Letter Grade to GPA Converter
Convert a single letter grade, percentage, or GPA point value into the other two, instantly. This is not a full grade point average calculator — if you need to calculate your overall GPA across multiple courses and credit hours, use the full GPA Calculator instead; this tool is only for converting one grade at a time. Type a percentage, pick a letter grade, or enter a GPA point value below, and the other two fields update automatically. If you're starting from a raw test score rather than a letter grade, run the numbers through the Test Score Calculator first to turn a specific result into a letter grade, then bring that letter grade back here to see exactly how many GPA points it's worth.
Weighting is one common convention, not a universal standard. Some schools add +1.0 for AP/Honors/IB courses, others add +0.5, and some cap the weighted maximum or don't weight every letter grade. Check your own school's policy before treating the weighted number here as official.
A B+ typically falls in the 87–89% range and is worth 3.3 grade points on the standard 4.0 scale.
Full Reference Table — Standard +/- Scale
| Letter Grade | Percentage Range | Unweighted GPA | Weighted GPA (+1.0) |
|---|---|---|---|
| A+ | 97–100 | 4.0 | 5.0 |
| A | 93–96 | 4.0 | 5.0 |
| A− | 90–92 | 3.7 | 4.7 |
| B+ | 87–89 | 3.3 | 4.3 |
| B | 83–86 | 3.0 | 4.0 |
| B− | 80–82 | 2.7 | 3.7 |
| C+ | 77–79 | 2.3 | 3.3 |
| C | 73–76 | 2.0 | 3.0 |
| C− | 70–72 | 1.7 | 2.7 |
| D+ | 67–69 | 1.3 | 2.3 |
| D | 63–66 | 1.0 | 2.0 |
| D− | 60–62 | 0.7 | 1.7 |
| F | 0–59 | 0.0 | 1.0 |
This table uses the straightforward “add 1.0 to every tier” weighting convention. Many schools do not extend the weighted bonus to a failing grade, and some cap the weighted GPA of an already-maxed A+ at a fixed ceiling rather than letting it climb to 5.0 — always confirm the exact rule with your school if the number needs to be official.
How Letter Grades Map to GPA Points
The 4.0 scale is the most common way U.S. schools translate a letter grade into a single number that can be averaged across courses. An A is worth 4.0 grade points, a B is worth 3.0, a C is worth 2.0, a D is worth 1.0, and an F is worth 0.0 — each full letter is exactly one point apart. That evenly-spaced structure is what makes averaging grades across very different courses possible in the first place: a 3-credit A and a 4-credit B can be blended into one meaningful number precisely because "A" and "B" always mean 4.0 and 3.0, no matter which class they came from.
Plus/minus scales subdivide each of those full-letter bands into three narrower tiers — a plus, the base letter, and a minus — so that being near the top or bottom of a grade band actually shows up in the number. On the scale used by this converter (and matched to the one used on this site's GPA Calculator), a plus adds 0.3 to the base letter's points and a minus subtracts 0.3, so B+ is 3.3, B is 3.0, and B− is 2.7. The one exception is A+, which most schools still cap at 4.0 — the same value as a plain A — rather than pushing it above 4.0, though not every school agrees on that point (more on this in the FAQ below).
What Does "Weighted" Mean?
A "weighted" GPA adds bonus points to recognize that some courses are simply harder than others. The most common example is a high school that adds extra credit for Advanced Placement (AP), Honors, or International Baccalaureate (IB) courses, on the logic that an A in an AP class represents more work than an A in a regular-track class, and the GPA math should reflect that. This converter defaults to the most widely used version of that convention: adding a flat +1.0 to the unweighted GPA point value whenever the "Weighted" checkbox is turned on.
That said, +1.0 is a convention, not a law. Plenty of schools use a smaller bonus (commonly +0.5), some only weight certain course levels and not others, some cap the maximum weighted GPA a student can earn, and some don't weight grades at all, instead reporting only a single unweighted number on transcripts. If a college application, scholarship form, or class rank calculation depends on your exact weighted GPA, treat this checkbox as a quick estimate and confirm the real number with your school's registrar or guidance office.
Standard vs. Plus/Minus Scales
Not every school uses plus/minus grading at all. Many use a simpler five-tier scale — just A, B, C, D, and F, each worth a flat 4.0, 3.0, 2.0, 1.0, or 0.0 — with no in-between tiers to distinguish a low B from a high B. This converter's "Standard, No +/-" option models that simpler scale, and switching between the two scales with the toggle above shows how differently the same percentage can be scored depending on which system applies. A 92%, for instance, is a solid A on the no-plus/minus scale, but only an A− (3.7, not 4.0) on the plus/minus scale.
College transcripts and high school report cards are roughly split between the two approaches, and even schools that use plus/minus grading don't all draw the boundary lines in the same place. If your school's cutoffs land a point or two off from what's shown here, that's a difference in local policy, not an error in the math.
Frequently Asked Questions
Is a GPA point value always exactly the same everywhere?
No. While an A being worth 4.0 and an F being worth 0.0 is nearly universal, the values in between — and even whether plus/minus grades exist at all — vary from school to school and sometimes from class to class within the same school. The values used in this converter match the scale already used on this site's GPA Calculator, which reflects a common convention, but it is a convention, not a fixed international standard. Always check your own school's grading policy if the exact number matters for something official.
What's the difference between weighted and unweighted GPA?
Unweighted GPA scores every course on the same flat 4.0 scale regardless of difficulty — an A is 4.0 whether it came from a standard class or an AP class. Weighted GPA adds bonus points (commonly +1.0, sometimes +0.5) for harder course levels like AP, Honors, or IB, so a student who takes on more challenging courses isn't penalized relative to a student earning the same letter grades in easier ones. Many high school transcripts list both numbers side by side for exactly this reason.
Why isn't there a universal A+ = 4.3 standard?
Because schools genuinely disagree on how to treat the top of the scale. Some cap every A — A+, A, and A− all included — at a maximum of 4.0, on the reasoning that 4.0 should represent the ceiling of the unweighted scale no matter how the letter is written. Others extend the plus/minus pattern all the way to the top and score an A+ as 4.3, exactly 0.3 above a plain A, for internal consistency with how every other plus is handled. Both systems are common; this converter defaults to the more widely used 4.0-cap convention, matching the scale already used elsewhere on this site.
How do I find my school's exact scale?
Check your course syllabus first — instructors are usually required to state their grading scale and cutoffs there. If it isn't listed, your school's registrar, guidance counselor, or academic catalog is the authoritative source, especially for anything involving official GPA calculations, class rank, or transcripts. Don't assume any online calculator, including this one, exactly matches your institution's policy.
Can I convert a percentage directly to GPA without knowing the letter grade first?
Yes. Just type a number into the "Percentage" field above and the Letter Grade and GPA Points fields will update automatically — there's no need to look up the letter grade yourself first. This is often the fastest path if you already know your raw score as a percentage, for example straight off a graded paper or an online gradebook.
Does this tool calculate my overall or cumulative GPA?
No. This converter only translates one grade — a single letter, percentage, or GPA point value — into its equivalents on the same scale. To combine grades across multiple courses and credit hours into a single overall GPA, use the full GPA Calculator instead, or the Semester Grade Tracker if you want to log assignments over the course of a term and watch a running average update as you go.
What if my percentage doesn't land exactly on one of the table's boundaries?
Grading bands are step functions, not a smooth continuous scale — every percentage within a band (for example, 87–89% for a B+) maps to the exact same GPA point value, and the value only changes once you cross into a different band. That means an 87% and an 89% both convert to 3.3 GPA points here, even though the raw percentages themselves are different. This mirrors how real report cards work: two students with different percentage scores in the same letter-grade band typically show identical GPA contributions.
