How to Calculate Your GPA (Step by Step)

GPA (Grade Point Average) turns your letter grades into a single number on a scale, usually up to 4.0. It's a credit-weighted average, so classes worth more credits count more. Here's how to work it out.

Do it instantly

Enter your courses, grades, and credit hours in the GPA Calculator and it computes your GPA automatically — no manual math.

The standard 4.0 scale

• 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 · F = 0.0

(Scales vary slightly by school — check yours if the points differ.)

The formula

GPA = (sum of grade points × credits) ÷ (total credits). Multiply each course's grade point by its credit hours, add those up, then divide by the total credits.

Worked example

• Math — A (4.0) × 3 credits = 12.0
• History — B (3.0) × 3 credits = 9.0
• Science — B+ (3.3) × 4 credits = 13.2

Total points = 34.2; total credits = 10. GPA = 34.2 ÷ 10 = 3.42.

Weighted vs. unweighted

• Unweighted — every class uses the standard 4.0 scale regardless of difficulty.
• Weighted — honors/AP/IB classes get a bonus (often up to 5.0), rewarding harder courses.

Related tools

Need a specific score on a final? Use the Final Grade Calculator. For plain averages, the Average Calculator and Percentage Calculator help too.

FAQ

What is a good GPA?

Generally, 3.5+ is strong, 3.0–3.5 is solid, and above 3.0 is often the bar for many programs — but it varies by school and goal.

How is GPA different from a percentage?

A percentage is your raw score in one class; GPA converts letter grades to points and averages them across courses, weighted by credits.

Is the GPA calculator free?

Yes — it runs entirely in your browser, free and with no sign-up.