How to Convert Percentage Grades to a 4.0 GPA (With Examples)

To convert percentage grades to a 4.0 GPA, turn each course percentage into a letter grade using your school's grading scale, give each letter its grade points (A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0), then take the credit-weighted average. On the common scale College Board publishes, an 85 is a B and counts as 3.0, a 92 is an A and counts as 4.0.

The quick shortcut, percentage × 0.04, gives a different number (85 × 0.04 = 3.40), and it is not how U.S. schools calculate GPA. The rest of this guide shows both methods side by side so you can see which one fits your situation.

Step 1: Turn each percentage into a letter grade

Most U.S. high schools and colleges grade on a percentage scale, then report letter grades. College Board's BigFuture guide shows one commonly used version:

College Board notes that this is one common system and that some schools use plus and minus grades or different cutoffs. (Its table leaves a score of exactly 65 unassigned, which is a good reminder to check your own school's chart.)

Many schools split each letter into plus and minus grades. A typical plus/minus scale looks like this, although cutoffs vary from school to school:

Your school's handbook or transcript key has the final word on which cutoffs apply. Use that chart if you have it; use the College Board table if you need a general estimate.

Step 2: Multiply grade points by credits

Each course's grade points are weighted by its credits. The University of Notre Dame registrar describes the standard method: grade points × credit hours = quality points for each class, then total quality points ÷ total credit hours attempted = GPA.

GPA = sum of (grade points × credits) ÷ total credits

Worked example: five courses

Here is a fictional student's term:

GPA = 51.0 ÷ 16 = 3.19

Now the same grades on the plus/minus scale above:

GPA = 51.6 ÷ 16 = 3.23

Same percentages, two slightly different GPAs, because the cutoffs differ. That is normal, and it is why you should name the scale you used if you ever share an estimate.

To do this arithmetic quickly, enter the letter grades and credits in the College GPA Calculator or the main GPA Calculator. If you only know raw scores in a course and want the letter first, the Grade Calculator turns category scores into a course percentage and letter.

Why "percentage × 0.04" gives a different answer

The proportional shortcut treats the 4.0 scale as a straight line from 0 to 100:

proportional value = percentage ÷ 100 × 4

For the student above, the credit-weighted average percentage is:

(92×4 + 85×4 + 78×3 + 88×3 + 95×2) ÷ 16 = 1,396 ÷ 16 = 87.25
87.25 × 0.04 = 3.49

That is 0.30 higher than the letter-grade result of 3.19. The gap appears because U.S. scales are not linear: everything from 90 to 100 earns the same 4.0, and anything below about 65 earns 0. A 60 becomes 2.40 under the shortcut but an F (0.0) under almost every U.S. grading scale.

The shortcut is fine for a rough sense of where a number sits between two maximums. It is not what U.S. registrars or admissions offices use, so do not present it as your GPA.

When the school recalculates

Admissions offices sometimes rebuild your GPA under their own rules. The University of California, for example, uses only approved A–G courses from specific grades, counts A = 4, B = 3, C = 2, D = 1, ignores pluses and minuses, and adds capped honors points. So a 92 that your school calls A− (3.7) becomes a 4 in UC's calculation. If an application gives instructions, follow them; otherwise report the GPA on your transcript. See why your GPA may not match your transcript for more on this.

If your percentages come from a school outside the U.S., the conversion question changes. Read the international GPA conversion guide instead.

Common mistakes

• Converting the overall average instead of each course. Convert course by course, then weight by credits. Averaging first hides the fact that a 95 and a 75 do not average to the same GPA as two 85s.
• Assuming 90 is always an A. Some schools start A at 93 or 94.
• Forgetting credits. A 2-credit elective should not count as much as a 4-credit core class. The credit-hour weighting guide explains why.
• Adding honors points by default. Weighting is a separate step with its own rules. See weighted vs. unweighted GPA.
• Rounding too early. Keep two decimals until the final answer.

Frequently asked questions

What is an 85 percent on a 4.0 scale?

On the College Board table, 85 is a B, worth 3.0. On a plus/minus scale it is usually a B (3.0) as well. The proportional shortcut gives 3.40, but that is not how U.S. schools assign grade points.

What is a 90 percent GPA?

Usually an A (4.0) or an A− (3.7), depending on whether your school uses plus/minus grades and where the A starts.

Can I just multiply my percentage by 0.04?

You can as a rough comparison, but expect it to differ from your real GPA, especially at the low end where U.S. scales assign an F.

What percentage is a 3.0 GPA?

A 3.0 corresponds to a B, which is roughly 80–89 on the College Board table or 83–86 on a typical plus/minus scale. There is no single exact percentage.

Which scale should I use if my school doesn't publish one?

Use the College Board table as a general estimate, say so when you share the number, and ask your counselor or registrar for the official chart.