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GPA Calculator

The default schedule — an A, an A-, a B+, and a B across 13 credits — works out to a 3.48 GPA. On the 4.0 scale, GPA is a credit-weighted average: each letter grade converts to grade points (A = 4.0, A- = 3.7, B+ = 3.3, and so on down to F = 0), each course's points are multiplied by its credit hours, and the total is divided by total credits.

GPA
3.48
4.0 scale
Courses
4
Credits
13.0
Quality points
45.3
That's roughly a B+ average
3.48 is well above the 2.0 minimum many schools set for good academic standing.
Inputs
Grades (comma-separated)
Credits per courseBlank = 1 each
Credit hours weight each grade
A course's pull on your GPA scales with its credits: a 4-credit B+ (13.2 quality points) outweighs a 3-credit A (12). The heaviest courses move the average the most.
This is the unweighted 4.0 scale
Grades map A = 4.0 down to F = 0 with no AP or honors bump, per the College Board reference. Any course left without a credit value counts as 1 credit.
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The math

Reviewed 2026
Formula
GPA = Σ(grade points × credits) / Σ credits
points A=4.0, A−=3.7, B+=3.3 … F=0
Standard unweighted 4.0 scale
Missing credits count as 1

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Example: how gpa is calculated

Step-by-step with default inputs

Suppose you put the default values into GPA Calculator:

Grades (comma-separated)
A, A-, B+, B
Credits per course
3, 3, 4, 3

Plug those into the formula GPA = Σ(grade points × credits) / Σ credits and the result is:

GPA
3.48

How to calculate gpa by hand

  1. Convert each letter grade to grade points: A = 4.0, A- = 3.7, B+ = 3.3, B = 3.0.
  2. Multiply each course's grade points by its credit hours: 4.0 × 3 = 12, 3.7 × 3 = 11.1, 3.3 × 4 = 13.2, 3.0 × 3 = 9.
  3. Add the quality points: 12 + 11.1 + 13.2 + 9 = 45.3.
  4. Add the credit hours: 3 + 3 + 4 + 3 = 13.
  5. Divide quality points by credits: 45.3 ÷ 13 = 3.48 GPA.
Letter grade to grade point conversion (unweighted 4.0 scale)
Letter gradeGrade points
A+ / A4.0
A-3.7
B+3.3
B3.0
B-2.7
C+2.3
C2.0
C-1.7
D+1.3
D1.0
D-0.7
F0.0

Source: College Board: how to convert your GPA

How does the gpa calculator work?

The calculator uses the standard unweighted 4.0 conversion published by the College Board: A and A+ count as 4.0, and each step down through the +/− modifiers lowers the value (A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, continuing to F = 0). Each course contributes quality points equal to its grade value times its credit hours, and GPA is total quality points divided by total credit hours — so a grade in a 4-credit course moves the average a third more than the same grade in a 3-credit course. You can also enter numeric grade values directly (like 3.7) and mix them with letters. This is the unweighted scale: honors or AP weighting and institution-specific variants are deliberately not applied.

References: College Board: how to convert your GPA.

Last reviewed July 2, 2026 · Editorial policy

Frequently asked questions

How many grade points is an A- worth?

3.7 on the standard 4.0 scale. The steps run A = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, and so on down to F = 0. This calculator treats an A+ the same as an A, at 4.0.

How do credit hours change my GPA?

They weight each grade by the size of the course. A grade in a 4-credit course counts a third more than the same grade in a 3-credit course — in the default example the 4-credit B+ contributes 13.2 quality points while a 3-credit A contributes 12.

What GPA do straight A's with one B give?

With equal credits, four A's and one B average (4.0 × 4 + 3.0) ÷ 5 = 3.80. The single B pulls a perfect 4.0 down by 0.2 because it is one of five equally weighted grades; with more courses behind you, one B moves the average less.

Why does raising a GPA get harder the more credits you have?

Because GPA is a credit-weighted average, new grades are diluted by everything already on the transcript. With 100 credits banked, a 15-credit semester is only about 13% of the total weight, so even straight A's move the overall average modestly.

What does this calculator assume?

Standard unweighted 4.0 scale See the math card above for the full list.

How accurate is this gpa calculator?

The math is deterministic — the same inputs always produce the same output, and the formula is shown above. Accuracy of the answer for your situation depends on how well your inputs match reality and how well the formula models the question.

Guides

What is a good GPA?What counts as a good GPA on the 4.0 scale — 3.0 is a solid B average, 3.5+ is strong — and why 'good' depends on your goal and the scale used.