High School GPA Calculator
Calculate your weighted and unweighted High School GPA with AP (+1.0), IB (+1.0), and Honors (+0.5) course weighting.
Academic standing
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Knowing how to calculate your high school GPA gives you complete control over your academic trajectory for college admissions, scholarship applications, and honors eligibility. The mathematical formula converts your letter grades into numerical quality points and divides them by total credits earned.
Assign Grade Points
Convert each course grade to the standard 4.0 scale: A = 4.0, B = 3.0, C = 2.0, D = 1.0, and F = 0.0.
Add Weighting Bonus
If the course is AP or IB, add +1.0 point (A = 5.0). If Honors, add +0.5 points (A = 4.5). Regular courses receive no bonus.
Compute Quality Points
Multiply the course grade points by the attempted credit value (1.0 for full-year courses, 0.5 for semester classes).
Divide by Total Credits
Sum all quality points and divide by total credits attempted. For instance: 20.0 points ÷ 5 credits = a 4.00 GPA.
High School Percentage to GPA Conversion Chart
If your high school reports grades as percentages (e.g., 95% or 88%) instead of letter grades, use this verified conversion scale to find your exact 4.0 and 5.0 weighted GPA equivalents:
| Letter Grade | Percentage | Standard 4.0 Scale | Honors (+0.5) | AP / IB (+1.0) |
|---|---|---|---|---|
| A+ | 97–100% | 4.00 | 4.50 | 5.00 |
| A | 93–96% | 4.00 | 4.50 | 5.00 |
| A- | 90–92% | 3.70 | 4.20 | 4.70 |
| B+ | 87–89% | 3.30 | 3.80 | 4.30 |
| B | 83–86% | 3.00 | 3.50 | 4.00 |
| B- | 80–82% | 2.70 | 3.20 | 3.70 |
| C+ | 77–79% | 2.30 | 2.80 | 3.30 |
| C | 73–76% | 2.00 | 2.50 | 3.00 |
| C- | 70–72% | 1.70 | 2.20 | 2.70 |
| D+ | 67–69% | 1.30 | 1.80 | 2.30 |
| D | 65–66% | 1.00 | 1.50 | 2.00 |
| F | Below 65% | 0.00 | 0.00 | 0.00 |
High School Grading Standards: 4.0 Scale, Honors & UC Rules
College admissions officers look beyond your raw numerical average. Understanding the difference between unweighted, weighted, and university-specific calculations like the University of California (UC) GPA ensures your transcript accurately reflects your academic rigor:
Unweighted 4.0 Scale
Measures grade consistency on a 0.0 to 4.0 ceiling without course difficulty adjustments. Every course carries equal weight.
Weighted 5.0 Scale
Rewards students taking AP, IB, and Honors classes by adding bonus points (+1.0 or +0.5), allowing GPAs to rise above 4.0.
UC GPA Calculator
Calculates GPA using 10th and 11th grade A-G courses only, capping extra honors grade points at a strict 8-semester limit.
Weighted GPA Calculator
Compare your weighted vs. unweighted GPA side-by-side with interactive honors boost metrics and rigor differentials.
Cumulative GPA Calculator
Combine your past semester credits with current high school term grades to forecast your graduation GPA standing.
Frequently Asked Questions
Everything you need to know about course weighting, scales, and college reporting.