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GPA Calculator

Add your courses, pick each letter grade and credit hours — your GPA computes on the standard 4.0 scale.

By the SmartKitly team · Last updated: October 4, 2026

Courses

How it works

Click + Add course for each class (three rows are ready to start).
Pick the letter grade (A+ through F, with +/−) and the credit hours.
Hit Calculate GPA — the 4.0 scale mapping is shown below for reference.

Worked example

Three courses: A (3 credits) + B+ (4 credits) + C (3 credits) → (4.0×3 + 3.3×4 + 2.0×3) ÷ 10 = 31.2 ÷ 10 = 3.12 GPA.

The math behind it

GPA = Σ(grade points × credits) ÷ Σcredits. Standard 4.0 scale: 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. Credits weight the average — a 4-credit B+ moves the needle more than a 1-credit A.

Common mistakes

Averaging letter grades without weighting by credit hours.
Forgetting that +/− modifiers change the point value.
Mixing the 4.0 (unweighted) scale with 5.0 (weighted/AP) scales.
Rounding too early — keep the decimals until the final result.

Frequently asked questions

What is a good GPA?

3.0+ is solid for most purposes; 3.5+ is competitive for grad school and scholarships. Context (major, school) matters too.

Weighted vs unweighted GPA — what's the difference?

Unweighted caps at 4.0. Weighted gives AP/honors courses extra points (often up to 5.0), rewarding harder schedules.

Do all schools use plus/minus grades?

No — some use straight letters only. If yours doesn't, map A=4.0, B=3.0, C=2.0, D=1.0, F=0.

Does one F ruin my GPA?

It hurts (0 points for those credits), but it's recoverable — strong grades in more credits dilute it over time.

How do I raise my GPA fastest?

Ace high-credit courses. More credits at high grades pull the average up quicker than small wins.