GPA Calculator
Your GPA is a credit-weighted average of the grade points from each course — not a simple average. This calculator does it the way registrars do: letter grades (or percentages) converted to the 4.0 scale, weighted by credits, with a weighted GPA (Honors +0.5, AP/IB +1.0) shown alongside.
Mix formats freely: type "A−" for one class and "92" for another — both are read correctly.
Weighted GPA adds +0.5 for Honors and +1.0 for AP/IB — many schools use this, some don't. Your transcript's number is what colleges see.
How GPA is calculated
Each letter grade maps to points on the 4.0 scale (A = 4.0, A− = 3.7, B+ = 3.3, and so on). Multiply each course's points by its credits, add everything up, then divide by total credits. A 3-credit A and a 1-credit C average to (4.0×3 + 2.0×1) ÷ 4 = 3.5 — the C drags you down much less than if they were equal weight.
Unweighted vs weighted GPA
Unweighted GPA ignores course difficulty: an A in regular Chemistry and an A in AP Chemistry both count as 4.0. Weighted GPA adds a bonus (commonly +0.5 for Honors, +1.0 for AP/IB), which is why some students have a 4.4 or 5.0-scale GPA. Colleges typically recalculate GPA their own way, so report what your transcript shows.
Frequently Asked Questions
How do I calculate my cumulative GPA?
Add every course from every semester into the calculator with its credits, and the result is your cumulative GPA. For an accurate number, copy courses straight from your transcript rather than from memory.
What is a good GPA?
Context matters. A 3.0 (B average) is solid, 3.5+ is competitive for many four-year colleges, and 3.7+ is typical at more selective schools. For grad school, many programs expect 3.0–3.5+.
Do percentages convert the same way as letters?
Mostly. A 92% is an A− (3.7) on the common ± scale, while a flat 90–100 = A (4.0) scale would give it 4.0. This calculator uses the ± scale; if your school uses the flat scale, enter the letter your school assigned.
How many credits should I enter for a year-long high school course?
It depends on your school's system — commonly 1.0 for a year-long course and 0.5 for a semester course. What matters for GPA is the ratio between courses, so use the credit values on your transcript.