Letter Grade to GPA Converter: All Four US Scales with Batch Entry
Click any letter grade for an instant GPA lookup on all four US scales. Switch to Batch Entry to add multiple courses with credit hours and get your cumulative GPA with a full quality points breakdown. Free, no signup required.
| Letter Grade | Percentage | GPA Points |
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Table updates when you change the GPA scale. Click any row to select that grade.
What Is a GPA and Why Do Letter Grades Get Converted?
Grade Point Average is the numerical system US colleges and universities use to represent a student’s academic performance in a single comparable number. Letter grades are the familiar A through F system teachers use on individual assignments and courses, but those letters need a numerical equivalent to be combined across courses with different credit values. That conversion is the GPA scale: A becomes 4.0, B becomes 3.0, C becomes 2.0, D becomes 1.0, and F becomes 0.0 on the most common US system.
The reason GPA matters is that it does something letter grades cannot do alone: it weights grades by course credit hours. An A in a 1-credit physical education class and an A in a 4-credit organic chemistry course both earn the letter A, but they are not equivalent contributions to academic achievement. GPA accounts for this by multiplying the grade point value by the credit hours, producing quality points that reflect both grade and course weight. A student who earns an A in organic chemistry contributes 16.0 quality points to their GPA calculation, while the same A in a 1-credit class contributes 4.0.
The Four GPA Scales Used Across the United States
American schools are not uniform in how they translate letter grades to GPA points. Four distinct scales are in common use. The Standard 4.0 scale assigns whole numbers: A earns 4.0, B earns 3.0, C earns 2.0, D earns 1.0, and F earns 0.0. Plus and minus distinctions have no effect in this system, so a B- and a B+ are both 3.0. This is the simplest scale and was historically the most common before the widespread adoption of plus/minus grading.
The Plus/Minus 4.0 scale is now standard at most US colleges. It assigns finer distinctions: A remains 4.0 but A- drops to 3.7, B+ is 3.3, B is 3.0, and B- is 2.7. The pattern continues down through D-. This scale allows institutions to distinguish between a strong B and a weak B, which matters considerably when two students both list a B as their course grade but one scored 88% and the other scored 81%.
The 4.3 scale is the same as the plus/minus 4.0 scale except that A+ earns 4.3 instead of being capped at 4.0. This allows a small number of exceptional A+ grades to push a GPA slightly above 4.0. Some high schools and a few colleges use this scale. The Weighted 5.0 scale adds difficulty bonuses for advanced coursework: AP, IB, and dual enrollment courses use a scale one full point higher, so an A in an AP course earns 5.0 instead of 4.0. Regular courses use the standard 4.0 scale on top of the weighted system.
Quality Points: The Core of GPA Arithmetic
Quality points are the product of grade points and credit hours. If you earn a B+ (3.3) in a 3-credit course, you earn 9.9 quality points. Your cumulative GPA is the sum of all quality points divided by the sum of all credit hours. The batch entry mode in this converter shows the quality points breakdown for every course you enter, which makes it transparent exactly how each grade contributes to your final number. Students who understand quality points can make strategic decisions about course loads and grade targets rather than treating GPA as a mysterious averaging system.
Using This Converter: Quick Lookup, Batch Entry and GPA Scales
This tool works in two modes that cover the most common use cases for letter grade to GPA conversion.
Quick Lookup is the fastest path to a single grade’s GPA value. Click any letter grade button, from A+ through F, and the GPA value appears instantly for whichever scale is currently selected. Change the scale by clicking one of the four scale buttons: Standard 4.0, Plus/Minus 4.0, 4.3 Scale, or Weighted 5.0. The reference table below the result shows the complete conversion chart for the active scale. Click any row in the reference table to select that grade for the detailed result view. This mode is ideal for quickly checking what a specific grade is worth or comparing values across scales.
Batch Entry mode handles multiple courses at once. Add a row for each course, enter the optional course name, select the letter grade, and enter the credit hours. The GPA column beside each row updates instantly as you make selections. When you are ready, click Calculate GPA to see the full quality points breakdown and your cumulative GPA. The cumulative GPA displayed is the true weighted average accounting for different credit hour values across courses, not a simple average of the individual grade points. This gives you the same number that would appear on your official transcript.
Three Real GPA Conversion Scenarios from US Students
Emma is completing her second semester and wants to calculate her semester GPA before official grades are posted. She has five courses: Introduction to Psychology (B+, 4 credits), Calculus II (A-, 4 credits), English Composition (A, 3 credits), Spanish 202 (B, 3 credits), and Introduction to Chemistry Lab (C+, 1 credit). Her school uses the Plus/Minus 4.0 scale.
Quality points: B+ (3.3 x 4 = 13.2) + A- (3.7 x 4 = 14.8) + A (4.0 x 3 = 12.0) + B (3.0 x 3 = 9.0) + C+ (2.3 x 1 = 2.3) = 51.3 total quality points across 15 credit hours.
Emma’s previous semester GPA was 3.61. Her cumulative GPA, if she had 30 prior credit hours at 3.61, is computed as: (30 x 3.61 + 51.3) / 45 = (108.3 + 51.3) / 45 = 159.6 / 45 = 3.547. The batch mode shows this entire calculation with each course’s quality points visible, so she can see exactly which courses pulled her down and by how much.
Tyler attends a school that uses a weighted 5.0 scale for AP and Honors courses. He is taking AP US History (A-, 1 credit), Honors English (B+, 1 credit), AP Calculus BC (B, 1 credit), Spanish 3 regular (A, 1 credit), and PE regular (A, 0.5 credit). His school’s weighted system: AP A- = 4.7, Honors B+ = 3.8, AP B = 4.0, Regular A = 4.0, Regular A = 4.0.
Using the standard weighted values from this converter: AP A- = 4.7, Honors B+ = 4.3, AP B = 4.0, Regular A = 4.0, Regular A = 4.0. Total: (4.7 + 4.3 + 4.0 + 4.0 + 2.0) / 4.5 = 19.0 / 4.5 = 4.22 weighted GPA.
Tyler uses the Quick Lookup to check specific grades individually and the batch entry for his full course load. When applying to colleges, he reports both his weighted and unweighted GPA. The unweighted version (3.71) is what most colleges recalculate for comparison purposes, while the weighted version (4.22) reflects the difficulty of his course selection.
Keisha’s nursing program requires a minimum 3.0 GPA in all prerequisite science courses to apply to the clinical program. She has completed: Anatomy and Physiology I (B, 4 credits), Anatomy and Physiology II (B+, 4 credits), Microbiology (C+, 4 credits), Chemistry (B-, 3 credits), and Statistics (A-, 3 credits).
Quality points on the Plus/Minus scale: B (3.0 x 4 = 12.0) + B+ (3.3 x 4 = 13.2) + C+ (2.3 x 4 = 9.2) + B- (2.7 x 3 = 8.1) + A- (3.7 x 3 = 11.1) = 53.6 quality points across 18 credit hours.
The batch calculator reveals that Keisha is 0.022 GPA points below the 3.0 cutoff. She has one more semester before applying and uses the batch tool to model what grade she would need in her remaining Pathophysiology course (4 credits) to bring her science GPA to exactly 3.0: she needs to earn enough quality points to make (53.6 + x) / 22 = 3.0, meaning x = 12.4, which requires a B (3.1) or higher. A B earns exactly 12.0 quality points, leaving her at 2.98. She needs at least a B+ (13.2) to clear 3.0 comfortably.
What Every US Student Should Know About GPA Scales
Students frequently assume their school uses the same scale as the calculator they found online. Most US universities use the plus/minus 4.0 scale, but your institution may treat A+ as 4.0 (not 4.3), your school may not give D- grades, or your department may have different policies for graduate-level courses. Check your student handbook or registrar page before calculating your GPA for any official purpose like a scholarship application, honor society eligibility, or graduate school application.
The most impactful strategic insight from understanding quality points is that high-credit-hour courses dominate your GPA calculation. A C in a 4-credit required science course contributes 8.0 quality points: the same as an A in a 2-credit elective contributes 8.0 quality points. Earning a B instead of a C in that 4-credit course adds 4.0 quality points to your total. Use the batch entry mode to model which courses, if improved by one letter grade, would move your GPA the most.
On the plus/minus 4.0 scale, the gap between an A- (3.7) and a B+ (3.3) is 0.4 grade points. In a 3-credit course, that difference is 1.2 quality points. Over a four-year degree with 120 credit hours, consistently earning A- grades instead of B+ grades would produce a cumulative GPA approximately 0.4 points higher: the difference between a 3.3 and a 3.7 overall average. That gap determines Dean’s List eligibility at most schools, and often scholarship renewal thresholds.
At most US institutions, students who retake a course and earn a higher grade have the original F replaced in the GPA calculation. The original F still appears on the transcript but no longer factors into the GPA. This policy, called grade forgiveness or grade replacement, varies significantly by school. Some schools average both attempts. Others only allow grade forgiveness for a limited number of courses. Check your academic affairs or registrar office for the exact policy before retaking a course specifically to improve your GPA.
When you apply to graduate school, law school, or medical school, admissions committees frequently recalculate your GPA using their own criteria. Some programs exclude physical education, music, or other non-academic credits. AMCAS (medical school) requires a specific grade-to-GPA table that differs from most university policies. LSAC (law school) applies standardized conversion from various grading systems. Always verify how your target programs will interpret your grades rather than assuming your reported GPA is the number they will use.
When colleges review high school applications, a weighted GPA above 4.0 from one school is not directly comparable to a 4.0 from another because weighting schemes vary enormously. One school might give a 5.0 cap only for AP courses, while another gives 5.0 for both AP and Honors. Selective colleges typically recalculate applicants to an unweighted 4.0 scale for comparison. This is why your class rank relative to your own school’s scale and the rigor of your specific courses often matter more to selective admissions than the raw weighted GPA number.
Frequently Asked Questions About Letter Grade to GPA Conversion
GPA is Grade Point Average. Each letter grade maps to a numerical point value, most commonly on a 0.0 to 4.0 scale. To calculate your GPA, multiply each course’s grade points by its credit hours to get quality points, sum all quality points across courses, and divide by total credit hours. An A in a 3-credit course earns 12.0 quality points (4.0 x 3). A B in a 4-credit course earns 12.0 quality points (3.0 x 4). Both produce the same quality points despite different grades, because the credit hours compensate. Total quality points divided by total credits gives your GPA.
An A is 4.0 on the standard US GPA scale. On the plus/minus scale, an A and an A+ are both typically 4.0 (though some schools with a 4.3 scale give A+ the value of 4.3). An A- is 3.7. On a weighted 5.0 scale for AP or IB courses, an A earns 5.0. A is typically the range from 90% or 93% to 100%, depending on your school’s percentage cutoffs.
A B+ is 3.3 on the plus/minus 4.0 scale and on the 4.3 scale. On the simple A/B/C/D/F scale without plus/minus distinctions, a B+ is treated the same as a plain B and earns 3.0. On a weighted 5.0 scale for AP or honors courses, a B+ earns 4.3. B+ typically corresponds to 87-89% under the standard US grading convention.
The only difference is the value assigned to A+. On the 4.0 scale, the maximum GPA is 4.0 regardless of whether you earn an A+ or an A. On the 4.3 scale, an A+ earns 4.3 instead of 4.0, allowing students who frequently earn A+ grades to have a cumulative GPA slightly above 4.0. All other grade values are identical between the two scales. Most US colleges cap GPA at 4.0, but some high schools and a few universities use 4.3 to recognize exceptional achievement.
Weighted GPA adds grade points for course difficulty. Under the standard system, regular courses use the 4.0 scale, honors courses use a 4.5 scale, and AP or IB courses use a 5.0 scale. This converter’s Weighted 5.0 mode shows AP/IB-level values: an A in an AP class earns 5.0 instead of 4.0, a B earns 4.0 instead of 3.0, and so on. Unweighted GPA uses the same 4.0 scale for every course regardless of difficulty. Colleges often look at both when evaluating applications.
Switch to Batch Entry mode. Add a row for each course, select the letter grade from the dropdown, and enter the credit hours in the next field. The GPA column beside each row updates live. Click Calculate GPA to see the quality points for every course and your overall cumulative GPA. The formula the batch mode applies is: quality points = GPA x credits for each course, cumulative GPA = total quality points / total credits. This is the same formula used by your registrar.
A 3.5 GPA does not correspond to a single letter grade because GPA is a weighted average across multiple courses, not a single grade equivalent. On the plus/minus scale, B+ is 3.3 and A- is 3.7, so 3.5 sits squarely between them. A student with a 3.5 GPA might have a mix of A- and B+ grades, or some A grades balanced by B grades, or any other combination that averages to 3.5 after weighting by credits. There is no single letter grade equivalent for a 3.5 GPA.
Requirements vary by institution. Most US high schools require a 3.0 GPA for honor roll and 3.5 for high honors. At the college level, Dean’s List typically requires a 3.5 or higher for a semester, though some schools set the threshold at 3.7. Academic honor societies like Phi Beta Kappa have specific GPA requirements, usually 3.5 to 3.8. National Honor Society (NHS) for high school requires a minimum 3.0. Always check your specific school’s requirements since they are not standardized across institutions.
An F earns 0.0 grade points but still counts as credit hours in the denominator of the GPA calculation. This means it reduces the overall average without contributing any quality points. In the batch converter, add a course with an F grade and you can see exactly how much it pulls your GPA down. A single F in a 4-credit course drags the average significantly because the denominator grows by 4 but the numerator does not increase at all. Retaking the course under a grade forgiveness policy can remove the F from the calculation at many schools.
An A- is 3.7 on both the plus/minus 4.0 scale and the 4.3 scale. On a weighted 5.0 scale for AP or IB courses, A- earns 4.7. On the simple A/B/C/D/F scale that ignores plus/minus distinctions, an A- is treated the same as a plain A and earns 4.0. An A- typically corresponds to a percentage score between 90% and 92% under the standard US convention, though some schools place A- at 90-93% and others use different cutoffs.
Most US colleges require a minimum 2.0 cumulative GPA for good academic standing, corresponding to a C average. Falling below 2.0 typically results in academic probation. Many majors require a higher GPA for the degree, commonly 2.5 or 3.0. Graduate programs usually require 3.0 for continuous enrollment. Federal financial aid has its own Satisfactory Academic Progress standard, typically requiring a 2.0 GPA and completion of at least 67% of attempted credit hours. Federal Student Aid publishes the full SAP requirements for aid eligibility.
The impact of any grade on your GPA is directly proportional to its credit hours. A 1-credit course has one-fourth the GPA impact of a 4-credit course. To see this clearly, use the batch mode: add the same letter grade in a 1-credit and a 4-credit course and compare their quality points. A B (3.0) in a 1-credit course adds 3.0 quality points. The same B in a 4-credit course adds 12.0 quality points. This is why focusing study effort on high-credit required courses produces more GPA improvement per hour of work than focusing on low-credit electives.
Yes. The reference table in Quick Lookup mode shows every letter grade alongside its GPA value for the selected scale. Find the GPA value you are looking for and read the corresponding letter grade. Since GPA is a weighted average that can fall between two letter grade values, you may find that your specific GPA sits between two letters. For example, a 3.5 cumulative GPA falls between B+ (3.3) and A- (3.7) on the plus/minus scale, meaning it does not map to a single letter grade but is between those two.
Differences arise from scale variations, rounding policies, and institutional conventions. Some schools cap A+ at 4.0 and others use 4.3. Some schools do not award A+ at all. Pass/Fail, Withdrawal, and Incomplete grades are treated differently across institutions. Graduate schools sometimes use a different grade-to-point mapping than undergraduates at the same university. Your registrar’s published grade conversion table is the authoritative source for your institution’s specific policy and should take precedence over any online calculator.
Most US graduate programs set a minimum 3.0 GPA for admission. Competitive research programs at selective universities often expect 3.5 to 3.7. Medical schools look for 3.7 or higher in science prerequisites. Law school admissions use GPA combined with LSAT score, with competitive programs typically expecting 3.5 or above. Business school programs vary widely, from 2.8 minimum at some programs to 3.5 at elite MBA programs. Always check the specific program you are applying to, as requirements differ significantly by field, school, and program type.
On the plus/minus 4.0 scale, an A is 4.0 and a B+ is 3.3, a difference of 0.7 GPA points per course. In a 3-credit course, that represents 2.1 quality points. Over a full semester of five 3-credit courses (15 credit hours), the difference between all B+ and all A grades in semester GPA is exactly 0.7 points. Over a four-year degree with 120 credit hours of the same pattern, the cumulative GPA difference would be 0.7 points, which is the difference between a 3.3 and a 4.0 average: a significant distinction for graduate school, scholarships, and academic honors.
Related Free GPA and Grade Tools
The Letter Grade to GPA Converter on USCalculators.com is provided as a free educational reference tool. GPA values shown follow the most common US conventions but may differ from your institution’s official grading policy. Some schools use different point values, cap A+ at 4.0 rather than 4.3, omit certain grades from their scale, or apply different policies for graduate versus undergraduate courses. Always consult your institution’s published grading scale and registrar for official GPA calculations.
Weighted GPA values shown in the 5.0 scale mode represent AP and IB course-level equivalents as commonly used in US high schools. Individual school districts and institutions may use different multipliers for Honors, AP, IB, or dual enrollment courses. This tool is not affiliated with or endorsed by the College Board, International Baccalaureate, any university system, or any professional credentialing organization.
Content on this page was written and reviewed by the USCalculators editorial team for accuracy and educational relevance. For questions about official institutional GPA calculations, contact your school’s registrar or academic advisor directly.
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