GPA to Percentage Converter four scales, one grade
Enter a grade on any of four scales and see it on all of them, with the convention behind each conversion named.
Percentage Is the Pivot
Every other scale is derived from it, so the four can never contradict each other.
Conventions, Not Equivalences
No official body has declared a 3.5 GPA equal to a German 1.6. These are the widely used approximations.
How do you convert a GPA to a percentage?
At a Glance
There is no universal formula, because grading systems measure different things. What exists instead is a set of widely used conventions — the ones credential evaluators, admissions offices and school boards actually apply. This converter states which one it uses at every step.
Everything runs through a percentage, which keeps the four scales consistent with each other.
percentage = GPA × 20 + 20, GPA = (percentage − 20) ÷ 20percentage = CGPA × 9.5, German grade = 1 + 3 × (100 − percentage) ÷ 50The 9.5 multiplier is India's Central Board of Secondary Education convention, derived from the average marks of top scorers. The modified Bavarian formula is the standard German method for converting a foreign mark, anchoring 100 % at grade 1 and the pass mark at grade 4. Neither is arbitrary, but neither is a law of nature either.
These are the values the calculator loads by default.
GPA to percentage
3.5 × 20 + 20 = 90 %.
Percentage to letter
90 % falls in the A− band on the standard US letter scale.
Percentage to CGPA
90 ÷ 9.5 = 9.47 on the 10-point scale.
Percentage to German grade
1 + 3 × (100 − 90) ÷ 50 = 1.6, comfortably in the „sehr gut“ range.
Check it in reverse
Enter 2.0 as a German grade and you get 83.33 %, a 3.17 GPA and an 8.77 CGPA — the same chain run backwards.
Use these numbers to orient yourself, never as the figure on an application.
The receiving institution decides. Universities, credential evaluators and employers each apply their own table, and those tables differ. A US admissions office and a German Zeugnisanerkennungsstelle will not necessarily agree on the same transcript.
Grade distributions differ more than the scales do. A 90 % is common in a US course and rare in a German one, so a purely arithmetic mapping systematically flatters or penalises depending on direction. The modified Bavarian formula exists precisely because a naive percentage match was found to be unfair.
The GPA scale is not linear in practice. Most US institutions place A at 93 %, A− at 90 %, B+ at 87 % — bands roughly three or four points wide near the top, not the even 20-point spacing the linear formula implies.
Weighted GPAs above 4.0 fall outside this. An AP-boosted 4.5 has no percentage equivalent here; convert the unweighted figure instead.
To calculate a GPA from individual courses, use the GPA Calculator. For a course mark built from weighted categories, use the Weighted Grade Average Calculator.