Grade scale converter

What it's for

Handy to compare grades expressed in different scales: university (out of 30), school (out of 10) or foreign systems (out of 100).

How it works

The conversion is proportional: the grade is turned into a percentage and then onto the new scale. It doesn't account for specific passing thresholds.

The scales you meet

Different countries count differently, and the differences aren't only in the range. Percentages are used in the United States and, for some assessments, in Britain; France uses out of twenty; Italy uses out of ten at school (pass at 6) and out of thirty at university (pass at 18); Germany runs from 1 to 6 and is reversed: 1 is the best mark and 4 the pass. On that one a direct proportion simply doesn't work, and it's the case where the receiving institution's official table should always be consulted.

Proportion knows nothing about pass marks

Here the mark is expressed as a percentage of the starting scale and then placed on the new one, which is the most honest way to convert without outside data. But it's a linear conversion, and real scales aren't: 18 out of 30 is 60%, and in an American system 60% is often a D, barely above failing, while in Italy it's a regularly passed exam.

For the same reason the American GPA (the average out of 4) can't be derived by proportion: it's built on letter bands, and every university has its own table. The number produced here is fine for getting a sense of things or for an informal comparison; for an application, a call for entries or a recognition, you need the official table of whoever receives it.

Nearby tools

For the average of exams taking credits into account there is Weighted average, and for the mark needed in the next exam What mark do I need.