Convert to GPA Calculator
Use this tool to convert letter grades, percentages, or raw 4.0 points into a weighted GPA.
Enter grades as letters (for example: A-, B+, C).
| Course | Letter Grade | Credits | Remove |
|---|
How this convert to GPA calculator works
A GPA (Grade Point Average) is usually calculated by converting each class grade into grade points, multiplying by the class credit hours, and then dividing by the total credits. This calculator follows that same weighted method, which is what most high schools and colleges use.
In plain terms: a 4-credit class affects your GPA more than a 1-credit class. That is why it is important to include credit values for every course instead of just averaging grades directly.
Formula used
Weighted GPA = Σ(grade points × course credits) ÷ Σ(total course credits)
Step-by-step: how to use the tool
- Select your grade input type (Letter, Percentage, or GPA points).
- Enter a course name (optional, but helpful for organization).
- Enter the grade for each course row.
- Enter the number of credits for each class.
- Click Calculate GPA to see your weighted result and conversions.
Grade conversion assumptions
Because schools use different scales, conversion can vary. This page uses a common U.S.-style 4.0 scale with plus/minus breakdowns:
- A+/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
Percentage conversion in this calculator maps common grade bands (for example, 90–92 = 3.7, 83–86 = 3.0, and so on). If your institution uses a custom rubric, treat this as an estimate and verify with your official handbook.
Weighted vs. unweighted GPA
Unweighted GPA
Unweighted GPA uses the same 0.0–4.0 scale for every class, no matter difficulty level. An A in any class is 4.0.
Weighted GPA
Weighted GPA may add difficulty multipliers for AP, IB, Honors, or dual-enrollment classes. Some schools use a 5.0 scale for weighted reporting. This calculator reports your base 4.0 weighted-by-credits GPA and also provides a simple 5.0 equivalent for quick comparison.
Common mistakes when converting to GPA
- Ignoring credits: not all classes carry equal weight.
- Mixing scales: combining percentage and letter inputs without converting consistently.
- Using the wrong institutional policy: many schools have unique grade bands.
- Rounding too early: round only at the final GPA result.
- Forgetting repeated-course rules: some schools replace old grades, others average both.
Why GPA conversion matters
Accurate GPA conversion is useful for transfer applications, scholarship eligibility checks, internship requirements, and self-tracking semester performance. A small difference in conversion method can affect your eligibility category, so always confirm official numbers with your registrar when stakes are high.
Quick FAQ
Is this calculator official?
No. It is a practical estimation tool. Official GPA always comes from your school.
Can I convert international grades?
You can enter percentage or mapped values, but international systems vary widely. For WES, ECTS, UK classifications, or country-specific scales, use your institution’s approved conversion guidance.
Does this include AP/Honors weighting?
Not automatically. This tool calculates a standard weighted-by-credit GPA on a 4.0 basis. If your school adds honors points, apply that policy before or after calculation according to your handbook.
Final note
A GPA is a useful metric, but it is not your whole academic story. Course rigor, project work, recommendation quality, and growth over time all matter. Use GPA tools to stay informed, then focus on consistent progress and strong learning habits.