Computing your academic performance can feel confusing — especially when your school uses letter grades like A, B+, C-, etc. Fortunately, you can simplify things and get a clear picture of where you stand by using an average letter grades calculator. With this tool, you can combine your individual letter grades, convert them to point values or percentages, and find out your overall average in no time.
Many schools and universities in the U.S. and other countries use a letter grading system, where marks are expressed with letters instead of, or alongside, numbers:
Letter Grade
Percentage Range
Grade Point Equivalent*
A+
~97-100%
~4.3
A
~93-96%
~4.0
A-
~90-92%
~3.7
B+
~87-89%
~3.3
B
~83-86%
~3.0
B-
~80-82%
~2.7
C+
~77-79%
~2.3
C
~73-76%
~2.0
C-
~70-72%
~1.7
D+
~67-69%
~1.3
D
~63-66%
~1.0
D-
~60-62%
~0.7
F
Below 60%
~0.0
*These point values are typical in many U.S. institutions. Your school may use a slightly different mapping.
List all your letter grades. Include everything—assignments, quizzes, tests, projects—anything that contributes to your final grade.
Convert each letter grade to its numerical point equivalent. Use the table above or your school’s specific conversion scale.
Decide whether the grades are weighted or unweighted.
Unweighted: Every grade counts equally.
Weighted: Grades carry different importances (for example, a final exam might count more than a quiz).
Compute the sum of grade points.
If unweighted: just add up all converted points.
If weighted: multiply each grade’s point by its weight, then sum up.
Divide by the total number of grades (or by the total of all weights if weighted). This gives your average in point form, which you can then convert back to a letter grade.
Even though doing these calculations with pen and paper is possible, an average letter grades calculator makes life easier by:
Reducing human error
Handling weighted vs. unweighted grades
Allowing you to test “what if?” scenarios (e.g. “What happens to my average if I get an A- on the next test?”)
Helping you track progress over time without redoing everything
Imagine you have the following grades:
English: B+
Math: C
Science: A-
History: D+
Using the point equivalents above:
Subject
Letter
Points
English
B+
3.3
Math
C
2.0
Science
A-
3.7
History
D+
1.3
Sum of points = 3.3 + 2.0 + 3.7 + 1.3 = 10.3
Divide by the number of grades (4): 10.3 ÷ 4 = 2.575
That corresponds roughly to a C+ in the letter-grade equivalent.
If, though, English and Science are worth 40% each, and Math and History 10% each, you would adjust each grade’s contribution accordingly before summing and dividing by total weight (100%).
Check your school’s scale. Some places don’t use “A+” or may have different cutoffs for what counts as B- vs. B, etc.
Remember to include all relevant grades. Sometimes project scores or lab work are left out—but they affect the real average.
Use weights when needed. If a final exam is 30% of your grade, it should count as 30%, not the same as a quiz worth only 5%.
Round wisely. After you calculate your average point, do you round it up or down? See your school’s policy.
Letter grades are a common, practical way to measure academic performance, but they can be much more meaningful when you know your overall average. By converting each of your letter grades into points, applying any necessary weights, and dividing correctly, you’ll know exactly where you stand. And tools like an average letter grades calculator make the process fast, accurate, and stress-free. With this approach you can set realistic goals, chart your improvement, and approach every assessment with confidence.