University GPA is a credit-weighted average on the standard 4.0 scale, computed with the formula GPA = Σ(grade point × credits) ÷ Σ(credits). Each letter grade you earn is converted to a grade point (A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0.0, plus plus/minus increments), multiplied by the credit hours that course is worth, summed across every course, then divided by your total credit hours. The weighting matters: a 4-credit lecture course pulls your GPA four times harder than a 1-credit seminar, which is exactly how your registrar prints the number on your transcript. The full formula, the letter-to-point table, and a worked example appear below, and the GPA Calculator does the arithmetic for you the moment you finish typing each row. Knowing the formula also lets you predict how a single upcoming course will move your cumulative number, plan a course load that protects a GPA target, and verify the figure your school reports after grades post.
What "Weighted" Means in University GPA
University GPA is always a credit-weighted average, never a plain mean of letter grades. Every course you take carries a credit-hour value — usually 1 to 5 credits, depending on contact hours and any attached lab time — and that value decides how much each grade moves the final number. A 4-credit organic chemistry lecture with an A lifts your GPA far more than a 1-credit music seminar with an A, because the larger course contributes four times the grade points to the running total before the division step.
This credit weighting is universal at US universities and is the same system used on your official transcript. Some high schools add a second layer of "weighted" points for honors or AP classes — an A in AP Biology might count as 5.0 instead of 4.0, which can push the cumulative number above 4.0. Universities generally do not use that scheme: your registrar's GPA is credit-weighted but capped on the unweighted 4.0 scale, which is exactly what a standard college GPA calculator reports.
The two ideas get confused because the word "weighted" does double duty. First, credit weighting, where every grade is multiplied by its credit hours (this is what all universities do). Second, honors or AP weighting, where harder classes earn bonus points (this is mostly a high-school convention). When you see "weighted GPA" on a college transcript, it almost always means credit-weighted only, with no AP bonus added.
The 4.0 Scale: Letter Grade to Grade Point
Each letter grade maps to a fixed grade point on the 4.0 scale. Most US universities use the conversion below; if your school uses a slightly different variant (some cap an A+ at 4.0 while a minority allow 4.3), match the policy listed in your student handbook so the numbers line up with your transcript.
| Letter Grade | Grade Points |
|---|---|
| A+ | 4.0 |
| A | 4.0 |
| A- | 3.7 |
| B+ | 3.3 |
| B | 3.0 |
| B- | 2.7 |
| C+ | 2.3 |
| C | 2.0 |
| C- | 1.7 |
| D+ | 1.3 |
| D | 1.0 |
| D- | 0.7 |
| F | 0.0 |
The top grade is set to 4.0 because most colleges cap it there; a minority of schools award 4.3 for an A+, which can produce a GPA slightly above 4.0. Because the A and A+ share the same 4.0 value at most schools, an A+ does not raise your GPA above an A on the standard scale — it simply acknowledges outstanding work on the transcript. If your institution uses the 4.3 convention, enter 4.3 in place of the dropdown's 4.0 for any A+ row, or check the school's policy before comparing figures.
Calculate Your University GPA
Follow these steps to get your weighted GPA on the 4.0 scale:
- Open the GPA Calculator in your browser. The first row is already visible and the result panel sits below the table.
- For each course, pick its letter grade from the dropdown — A, A-, B+, B, B-, C+, C, C-, D+, D, D-, or F.
- Enter the credit hours that course is worth. Most university courses carry 3 or 4 credits; lab sections, recitations, and seminars often carry 1 credit.
- Click the Add course button to create a new row for each additional class. Repeat until every course in your term has its own row.
- Watch the weighted GPA below the table — it updates instantly as you type, along with your total credit hours. No submit button is needed.
- To remove a course you added by mistake, use the row's remove control. Empty rows are ignored, so leftover blank rows cannot distort the result.
A row with a missing grade, or one with zero or negative credits, is skipped with a note, so a typo cannot silently inflate or deflate your GPA. The result is your credit-weighted GPA on the unweighted 4.0 scale, displayed to two decimals.
A Worked Example With Mixed Credit Hours
Suppose you finish a semester with two courses: an A in a 3-credit lecture and a B in a 4-credit lecture with a required lab. Here is exactly how the formula unfolds, step by step.
- Convert letters to grade points: A = 4.0 and B = 3.0.
- Multiply each grade point by the course's credit hours: 4.0 × 3 = 12.0 and 3.0 × 4 = 12.0.
- Sum the products: 12.0 + 12.0 = 24.0 grade points earned.
- Sum the credit hours: 3 + 4 = 7 credits attempted.
- Divide total grade points by total credits: 24.0 ÷ 7 = 3.4286, rounded to 3.43.
Your semester GPA on the 4.0 scale is 3.43. Note what happened: even though you earned two grades, the heavier 4-credit course pulled as much weight as the lighter 3-credit course, and the credit-weighted average (3.43) sits between the two letter-grade values rather than landing on a midpoint. If you had taken two 3-credit courses instead, the GPA would be (4.0×3 + 3.0×3) ÷ 6 = 21 ÷ 6 = 3.50. Same grades, different credit mix, different result — that is the credit-weighting effect in plain numbers.
The GPA Calculator performs this multiplication, addition, and division for every row you fill in, so once you understand the steps above you can skip the longhand for any real semester and let the tool handle the running total.
Semester GPA vs Cumulative GPA
Universities track two distinct GPAs on every transcript, and the calculation works the same way for each — only the list of courses changes.
A semester GPA covers one term only: every course you took that fall or that spring, weighted by each course's credit hours. It answers "how did I do this term?"
A cumulative GPA covers every course you have attempted at the institution so far, including failed and repeated classes, again weighted by credit hours. It answers "how am I doing overall?"
To produce a cumulative figure in the calculator, list every course from every term, with its letter grade and the credits it was worth. To produce a single-term figure, restrict the list to one term. Because the formula is identical — grade points earned divided by credits attempted — both calculations come out of the same tool with the same confidence.
Be aware that most universities exclude transfer credits, audited courses, pass/fail grades, and withdrawals from the GPA denominator, even when those entries appear on the transcript. Reproduce that exclusion in your course list to mirror what your registrar reports. If you retook a course and only the higher grade counts under your school's grade-replacement policy, enter only that higher grade in the relevant row.
Using Your GPA to Plan Next Semester
A GPA number is useful beyond a single report. Three practical ways to use the calculator while you are still enrolled:
Project a future term. Suppose you are at 3.30 cumulative across 60 credits and want to know what GPA next semester needs to hit a 3.50 cumulative. Enter your past 60 credits with their grades to set the baseline, then add the courses you plan to take next term with the grades you hope to earn. Adjust the projected grades until the cumulative result lands on your target — the calculator updates the running total each time you change a row.
Compare scheduling tradeoffs. A 4-credit STEM lecture with an A and a 1-credit elective with a B do not move your GPA equally. Plug both into the calculator and see the credit-weighted effect directly, which helps when choosing between a heavy technical sequence and a lighter elective in the same semester. If a particular course is graded pass/fail at your school, leaving it out of the list keeps it from distorting the projection.
Sanity-check the registrar. After finals post, the registrar publishes a GPA that should match what the calculator shows for the same input list. If the numbers differ, the usual culprits are missing credit values, a withdrawn course that should be excluded, or a plus/minus increment the registrar counts differently from your school's published scale. Recompute with the same inputs the registrar uses, and the figures should agree to two decimals.
For a single class grade from assignment scores, a grade calculator takes you from percentages to a letter grade. For a plain unweighted mean of numbers — useful when a quick average is all you need — an average calculator handles it without the credit weighting step.