What Is a Good GPA? GPA Scale & Converter

A GPA is easy to calculate and surprisingly hard to translate. The converter turns any value into a letter and a percent on the standard 4.0 scale, and it shows its working, because percent equivalents depend on the scale your school uses.

The 4.0 GPA scale chart

Every letter grade has a point value; your GPA is the credit-weighted average of those points. This is the common US plus/minus scale used by the converter:

Many schools skip plus and minus grades and use a 10-point scale (A = 90–100 = 4.0, B = 80–89 = 3.0 …), and some use a 7-point scale (A = 93–100). Several states set a 10-point scale for public high schools by rule. Compare them side by side in the grading scale converter.

How the GPA ↔ percent conversion works

A single class is simple: the percent decides the letter, and the letter decides the points. An 88% is a B+, worth 3.3.

A GPA between two letters needs an estimate. The converter draws a straight line between the neighbouring letters’ starting percents:

percent ≈ lower% + (GPA − lower points) ÷ (upper points − lower points) × (upper% − lower%)

Worked example: 3.5 falls between B+ (3.3, starts at 87%) and A− (3.7, starts at 90%). It is halfway, so 87 + 0.5 × 3 = 88.5%. A 3.2 falls between B (3.0, 83%) and B+ (3.3, 87%): 83 + (0.2 ÷ 0.3) × 4 ≈ 85.7%.

Going the other way, the converter shows two numbers for a percent: the points one class earns (a stepped value — 88% is 3.3), and the GPA equivalent of an average (the straight-line value — 88% ≈ 3.43). Treat both as estimates. If your school publishes its own conversion chart, that chart wins.

What percentage is each GPA from 2.0 to 4.0?

Every GPA from 2.0 to 4.0 converts to an estimated percent with the straight-line formula above, using the starting percent of each letter on the plus/minus scale. The table is computed with exactly the method the converter uses, so the two always agree.

GPA to percentage on the 4.0 scale (estimated; plus/minus scale, letter start points C 73%, B 83%, A− 90%, A 93%):

Read the percents as estimates. Between B+ and A− the line covers only 3 percentage points (87 to 90) for 0.4 GPA points, while between B and B+ it covers 4 points for 0.3 GPA points, so equal GPA steps do not mean equal percent steps. On a 10-point scale every letter starts lower (A at 90, B at 80), so the same GPA maps to a lower percent; compare both versions with the percent to letter grade converter.

Each value has its own page with grade mixes, for example the 3.5 GPA breakdown. To get the GPA itself from your classes, calculate your high school GPA first, then convert it here.

Why GPA and percent averages disagree

Because every class is rounded to a letter before averaging, your GPA can look lower or higher than your percent average suggests:

Grades just under a cut-off (89, 79, 86) cost the most. That is also why a teacher’s rounding policy matters.

What is a good GPA?

There is no honest single number. A GPA is “good” relative to something, and four things change the answer:

• Weighted or unweighted. A weighted 3.8 might be a 3.4 unweighted for a student with several AP classes. Always ask which one a requirement means.
• The grading scale. On a 10-point scale, a 90% is an A (4.0); on the plus/minus scale it is an A− (3.7). The same work produces different GPAs at different schools.
• Rigor and trend. Readers of a transcript see your course list and whether grades went up or down, not only the average.
• The specific goal. Programs, scholarships and colleges each publish their own minimums, and many colleges recalculate GPA their own way. Read the requirement from the source.

What the scale can tell you is where you stand in letter terms. A 3.0 is a B average, a 3.5 is halfway between B+ and A−, and a 3.7 is an A− average. Each value page below spells that out with computed tables: the grade mixes that produce it, its weighted equivalents, and the average you’d need to raise it.

GPA values explained

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 3.0
• 3.1
• 3.2
• 3.3
• 3.33
• 3.4
• 3.5
• 3.6
• 3.67
• 3.7
• 3.75
• 3.8
• 3.85
• 3.9
• 4.0

Weighted GPA, 4.33 and 5.0 scales

• 4.0 unweighted — every class counts the same; an A+ is still 4.0.
• 4.33 — A+ earns 4.33, and plus/minus grades move in thirds (A− 3.67, B+ 3.33).
• 5.0 weighted — honors and advanced classes earn bonus points (commonly +0.5 honors, +1.0 AP/IB/dual enrollment), so an A in an AP class counts 5.0.

The converter works on the unweighted 4.0 scale. To see your own weighted and unweighted GPA side by side, use the high school GPA calculator. To see how one more term moves your GPA, try the cumulative GPA calculator.