with plus and minus modifiers, and each letter maps to a fixed grade point. An A is 4.0 and roughly 93 to 100 percent, a B is 3.0, a C is 2.0, and an F is a fail below about 60 percent. Letter grades and the 4.0 GPA are two views of the same scale, so converting between them is direct.
A percentage grade is the most common raw marking unit in the world, but the same number means very different things from one country to the next. In the United States 90% is an A, while in the United Kingdom 70% can already be a top First and 85% is almost unheard of. That is why a percentage always has to be read against the national scale it came from before it can be turned into a GPA.
Enter your US letter grade in the calculator above and it maps to percentage instantly through the US 4.0 GPA scale, which acts as the common reference between the two systems. The table below shows the full range. It is a close estimate, so for admissions or immigration use your institution's official scale or a credential evaluator such as WES.
No conversion between grading systems is exact, because scales differ by country and institution. Treat the result as a reliable estimate rather than an official equivalence, and use a recognised credential evaluator when an application formally requires one.
As a rough guide, the very top of the US letter grade scale corresponds to about 99%, and a strong upper result maps to around 90%. The full mapping across every band is in the conversion table above, and the examples show a few common grades in context.
On an international CV it helps to show both: your original US letter grade and the Percentage equivalent in brackets, so a reader in most of the world can understand it at a glance without doing the maths. Prezumi's free résumé builder lets you list your GPA, grade, and honours in a clean, ATS-friendly format.
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