Mirror your syllabus
Homework 20%, quizzes 20%, midterm 30% — set up the same categories your instructor uses and drop your scores in.
Syllabus rules that change the math
Five things to check before you trust any grade calculator number — including this one.
Do your weights add up to 100?
They don't have to — the calculator scales whatever you enter to 100%. But if your syllabus says 20/20/30/30 and you typed 20/20/30, the missing 30 changes everything. Double-check against the syllabus.
Does your teacher drop the lowest score?
Drop-lowest policies are common for quizzes and homework. If yours does, leave your lowest score out of that category's average before entering it.
Ungraded work counts for nothing — yet
By default Canvas leaves ungraded work out of your total — the scary drop appears when a teacher enters zeros for missing work. This calculator also excludes ungraded items, matching how current grades are actually computed.
Points and percentages mix badly
If your syllabus is points-based, use points mode instead of guessing percentage weights. A 40-point quiz and a 200-point exam already encode their own weights.
Category averages hide variance
A 92 homework average with one missing assignment at zero is very different from a steady 92. Enter each category's true average from your portal, not the number you remember.
Standard US letter grade scale
| Letter | Minimum | GPA |
|---|---|---|
| A+ | 97% | 4.0 |
| A | 93% | 4.0 |
| A- | 90% | 3.7 |
| B+ | 87% | 3.3 |
| B | 83% | 3.0 |
| B- | 80% | 2.7 |
| C+ | 77% | 2.3 |
| C | 73% | 2.0 |
| C- | 70% | 1.7 |
| D+ | 67% | 1.3 |
| D | 63% | 1.0 |
| D- | 60% | 0.7 |
| F | 0% | 0.0 |
Most US schools use this 4.0-scale mapping. Your school's cutoffs may differ — the syllabus always wins.
How this grade calculator works
Set up once, reuse all semester.
- 1
Add your categories
Copy the grading section of your syllabus: each category's name and weight. Four starter rows are ready to edit.
- 2
Enter the scores you have
Leave anything ungraded blank — it simply doesn't count yet, and shows up as open weight instead.
- 3
Read your standing
Your class grade, its letter, and your best case update live. Come back after every graded assignment.
What this grade calculator actually calculates
A grade calculator turns a pile of scores into one number the way your instructor does: each category's average is multiplied by its weight, and the results are added up. Only graded work counts — if your teacher hasn't graded the midterm yet, its weight is excluded and the rest is scaled to 100%.
“When a Student looks at their final grade, the blank item will not be included in the calculation, and the assignment counts neither for nor against their score appearing as if it has been Excused.”
Show the formula and a worked example
Grade = Σ(category score × category weight) ÷ Σ(graded weight)Example: (92×20 + 84×20 + 78×30) ÷ (20+20+30) = 83.7%. Ungraded categories are left out of both sums until they have scores.
Say homework (20%) sits at 92, quizzes (20%) at 84, and the midterm (30%) came back as an 78, with a final (30%) still to come. Your current grade is (92×20 + 84×20 + 78×30) ÷ 70 = 83.7% — a B, with 30% of the class still open. Best case if you ace the final: 88.6%.
That "still open" share is the number worth watching. A class that's 70% graded can still move almost a full letter; a class that's 95% graded is nearly locked in. The calculator shows both so you know where effort still pays.
Built to match how classes actually grade
Points mode included
Some classes count points, not percentages. Enter points earned over points possible per assignment and get the same clean answer.
Best case and open weight
See the highest grade still possible if you ace everything left, and how much of your grade is still ungraded.
Nothing leaves the page
Scores stay in your browser. No account, no upload — ads on this page cannot read what you type.
Who this is for
One gradebook, four ways to use it.
High school
Know before the report card does
Progress reports lag reality by weeks. Rebuild your class grade from your own scores and you'll know exactly where you stand today — and whether the next quiz can pull a B+ up to an A- before grades lock.
Grade calculator questions, answered
How do I calculate my grade by hand?
Multiply each category average by its weight, add the results, and divide by the total weight of graded work. Homework 92 at 20% and a midterm 78 at 30% gives (92×20 + 78×30) ÷ 50 = 83.6%.
What's the difference between weighted and unweighted grades?
Unweighted averaging treats every assignment equally. Weighted grading makes some categories count more — a 30% midterm moves your grade six times as much as a 5% quiz, no matter how many points each is worth.
Why does my portal show a lower grade than this calculator?
Most often because the portal counts missing work as zeros or includes ungraded items. Enter only what's actually been graded here and you'll get the number your instructor would quote you.
How much will one zero hurt my grade?
Depends on the category. A zero on one of ten equal homework assignments inside a 20% category costs 2% of your final grade at most. A zero on a 30% midterm is catastrophic. Enter it and see.
Can I use letter grades instead of percentages?
Convert letters to the midpoint of their range first — a B+ is roughly an 88.5. The letter scale on this page shows each band's cutoffs.
How do I convert points to a percentage?
Points earned divided by points possible, times 100. Points mode does this per row automatically — 152 out of 200 is 76%.
Does a 89.5 count as an A-?
Only if your instructor rounds. Syllabi with hard cutoffs treat 89.99 as a B+. Ask early, not during finals week.
Does this grade calculator work for middle school and college?
Yes — any class graded with weighted categories or points uses the same math, from sixth-grade science to a 300-level lecture. Set the categories your syllabus defines and the grade calculator does the rest.
What about the final exam I haven't taken?
That's the one question this page doesn't answer — the final grade calculator on the home page takes your current grade and the exam's weight and tells you the score you need.
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