The GPA scale turns your grades into a number colleges can compare. Pick a letter grade or percentage below to see its value on the standard unweighted 4.0 scale – plus its Honors (+0.5) and AP/IB (+1.0) weighted equivalents. Further down: the complete conversion charts, a 5.0 / 10.0 / 100-point scale converter, a worked GPA calculation, and guides to what every milestone GPA from 4.0 to 2.0 actually unlocks.
Standard US unweighted 4.0 scale. Percent bands vary by school – yours may set A at 94%+ or skip plus/minus grades entirely. Weighted values cap at 5.0, and no boost is applied to an F.
How the GPA Scale Works – Letter Grades, Percentages & Grade Points
Three terms cover everything on this page. Your letter grade is the A, B, C, D or F on your report card. Your percent grade is the 0–100 score your teacher uses to assign that letter. And your GPA is the average of your letters converted to points – A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0.0, with plus grades adding a third of a point (B+ = 3.3) and minus grades subtracting a third (A- = 3.7). The chain always runs the same direction: percent → letter → grade points → GPA.
Two versions of the scale exist side by side. The unweighted 4.0 scale ignores difficulty – a B+ in AP Chemistry equals a B+ in regular Chemistry. The weighted scale adds rigor bonuses on top, which is why weighted GPAs can climb to 5.0. Both charts are below.
Unweighted 4.0 GPA Scale Chart – Letter Grade & Percentage Conversion
| Letter | Typical Percentage* | GPA Points |
|---|---|---|
| A+ | 97–100% | 4.0 (4.3 at some colleges) |
| A | 93–96% | 4.0 |
| A- | 90–92% | 3.7 |
| B+ | 87–89% | 3.3 |
| B | 83–86% | 3.0 |
| B- | 80–82% | 2.7 |
| C+ | 77–79% | 2.3 |
| C | 73–76% | 2.0 |
| C- | 70–72% | 1.7 |
| D+ | 67–69% | 1.3 |
| D | 63–66% (some schools 60–66) | 1.0 |
| F | Below 63% (or below 60) | 0.0 |
*Percent bands are the most common US mapping, not a universal rule – districts and colleges set their own cutoffs, and some skip plus/minus grades with straight 90/80/70/60 lines. Your school’s published chart always wins.
Weighted GPA Scale Chart – Honors (+0.5) & AP/IB (+1.0) Values
Weighted scales reward rigor: the same letter earns more points in a harder class. This chart shows every grade three ways – the boost applies to the base value, so an A in AP Biology counts as 5.0 while an A in regular Biology stays 4.0:
| Letter | Unweighted | Honors (+0.5) | AP / IB (+1.0) |
|---|---|---|---|
| A | 4.0 | 4.5 | 5.0 |
| A- | 3.7 | 4.2 | 4.7 |
| B+ | 3.3 | 3.8 | 4.3 |
| B | 3.0 | 3.5 | 4.0 |
| B- | 2.7 | 3.2 | 3.7 |
| C+ | 2.3 | 2.8 | 3.3 |
| C | 2.0 | 2.5 | 3.0 |
| C- | 1.7 | 2.2 | 2.7 |
| D+ | 1.3 | 1.8 | 2.3 |
| D | 1.0 | 1.5 | 2.0 |
| F | 0.0 | 0.0 | 0.0 |
Note the F row: failing an advanced class earns no bonus – a 0.0 is a 0.0 at every level of rigor. Districts vary on caps (some limit weighted GPAs to 4.5) and on which courses qualify; a few weight only core subjects. See how these boosts play out across a full schedule in the high school GPA calculator.
How to Calculate GPA on the 4.0 Scale – Worked Example
The scale converts individual grades; your GPA weights them by credits and averages. The full chain, start to finish:
| Course | Percent | Letter | Points | Credits | Quality Points |
|---|---|---|---|---|---|
| Biology | 91% | A- | 3.7 | 3 | 11.1 |
| Statistics | 88% | B+ | 3.3 | 4 | 13.2 |
| History | 95% | A | 4.0 | 3 | 12.0 |
| Total | – | – | – | 10 | 36.3 |
GPA = 36.3 ÷ 10 = 3.63. Each grade made the full journey: percent → letter via the cutoffs, letter → points via the chart above, points × credits → quality points, and the credit-weighted average is the GPA. When every class carries equal credit – as in most middle and high schools – the formula collapses into a simple average of the points. Run your own schedule through the college GPA calculator or GPA calculator hub and the whole chain happens as you type.
Convert a 5.0, 10.0 or 100-Point GPA to the 4.0 Scale
On a weighted 5.0 scale, a 10.0 scale (common in India), or a 100-point average? The quick estimate divides your GPA by your scale’s maximum and multiplies by 4:
Formula: (Your GPA ÷ Scale Max) × 4. This linear estimate is for orientation only – universities and credential evaluators (WES, ECE) use band-based methods that can differ, especially for international transcripts. Never report a converted GPA as official without checking the institution’s required method.
Which GPA Scale Do Colleges Actually Use?
Here’s the part most scale charts skip: the number on your transcript is a starting point. Many colleges recalculate every applicant’s GPA on their own scale, and the adjustments follow patterns worth knowing:
- Academic-only GPA: non-core courses – PE, health, many electives – get dropped, leaving math, science, English, social studies and world languages. A transcript padded with easy electives deflates under this recalculation.
- Capped weighting: schools often limit how many Honors/AP courses can earn a bonus, so the tenth AP class raises rigor in the reader’s eyes but not the recalculated number.
- The UC method: the University of California famously rebuilds GPA from 10th and 11th grade A–G courses only, with a capped honors bonus – 9th grade and senior year don’t enter the calculation at all.
- Back to 4.0: whatever scale your school reports – 5.0 weighted, 100-point, 4.3 with A+ – admissions offices typically normalize everything to a 4.0 reference to compare applicants fairly.
What Does Your GPA Mean? Guides for Every Milestone on the Scale
Found your number with the converter? Each guide below covers what that GPA means for admissions and scholarships, its letter and percentage equivalents, and how to protect or improve it. (The national average is about 3.0 – see where you land.)