Percentage to 4.0 GPA Calculator
Convert a percentage grade to a US 4.0-scale GPA and letter grade on the plus/minus, A+ (4.0 or 4.3), College Board, 10-point or 7-point scale — with Honors (+0.5) and AP/IB (+1.0) weighting, marks out of any total, a full conversion table and a credit-weighted GPA for several courses.
How it works
Percentage → letter band → grade points. Standard: A 93–100 = 4.0, A− 90 = 3.7, B+ 87 = 3.3, B 83 = 3.0, B− 80 = 2.7, C+ 77 = 2.3, C 73 = 2.0, C− 70 = 1.7, D+ 67 = 1.3, D 63 = 1.0, D− 60 = 0.7, F < 60 = 0 · weighted = points + 0.5 (Honors) or + 1.0 (AP/IB), F stays 0 · several courses: GPA = Σ(points × credits) ÷ Σ credits
US grade point averages run on a 4.0 scale where each letter grade maps to fixed points: A = 4.0, B = 3.0, C = 2.0, and so on, with plus/minus grades filling the thirds in between. Converting a raw percentage means first placing it in a letter band, then reading off the points — a step function, not a smooth line, so 92% and 90% both land on A− while 93% jumps to a full 4.0. Schools move the band edges, so the calculator offers the common variants: an A+ band from 97% (worth 4.0 at most schools, 4.3 at some), the College Board high-school table where D starts at 65%, whole letters in 10-point blocks, and the stricter 7-point scale. Many high schools also report a weighted GPA that adds 0.5 for Honors and 1.0 for AP or IB courses; pick the course level to see both. If your mark is a raw score, set “Score is out of”, and paste several courses with their credits to get the credit-weighted GPA in one go.
Worked example
A course average of 85% falls in the 83–86 band, which is a B, worth exactly 3.0 grade points on the 4.0 scale. In an AP course the same B is weighted to 4.0, and in an Honors course to 3.5. For three courses — “92 4 AP”, “85 3” and “78 3 H” — the unweighted GPA is (3.7 × 4 + 3.0 × 3 + 2.3 × 3) ÷ 10 = 3.07 and the weighted GPA is (4.7 × 4 + 3.0 × 3 + 2.8 × 3) ÷ 10 = 3.62.
Sources: College Board BigFuture — How to convert your GPA to a 4.0 scale
Frequently asked questions
Is the percentage-to-GPA conversion the same everywhere?
No. The bands shown by default are the most common US convention, but schools shift the cutoffs — some make 94 the A line, some ignore plus/minus grades, and College Board’s high-school table starts D at 65. Choose the matching scale, and check your school’s official table.
Why is the conversion a step function?
GPA is defined by letter grade, not by raw percentage, so every percentage inside a band earns the same points. That is why small percentage changes near a band edge can move your GPA while changes in the middle of a band do not. The “Next step up” result shows how far you are from the next band.
How do Honors and AP classes change the GPA?
On a weighted scale many schools add 0.5 grade points for Honors and 1.0 for AP, IB or dual-enrollment courses, so a B (3.0) becomes 3.5 or 4.0. An F stays 0. Colleges often recalculate GPA their own way, so keep both the weighted and unweighted figures.
Is an A+ worth more than 4.0?
At most schools, no — A+ and A both count 4.0. A few colleges award 4.3 for an A+ (usually 97% and above); pick “A+ = 4.3” if yours does.
Can I convert several percentages to one GPA?
Yes. Paste them under “Several courses”, one per line with the credits and AP or H where it applies (for example “88, 3, AP”). Each course is converted on your scale, multiplied by its credits and averaged.
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