If you have ever stared at a report card and wondered what a B− actually means in numbers, you are not alone. Letter grades tell a story, but colleges, scholarships, and employers all speak in GPA. The bridge between the two is the letter grade to GPA chart — and once you understand it, reading a transcript gets a whole lot easier.
This guide walks you through the full chart, explains how plus and minus grades shift your numbers, and shows you how a single grade flows into an overall GPA. For instant conversions anytime, try the letter grade to GPA converter first, then come back for the full picture.
Why Letter Grades and GPA Both Exist
Letter grades are the language of the classroom: teachers assign them, students understand them, and parents recognize them at a glance. An A feels like success, a C feels average, and an F needs no explanation. But letters are hard to average. You can’t add an A to a B and divide by two in any meaningful way.
That’s where GPA — grade point average — comes in. Each letter gets a numeric value called grade points: A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0. Those numbers can be weighted by credit hours and averaged across every course on your transcript. The chart that maps letters to numbers is the engine under every GPA calculation you will ever see.
The Standard 4.0 Conversion Chart
The most widely used scale in the United States is the unweighted 4.0 scale. Here is the complete conversion, including plus/minus grades:
| Letter Grade | GPA | Typical Percentage Range |
| A+ | 4.0 | 97–100% |
| A | 4.0 | 93–96% |
| A− | 3.7 | 90–92% |
| B+ | 3.3 | 87–89% |
| B | 3.0 | 83–86% |
| B− | 2.7 | 80–82% |
| C+ | 2.3 | 77–79% |
| C | 2.0 | 73–76% |
| C− | 1.7 | 70–72% |
| D+ | 1.3 | 67–69% |
| D | 1.0 | 63–66% |
| D− | 0.7 | 60–62% |
| F | 0.0 | 0–59% |
This is the same chart built into our letter grade to GPA converter — bookmark it if you do these conversions often.
How the Plus/Minus System Works
Look closely at the chart and a pattern jumps out: each plus adds 0.3 grade points, each minus subtracts 0.3. A B+ (3.3) sits exactly 0.3 above a B (3.0); a B− (2.7) sits 0.3 below. It’s a small difference per course, but it compounds. Four B+ grades across a semester give you a 3.3 — while four plain Bs give you a 3.0. That’s a gap that can matter for honor roll cutoffs and scholarship thresholds.
The other detail worth noticing is that A+ tops out at 4.0 on the standard unweighted scale. You may occasionally see 4.3 or 4.33 attached to an A+ — those come from weighted or alternative scales, usually for honors or AP courses. On the plain 4.0 scale most schools use, the ceiling is 4.0.
From a Single Grade to a Full GPA
Converting one grade is only step one. Here’s how schools turn a whole transcript into a single GPA:
- Convert each letter grade to grade points using the chart above.
- Multiply each course’s grade points by its credit hours. (A 4-credit course counts more than a 2-credit one.)
- Add up all those numbers to get total quality points.
- Divide by total credit hours. The result is the GPA.
A quick example: two courses, a 3-credit B (3.0) and a 4-credit A− (3.7). That’s (3 × 3.0) + (4 × 3.7) = 9 + 14.8 = 23.8 quality points, divided by 7 credits = 3.4 GPA. If you’d rather skip the arithmetic, the final grade calculator does the whole weighted calculation for you.
Common Questions About the Chart
Is an A+ better than an A? On the standard 4.0 scale, no — both are worth 4.0 grade points. The plus is a nice distinction on the transcript, but it doesn’t move the GPA.
What GPA do I need for “good” standing? Roughly: 3.7+ is excellent (dean’s list territory), 3.0 is good and solid, 2.0 is the minimum for good academic standing at most colleges, and anything under 2.0 usually triggers probation. A D− (0.7) or F (0.0) can pull an average down fast.
Why does my school’s chart look slightly different? Because cutoffs aren’t universal. One school may set A at 93–96%, another at 94–100%. Weighted scales (5.0 for AP/honors) and alternative scales (4.33) also exist. For official records, always use your own school’s published grading scale — this chart covers the most common convention.
Can I convert percentage to GPA directly? You can, but the safe route is percentage → letter → GPA, since the percentage ranges are approximate. If your scores are still raw numbers, work them out with our percentage calculator first, then map the letter.
The Chart Is a Tool, Not a Verdict
A conversion chart looks dry, but it quietly runs your academic life: every GPA, every class rank, every scholarship cutoff is built on these numbers. Knowing exactly what each letter is worth removes the mystery — and sometimes the anxiety — from a transcript. An A− at 3.7 isn’t a disaster; it’s a number you can plan around.
So keep the chart handy. Use the letter grade to GPA converter for one-tap lookups, the final grade calculator when you’re combining courses, and the middle school GPA calculator if the student in question hasn’t reached high school yet. Numbers are just a language — and now you speak it.
Try Our Free Calculators
Put this guide into practice with our free tools: Grade To Gpa Calculator, College Gpa Calculator, Final Grade Calculator.