Grade Calculator
Work out your class grade from weighted assignments, quizzes and exams, or from total points. Advanced adds categories with drop lowest, letter scales, the score you need on the rest, and a test score and teacher grading table.
Type a score as a % (85), points (18/20) or a letter (B+). Leave the score blank for work that hasn't been marked yet.
Put several scores in one row, separated by commas, to make it a category (Quizzes: 8/10, 9/10, 7/10).
Points for work that hasn't been marked yet, such as a 100-point final. Used for the range and the score you need.
Adding up points lets a 50-point test count more than a 10-point quiz. Most gradebooks do this.
Shows the average you need on all the work still to come. For one final exam, the final grade calculator goes further.
Each grade starts at the % shown. Change any of them to match your school.
Planning ahead? See what you need on the final, or turn letter grades into a GPA.
How your grade is worked out
Grade = each score × its weight, added up, ÷ the weight graded so far.
- 1
Score each row
3 rows scored
= 92 · 85 · 78% - 2
Times its weight
20×92 + 30×85 + 25×78
= 6,340 - 3
Divide by weight
6,340 ÷ 75
= 84.53% - 4
Your letter
84.53% on US + / −
= B
Read more: the formula, a worked example, letter grades and test scores
Your class grade is a weighted average. Each assignment or category gets a score, each score is multiplied by how much it counts, and the total is divided by the weight that has been marked so far. Work with no score yet is left out, so the result is your grade right now.
The formula
grade now = (weight 1 × score 1 + weight 2 × score 2 + …) ÷ (total weight of rows with a score)
with total points: grade = points earned ÷ points possible × 100
needed on the rest = (grade wanted × course total − weighted points banked) ÷ weight still to come
test score = (questions − wrong) ÷ questions × 100
Worked example
Homework is 92% and counts 20%, quizzes are 85% and count 30%, and the midterm is 78% and counts 25%. The final exam (25%) hasn't been marked yet.
20 × 92 = 1,840. 30 × 85 = 2,550. 25 × 78 = 1,950. Added up that's 6,340. Only 20 + 30 + 25 = 75% of the course has been graded, so your grade now is 6,340 ÷ 75 = 84.53%, a B on the US scale with plus and minus grades (B is 83% to just under 87%).
Each row's share of the whole course is its weight × score ÷ 100: homework adds 18.4 points, quizzes 25.5 and the midterm 19.5, which is 63.4 points banked out of 100.
Lowest and highest you can finish with. A 0 on the final leaves you on 6,340 ÷ 100 = 63.4% (a D). 100% on the final gives (6,340 + 25 × 100) ÷ 100 = 88.4% (a B+).
What you need for 85%. (85 × 100 − 6,340) ÷ 25 = 2,160 ÷ 25 = 86.4% on the final.
Categories and drop lowest
Put several scores in one row to make a category. Quizzes of 18/20, 17/20, 20/20 and 15/20 are 70 points out of 80 = 87.5% when you add up the points. Drop the lowest one and it becomes 55 out of 60 = 91.67%. The calculator drops the scores with the lowest percentage and always keeps at least one.
Some teachers count every score the same instead of adding points. Scores of 9/10 and 40/50 are 49 out of 60 = 81.67% by points, but (90 + 80) ÷ 2 = 85% if each counts the same.
Total points classes
If your syllabus lists points instead of percentages, add up everything you've earned and everything possible. 177 points out of 210 is 177 ÷ 210 × 100 = 84.29%. With a 100-point final still to come, the course totals 310 points: a 0 leaves you on 177 ÷ 310 = 57.1% and full marks give 277 ÷ 310 = 89.35%.
Letter scores
A letter typed as a score counts as the middle of its band on your scale. On the US scale with + and −, B+ (87 to 90) counts as 88.5% and A+ (97 to 100) as 98.5%. On the plain US scale a B counts as 85%. F counts as the middle of 0 and the D cut-off, so 30%. If your teacher uses other values, type the % instead.
Test scores and grading tables
With 20 questions and 3 wrong you got 17 right: 17 ÷ 20 × 100 = 85%, a B. Each question is worth 100 ÷ 20 = 5%. Teachers can switch on the grading table to see the score for every number wrong, in whole or half marks, like a printed EZ grader chart.
Grading scales
| Scale | Grades start at |
|---|---|
| US with + and − | A+ 97 · A 93 · A− 90 · B+ 87 · B 83 · B− 80 · C+ 77 · C 73 · C− 70 · D+ 67 · D 63 · D− 60 |
| US letters | A 90 · B 80 · C 70 · D 60 · F below 60 |
| 7-point scale | A 93 · B 85 · C 77 · D 70 · F below 70 |
| UK university | First 70 · 2:1 60 · 2:2 50 · Third 40 |
| Pass or fail | Pass 50 |
These are common cut-offs, not rules. Schools, colleges and single teachers set their own, and some round up (89.5% may count as an A). Pick Custom to match your syllabus, or "Percentage only" if your country doesn't use letters.
Good to know
- If the weights add up to more than 100, the calculator treats their total as the whole course.
- If they add up to less than 100 and every row has a score, the rest is counted as work still to come.
- Extra credit is fine: a score like 22/20 or 105 counts as more than 100%.
Common questions
How do I calculate my grade?
Multiply each score by its weight, add them up and divide by the total weight graded so far. Homework 92% (20%), quizzes 85% (30%) and a midterm of 78% (25%) give (20 × 92 + 30 × 85 + 25 × 78) ÷ 75 = 6,340 ÷ 75 = 84.53%, a B on the US scale with plus and minus grades.
Why divide by the weight graded so far and not by 100?
Your grade now should only count work that has been marked. If the final exam (25%) hasn't happened, only 75% of the course has a score, so you divide by 75. Dividing by 100 would treat the missing exam as a zero and show 63.4%, the lowest you could still finish with.
How do I calculate my grade with total points?
Add up all the points you've earned and all the points possible, then divide. 177 points out of 210 is 177 ÷ 210 = 84.29%. In a points class, a 100-point test counts ten times as much as a 10-point quiz, so no weights are needed.
How do I work out a test grade from the number wrong?
Take the wrong answers away from the number of questions, divide by the number of questions and multiply by 100. With 20 questions and 3 wrong, (20 − 3) ÷ 20 × 100 = 85%. Each question is worth 100 ÷ 20 = 5%.
What do I need on the rest of the course to get an 85?
Multiply the grade you want by the course total, take away what you've already banked and divide by the weight still to come. With 6,340 banked and 25% left, (85 × 100 − 6,340) ÷ 25 = 86.4% on the remaining work. For one final exam, use the final grade calculator.
What letter grade is 84.5%?
On the US scale with plus and minus grades, B runs from 83% to just under 87%, so 84.53% is a B. On the plain US scale it's also a B (80–89%). Schools set their own cut-offs, so pick a preset or type your own scale in Advanced.
Related calculators
Made by Zulu Calculator, part of AlphaZulu LLC. Formulas are shown in full and rule figures are checked against official sources; see how we build calculators.