GPA Scale — 4.0 & Letter Grade Conversion Chart
Reference tables for the standard US 4.0 GPA scale: basic letter grades, plus/minus variants, and a percentage-to-GPA conversion guide. All values match the scale used by the GPA Calculator.
Standard 4.0 GPA Scale
The table below shows the grade point value assigned to each letter grade on the standard unweighted 4.0 scale. This is the most widely used scale at US high schools and colleges.
| Letter Grade | GPA Points | Description |
|---|---|---|
| A | 4.0 | Excellent |
| B | 3.0 | Above average |
| C | 2.0 | Average |
| D | 1.0 | Below average |
| F | 0.0 | Failing |
Plus/Minus GPA Scale
Many schools use a finer-grained scale with plus and minus variants. The table below lists all 13 letter grades and their corresponding 4.0 GPA values.
| Letter Grade | GPA Points |
|---|---|
| A+ | 4.0 |
| A | 4.0 |
| A- | 3.7 |
| B+ | 3.3 |
| B | 3.0 |
| B- | 2.7 |
| C+ | 2.3 |
| C | 2.0 |
| C- | 1.7 |
| D+ | 1.3 |
| D | 1.0 |
| D- | 0.7 |
| F | 0.0 |
Note: A+ and A both equal 4.0 under the standard scale. Some institutions assign A+ a value of 4.3 — check your school's policy.
Percentage to GPA Conversion
Use this table to convert a percentage score to a letter grade and its GPA equivalent. Bands follow the standard US 10-point scale (A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, F < 60).
| Percentage | Letter Grade | GPA Points |
|---|---|---|
| 97–100% | A+ | 4.0 |
| 93–96% | A | 4.0 |
| 90–92% | A- | 3.7 |
| 87–89% | B+ | 3.3 |
| 83–86% | B | 3.0 |
| 80–82% | B- | 2.7 |
| 77–79% | C+ | 2.3 |
| 73–76% | C | 2.0 |
| 70–72% | C- | 1.7 |
| 67–69% | D+ | 1.3 |
| 63–66% | D | 1.0 |
| 60–62% | D- | 0.7 |
| Below 60% | F | 0.0 |
Related GPA Tools
Frequently Asked Questions
What is the 4.0 GPA scale?
The 4.0 GPA scale is the standard grading system used by most US high schools and colleges. Letter grades are converted to numeric points (A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0.0) and averaged across courses weighted by credit hours. The result is a single number between 0.0 and 4.0 that summarises academic performance.
What is the difference between A and A+ on the 4.0 scale?
On the most common plus/minus scale, both A+ and A map to 4.0 grade points — there is no numerical distinction between them at the top of the scale. Some institutions set A+ at 4.3 or 4.33 as an exception, but that is not standard. Check your school's official grading policy to see which convention applies.
What percentage is an A, B, C, D, or F?
Under the standard US 10-point grading scale: A is 90–100%, B is 80–89%, C is 70–79%, D is 60–69%, and F is below 60%. With plus/minus grading, those bands are divided further (for example, A- is typically 90–92% and A is 93–96%). Exact cutoffs vary by institution.
What is considered a good GPA?
A GPA of 3.0 (B average) is generally considered the minimum for competitive graduate school applications and many scholarships. A GPA of 3.5 or higher (roughly an A- average) is considered strong at most institutions. For highly selective programmes or employers, a 3.7+ is often expected. The right benchmark depends on your specific goals and field.
Does every school use the same GPA scale?
No. Most US schools use the 4.0 scale, but the exact plus/minus values and percentage cutoffs vary. Some schools use a 4.3 scale (awarding A+ = 4.3), others do not award A+ at all. International institutions may use entirely different systems (UK uses class bands, Europe often uses 1–10 or 1–20 scales). Always check your school's official scale.
How is weighted GPA different from the standard 4.0 scale shown here?
The standard 4.0 scale treats all courses equally. A weighted GPA adds bonus points for harder courses — typically +0.5 for Honors and +1.0 for AP or IB — so the maximum possible GPA can exceed 4.0. The tables on this page show the unweighted 4.0 scale. Use the Weighted GPA Calculator to factor in course difficulty.