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GPA Calculator

Calculate semester GPA from course grades, custom grade points, and credit hours.

Course rows

Add each GPA-bearing course, select a letter grade or custom point, and enter credit hours.

Course 1

Course 2

Status: initial

Results

Awaiting calculation

Academic planning guide

Introduction

A GPA calculator helps students estimate semester grade point average from course grades and credit hours. It is useful for academic planning, scholarship checks, advising conversations, and understanding how individual courses affect the term result.

What is GPA?

GPA means grade point average. It summarizes academic performance by converting grades into grade points and averaging them with credit-hour weighting.

GPA formula

GPA is calculated by multiplying each course grade point by its credit hours, adding those quality points, and dividing by the total credit hours.

Grade points and credit hours explained

Course name

An optional label that helps identify each course row.

Letter grade

A selected grade such as A, B+, or C- mapped to a 4.0 scale.

Grade point

The numeric point value used in the GPA formula.

Credit hours

The academic weight assigned to a course.

Formula guide

Semester GPA

GPA = Sum of (Grade Point x Credit Hours) / Sum of Credit Hours

  • Grade point is the numeric value assigned to a letter grade.
  • Credit hours weight each course by academic load.

Multiply every grade point by credits, add the quality points, then divide by total credits.

Total grade points

Total Grade Points = Sum of Grade Point x Credit Hours

  • Each course contributes grade points based on both grade and credit hours.

A higher-credit course affects GPA more than a lower-credit course.

Total credits

Total Credits = Sum of Credit Hours

  • Credit hours are the denominator in the GPA formula.

Courses with zero credits are not valid for GPA calculation.

Cumulative GPA placeholder

Future CGPA = Combined historical and current quality points / combined credits

  • Prior GPA and prior credits are not part of this release.

This calculator focuses on semester GPA; cumulative GPA is a planned extension.

Worked examples

Three-course semester

  1. Course 1: A in 3 credits gives 12.00 quality points.
  2. Course 2: B+ in 4 credits gives 13.20 quality points.
  3. Course 3: C in 2 credits gives 4.00 quality points.
  4. GPA = 29.20 total quality points / 9 credits = 3.24.

Custom grade point

  1. A school may use 3.67 for A- instead of 3.70.
  2. Select custom and enter the exact grade point.
  3. The custom point is multiplied by the course credit hours.

Semester GPA example

  1. Add all current semester courses.
  2. Choose each letter grade or custom point.
  3. Enter credit hours for every course.
  4. Calculate to see semester GPA, total credits, and course breakdown.

Credit-hour weighting

  1. A 4-credit course has more effect than a 1-credit course.
  2. Grade point is multiplied by credit hours.
  3. This is why GPA is a weighted average, not a simple average of grades.

Zero-credit exclusion

  1. Courses with zero credits cannot be used in this calculator.
  2. Enter only GPA-bearing credit hours.
  3. Pass/fail or audit courses may follow separate school rules.

Common GPA mistakes

Averaging letter grades directly

GPA uses numeric grade points and credits, not a simple average of letters.

Ignoring credit hours

A high-credit course has more weight than a low-credit course.

Mixing grading scales

Different schools may use different plus/minus values. Use custom points when your scale differs.

Including non-GPA courses

Pass/fail, audit, or withdrawn courses may not count toward GPA depending on institutional policy.

Confusing GPA and CGPA

Semester GPA covers one term. CGPA combines multiple terms and prior credit history.

FAQs

How do I calculate GPA?
Multiply each course grade point by credit hours, add those quality points, and divide by total credit hours.
What is the default GPA scale?
This calculator uses a common 4.0 scale by default.
Can I use letter grades?
Yes. Choose a letter grade and the calculator maps it to a 4.0-scale point value.
Can I enter custom grade points?
Yes. Select custom for a course and enter a grade point from 0 to 4.
What are credit hours?
Credit hours are the academic weight assigned to a course.
Why do credit hours matter?
They determine how strongly each course affects your GPA.
What is total grade points?
It is the sum of each course grade point multiplied by its credit hours.
What is semester GPA?
Semester GPA is the GPA for courses in one academic term.
What is the difference between GPA and CGPA?
GPA often refers to a term or period; CGPA usually combines all completed terms.
Does this calculator calculate cumulative GPA?
Not yet. Cumulative GPA is planned as a future extension.
What is weighted GPA?
Weighted GPA may assign extra points to advanced courses. This release focuses on a standard 4.0 scale.
What is unweighted GPA?
Unweighted GPA uses the same 4.0-scale grade point values for all courses.
Can credit hours be zero?
No. Credit hours must be greater than 0 to avoid division by zero.
Can grade points be above 4?
No. This calculator accepts grade points from 0 to 4 for the default scale.
Should I use my school's official scale?
Yes. Use custom grade points if your institution's plus/minus values differ.

References

Related calculators

Last updated and version history

Last updated: 2026-07-04

  • 1.0.0 (2026-07-04): Initial production release with dynamic course rows, letter grades, custom points, and semester GPA results.