Your GPA is the single number colleges, employers, and grad schools use as a quick academic snapshot. This free GPA calculator lets you enter any number of courses with letter grades and credit hours, then instantly computes your semester GPA and — if you provide your prior record — your updated cumulative GPA on the standard 4.0 scale. No spreadsheet needed.
How the GPA Calculator Works
GPA is a credit-weighted average: each course contributes proportionally to its credit-hour value. The formula is GPA = Σ(Grade Points × Credits) ÷ Σ(Credits). Enter each course's letter grade (A through F, with plus/minus) and credit hours. The calculator multiplies grade points by credits to get quality points, sums everything, and divides by total credits. To get your cumulative GPA, enter your previous GPA and total credits in the optional section — the tool will combine both semesters into one weighted average.
3 Real-World Examples
5 courses: English B+ (3cr), Math A- (4cr), History B (3cr), Lab A (1cr), CS A- (3cr). Grade points: 3.3×3 + 3.7×4 + 3.0×3 + 4.0×1 + 3.7×3 = 9.9+14.8+9.0+4.0+11.1 = 48.8 ÷ 14 credits = 3.49 GPA.
Freshman year GPA 3.2 (30 credits), Sophomore year 3.6 (30 credits). Cumulative: (3.2×30 + 3.6×30) ÷ 60 = (96 + 108) ÷ 60 = 204 ÷ 60 = 3.40 cumulative GPA.
Current cumulative GPA 3.2 after 45 credits. Target: 3.5 by end of semester (15 more credits). Required semester GPA: (3.5×60 − 3.2×45) ÷ 15 = (210 − 144) ÷ 15 = 66 ÷ 15 = 4.4 — not achievable with standard grades; target 3.5 is out of reach this semester.
Tips
- High-credit courses move your GPA more than low-credit ones — prioritize your effort in 4-credit core courses.
- Use the cumulative section to simulate scenarios: what GPA do you need this semester to reach a 3.5 overall?
- A W (withdrawal) typically does not affect GPA but may affect financial aid — check your school's policy.
- Plus/minus grades matter more than most students realize: the difference between a B (3.0) and a B+ (3.3) over 15 credits is 4.5 quality points.
Understanding the 4.0 GPA Scale
The 4.0 scale is the standard US grading system where A = 4.0, B = 3.0, C = 2.0, D = 1.0, and F = 0.0. Plus and minus grades add fractional points: A- = 3.7, B+ = 3.3, B- = 2.7, and so on. Some institutions use a 4.3 scale where A+ = 4.3, but most college GPA calculations cap A+ at 4.0. Weighted GPA — used in high schools for AP and honors courses — can exceed 4.0, but colleges typically recalculate applicants on an unweighted scale using their own formula.