GPA from letter grades calculator

It handles plus and minus grades, shows the contribution of every course, and reports the totals behind the result. Use it to check a semester calculation, estimate an academic average, or add consistent GPA arithmetic to an application without relying on a spreadsheet formula.

Enter the grades and credit hours that belong in the average

Create one row for every course or graded item that should contribute to the GPA. Select its letter grade and enter the positive number of credit hours attached to it. Credit hours matter because GPA is a weighted average, not a simple average of letter values. An A in a four-credit course therefore contributes twice as many quality points as an A in a two-credit course. The calculator accepts A+, A, A-, every corresponding B, C, and D variant, and F. On this fixed scale, A+ and A both equal 4.0, while minus and plus grades use the common 3.7 and 3.3 style steps. Enter only courses that your institution includes in GPA calculations. Pass/fail courses, withdrawals, incompletes, audits, and transfer work are often excluded, but each school sets its own policy. If a repeated course is replaced rather than combined, include only the attempt that the official policy counts. You may also choose the number of displayed decimal places, from zero through four, without changing the underlying weighted calculation.

Understand the weighted GPA calculation and returned totals

For each row, the calculator looks up the grade-point value and multiplies it by the entered credits. Those products are quality points. For example, a B+ worth 3.3 grade points in a three-credit course produces 9.9 quality points. It then adds quality points across all rows, adds all credit hours, and divides total quality points by total credits. The result is the credit-weighted GPA. The response includes the GPA, total credits, total quality points, number of courses, scale name, and a breakdown that makes every contribution visible. This detail is useful when a result differs from a transcript or another calculator: compare the grade mapping, credits, and included courses row by row. Rounding is applied only to reported values at the requested precision; all entered rows still participate in the calculation before the GPA is reported. Because every credit value must be finite and greater than zero, an empty, zero-credit, or malformed record returns a clear input error instead of quietly distorting the denominator.

Compare the estimate with your institution's official policy

Treat the result as a transparent calculation, not as a replacement for an official transcript or registrar decision. Schools differ in their letter-grade scales. Some award 4.33 for A+, omit D- or plus and minus grades, cap particular programs at 4.0, or use different values for graduate work. Policies also vary for repeated courses, forgiven grades, transfer credits, remedial classes, withdrawals, and pass/fail options. This calculator deliberately uses one documented 4.0 mapping so that identical inputs always produce identical outputs; it does not guess a school from a name or alter the rules dynamically. Before using the GPA for an application, scholarship threshold, academic standing decision, or graduation plan, compare the scale and inclusion rules with the institution's published policy. For automation, send the same grade records through the API for $0.002 per request and retain the returned breakdown with your source data. That creates an auditable calculation: reviewers can see which rows were counted, their grade-point values, their weighted contributions, and the exact totals used in the final division.