Quick answer
A letter grade converts to grade points on the 4.0 scale used by most US schools: A is 4.0, B is 3.0, C is 2.0, D is 1.0 and F is 0, with plus and minus grades moving the value by 0.3 or 0.4 (B+ is 3.3, B− is 2.7). Pick the grade to see its points.
One grade is a lookup, not an average. B+ is worth 3.3 points whatever the course, and the calculator returns exactly that number for each of the thirteen letters from A+ to F.
Related tools: GPA to Letter Grade Calculator: Nearest letter grade for a GPA on the 4.0 scale. GPA Calculator: Calculate your GPA from letter grades and credit hours. Grade Calculator: Percentage grade from points earned and points possible.
How to use the Letter Grade to GPA Calculator
- Choose letter grade: A+, A, A-, B+, B and B- and 7 more.
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Letter grade | Choose one: A+; A; A-; B+; B; B-; C+; C; … | Starts at A |
Formula and method
Formula
Lookup in the 4.0 scale
Rounded to 2 decimal places for GPA, 2 for percentages.
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.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Letter grade = B+.
| Result | Value |
|---|---|
| Grade points | 3.3 |
Example 2
Inputs: Letter grade = F.
| Result | Value |
|---|---|
| Grade points | 0 |
Example 3
Inputs: Letter grade = A-.
| Result | Value |
|---|---|
| Grade points | 3.7 |
The first line is the headline result (grade points). Rounded to 2 decimal places for GPA, 2 for percentages.
What this calculator does not do
A grade point average combines many grades, each weighted by its credit hours. This page converts a single letter; to average several courses, use the GPA calculator, which multiplies each grade's points by its credits and divides by the total credits.
A+ is scored as 4.0 here, as it is at most schools. A few schools score it 4.3, and honors or AP courses often add a point at the school level. Those weighted scales differ from school to school, so check your own school's table before relying on any converter.
The scale at a glance
A and A+ are 4.0, A− is 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 and F 0.0. The steps are 0.3 or 0.4, which is why a plus or minus changes a GPA less than a full letter does.
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Letter grade: left empty shows "Enter letter grade." beside that field and no result.
Choosing between the Letter Grade to GPA Calculator and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [GPA to Letter Grade Calculator](/education/gpa-to-letter-grade/) | gPA | Letter grade |
| [GPA Calculator](/education/gpa-calculator/) | letter grades and credit hours | Your GPA |
| [Grade Calculator](/education/grade-calculator/) | points earned and points possible | Grade |
| [Grade Curve Calculator](/education/grade-curve/) | scores, score the top student should get and curve | Curved scores |
| [Final Grade Calculator](/education/final-grade-calculator/) | current grade, grade you want and final exam weight | Score needed on the final |
Assumptions and limitations
- A+ is treated as 4.0 (some schools use 4.3)
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for letter grade to confirm this.
Frequently asked questions
What is a B+ worth in GPA?
3.3 grade points on the 4.0 scale.
Is an A+ worth more than an A?
Not here: both count as 4.0. Some schools use 4.3 for A+, so your transcript may differ.
Can I convert a percentage with this?
No. It starts from a letter. Use the GPA to Letter Grade calculator for the reverse direction, or your school's percentage table for percent grades.
What does the Letter Grade to GPA Calculator calculate?
Grade points for a letter grade on the 4.0 scale. It returns Grade points.
What formula does the Letter Grade to GPA Calculator use?
Lookup in the 4.0 scale. 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.
What do I need to enter in the letter Grade to GPA Calculator?
You enter Letter grade.
How is the result rounded or limited?
Rounded to 2 decimal places for GPA, 2 for percentages. A+ is treated as 4.0 (some schools use 4.3).
What is an example of a letter Grade to GPA result?
With letter grade B+, the grade points is 3.3.
Related calculators
- GPA to Letter Grade Calculator — Nearest letter grade for a GPA on the 4.0 scale.
- GPA Calculator — Calculate your GPA from letter grades and credit hours.
- Grade Calculator — Percentage grade from points earned and points possible.
- Grade Curve Calculator — Apply a flat or proportional curve to a set of scores.
- Final Grade Calculator — The score needed on a final exam to reach a target course grade.
- Weighted GPA Calculator — GPA with extra points for honors or advanced courses.
Sources
- Common US 4.0 unweighted grading convention; institutions may differ, so confirm with your school's registrar
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.