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ALTREPO/Calculators/GRADE CALCULATOR: WEIGHTED & FINAL EXAMS

Grade Calculator: Weighted & Final Exams

Work out your weighted course grade, the score you need on a final exam, and a test score from the number wrong. Enter letters or percentages. Everything runs locally in your browser.

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Course Grade Concept A premium graphic showing weighted assignments aggregating into a final grade. HW 92% TEST 96% FINAL 98% GRADE A A
Your final grade depends on the weight of each category. Use the calculator
to find what score you need on your final exam to reach your goal.

How to calculate your grade

  1. Pick how you enter scores: percentages, letter grades, or points earned out of points possible.
  2. Add a row for each assignment or category, enter its score, and set how much it is worth (its weight).
  3. Your weighted grade updates instantly: each score is multiplied by its weight, the results are added up, and the total is divided by the sum of the weights.
  4. Use the Final and what if tab to see the score you need on a final, and the Test score tab to turn questions wrong into a grade.

Example: homework 84 at weight 20, a project 90 at weight 30, and tests 88 at weight 50 give (84×20 + 90×30 + 88×50) ÷ (20+30+50) = 87.8 percent, about a B+. The calculator above does this for every row as you type.

Grade Calculator FAQ

How do I calculate my grade with weighted categories?

Multiply each category score by its weight, add those products together, then divide by the total of the weights. For example, homework at 84 with weight 20 and tests at 91 with weight 50 give (84 times 20 plus 91 times 50) divided by (20 plus 50), which is about 89. The course grade tab does this for every row as you type.

What grade do I need on my final exam?

Use Required equals (Goal minus Current times (1 minus FinalWeight)) divided by FinalWeight, with the weight as a decimal. If your current grade is 88, you want 90, and the final is worth 25 percent, you need (90 minus 88 times 0.75) divided by 0.25, which is 96 on the final. The final and what if tab shows this plus the result for every possible final score.

How do I figure out a test score from the number wrong?

Subtract the number wrong from the total number of questions, divide by the total, and multiply by 100. Ten questions with two wrong is (10 minus 2) divided by 10, which is 80 percent. The test score tab also maps that percentage to a letter grade.

How do I calculate grades in Excel?

For a weighted grade use SUMPRODUCT, for example equals SUMPRODUCT(scores, weights) divided by SUM(weights). To find the score needed on a final, use equals (goal minus current times (1 minus weight)) divided by weight, with the weight as a decimal. This calculator does the same math without a spreadsheet.

How do percentages convert to letter grades?

A common scale is A from 93 to 100, A minus from 90 to 92, B plus from 87 to 89, on down to F below 60, though the plus and minus cutoffs vary by school. Your result shows both a percentage and a letter, but always confirm your school official scale.