Letter grade, percentage, and 4.0 GPA — converted both ways, plus AP/honors weights
Quick answer: on the standard 4.0 scale, A = 93-96% = 4.0, A- = 90-92% = 3.7, B+ = 87-89% = 3.3, B = 83-86% = 3.0, C = 73-76% = 2.0, F = below 60% = 0.0. Weighted values add +1.0 for AP/IB and +0.5 for honors, so an A in AP is 5.0. Convert any single grade below in either direction; the full 13-row table is under the converter.
Averaging several courses? That's a cumulative GPA — use the GPA calculator or the weighted GPA calculator.
| Letter | Percent range | 4.0 value | Honors (+0.5) | AP / IB (+1.0) |
|---|---|---|---|---|
| A+ | 97-100% | 4.0 | 4.5 | 5.0 |
| A | 93-96% | 4.0 | 4.5 | 5.0 |
| A- | 90-92% | 3.7 | 4.2 | 4.7 |
| B+ | 87-89% | 3.3 | 3.8 | 4.3 |
| B | 83-86% | 3.0 | 3.5 | 4.0 |
| B- | 80-82% | 2.7 | 3.2 | 3.7 |
| C+ | 77-79% | 2.3 | 2.8 | 3.3 |
| C | 73-76% | 2.0 | 2.5 | 3.0 |
| C- | 70-72% | 1.7 | 2.2 | 2.7 |
| D+ | 67-69% | 1.3 | 1.8 | 2.3 |
| D | 63-66% | 1.0 | 1.5 | 2.0 |
| D- | 60-62% | 0.7 | 1.2 | 1.7 |
| F | 0-59% | 0.0 | 0.0 | 0.0 |
A+ is listed at 4.0 because most schools cap it there; some count A+ as 4.3. F carries no weighted bump anywhere. This 13-step scale is the one most transcript evaluators treat as standard, but schools vary — a flat "90 = A" scale with no minuses is the next most common.
| Variant | How it differs | Where you'll see it |
|---|---|---|
| Flat 90/80/70 scale | No pluses or minuses: 90-100 = A = 4.0, 80-89 = B = 3.0 | Many public high schools |
| A+ = 4.3 | Extends the scale above 4.0 for 97%+ | Some private schools, some colleges |
| No D grades | 63-69% falls to F; scale jumps C- (1.7) to F (0.0) | Stricter districts |
| 6.0 scale | Dual-enrollment or college courses add +2.0 | Programs with college credit in HS |
| 0-100 only | No GPA at all; colleges convert from the transcript key | Northeast prep schools |
Colleges handle this by recalculating: most recompute every applicant's GPA on their own unweighted scale using the transcript's grading key. That's why two applicants with identical grades can report different GPAs.
US schools compress a 100-point grade into a 4.0 number using letter bands. The converter above holds the standard 13-band table and works in all three directions: give it a percentage and it returns the letter and point value; give it a letter and it returns the percent band and points; give it a point value and it finds the letter whose bracket contains it.
Pick a direction with the tabs, then type. The course-type dropdown applies the standard weighting — +1.0 for AP or IB, +0.5 for honors — so a 92% (A-, 3.7) in AP converts to 4.7. For a GPA value, brackets sit at the midpoints between letter points: anything from 3.85 up maps to A/A-, 3.5 to 3.84 to A-, 3.15 to 3.49 to B+, and so on.
Five courses, standard scale: 92%, 85%, 78%, 95%, 88%. Band by band: 92 is an A- (3.7), 85 a B (3.0), 78 a C+ (2.3), 95 an A (4.0), 88 a B+ (3.3). Average the points: (3.7 + 3.0 + 2.3 + 4.0 + 3.3) ÷ 5 = 16.3 ÷ 5 = 3.26 unweighted. Now weight it — say the 95 is an AP course and the 88 is honors: (3.7 + 3.0 + 2.3 + 5.0 + 3.8) ÷ 5 = 17.8 ÷ 5 = 3.56 weighted. Same grades, half a point of difference, both numbers on one transcript.
The percent→GPA step is where most errors happen, because band edges are unforgiving: the converter rounds first, so 86.9 becomes 87 — a B+ (3.3) — while 86 on the nose stays a B (3.0). When a transcript lists integer percents, that one point at a boundary is worth 0.3 GPA — which is why teachers who round can genuinely change a class rank.
On the standard 4.0 scale, a B+ is 3.3, earned for 87-89%. Neighbors: B is 3.0 (83-86%) and A- is 3.7 (90-92%). One percentage point decides it: 86 is a B, 87 is a B+, 89 is still a B+, and 90 jumps to A-. Weighted, a B+ in an AP course counts 4.3 and in honors 3.8.
A 4.0 needs A-level work: 93-100% on the standard scale with pluses and minuses (A = 4.0, A+ = 4.3 at schools that cap A+ higher), or 90-100% at schools using the flat 90=A scale. If your school doesn't distinguish A from A+, any grade from 93% up converts to 4.0.
Match the percentage to its letter band, then take that letter's point value: 90-92 is an A- (3.7), 87-89 a B+ (3.3), 83-86 a B (3.0), 80-82 a B- (2.7), and so on down to F (0.0) below 60. For a cumulative GPA, average the point values across courses (weighted: add +1.0 per AP/IB and +0.5 per honors first). The converter above does both directions instantly.
5.0 at most US high schools: an A (4.0) in an AP or IB course adds 1.0. Schools that also weight an A+ at 4.3 can reach 5.3, and a few use 6.0 scales for college-level dual enrollment. Colleges recalculate unweighted GPAs for comparison, which is why a 4.4 weighted and a 3.9 unweighted often appear on the same application.
No. The most common US scale is the 13-step one here (A+ through F with pluses and minuses), but many schools use a flat scale where 90-100 is simply an A = 4.0, some skip D grades, some cap A+ at 4.0, and others don't calculate weighted GPA at all. Check your school's grading key — the table above is the version most transcript-evaluation services treat as standard.
An A-. On the standard scale, A (93-96%) is 4.0 and A- (90-92%) is 3.7. A cumulative 3.7 means your average grade sits right at the A-/A boundary — roughly 92% — which many colleges treat as an A- average.