How to calculate a weighted grade
Here it is with your numbers:
- Multiply each average by its weight and add them up: (92 × 20) + (85 × 30) = 4,390.
- Add up the weights of the graded categories: 20 + 30 = 50.
- Divide: 4,390 ÷ 50 = 87.8%.
It means you have a B (87.8%) so far, and an A starts at 90%. 1 category isn’t graded yet, so this can still change. To reach 90% you need 92.2% on the ungraded work.
Source Instructure (Canvas) · How weighted course grades are calculated ↗
Missing categories and the grade you want
A blank average means “not graded yet” and is left out, the same way school gradebooks like Canvas work. The grade you want is then worked out for that ungraded weight: (goal × total weight − points you have) ÷ weight left. If it comes out above 100%, the goal can’t be reached from the work that’s left.
Weighted grade examples
Letter grades and the 4.0 scale
| Letter | Percent | GPA points |
|---|---|---|
| AYou | 90 – 100% | 4.0 |
| BYou | 80 – 89% | 3.0 |
| CYou | 70 – 79% | 2.0 |
| DYou | 65 – 69% | 1.0 |
| FYou | Below 65% | 0.0 |
This is one common scale. Schools set their own cutoffs, so check your syllabus. The College Board’s table jumps from D at 66 to F below 65, so we count 65 as a D.
Source College Board · How to calculate your GPA on a 4.0 scale ↗
FAQs
How do you calculate a grade with weights?
Multiply each category’s average by its weight, add them up, and divide by the total weight. With 75% at 20%, 98% at 50% and 87% at 30%: 75 × 0.20 + 98 × 0.50 + 87 × 0.30 = 90.1.
Source Instructure (Canvas) · How weighted course grades are calculated ↗
How do you calculate a weighted grade with missing assignments?
Gradebooks like Canvas leave out a category with nothing graded yet and divide by the weights that are left. With 75% at 20% and 98% at 50% and nothing graded in the 30% category, that is (0.75 × 0.20 + 0.98 × 0.50) ÷ 0.70 = 91.43%.
What grade do I need on the rest of the course?
Multiply the grade you want by the total weight, subtract the weighted points you already have, and divide by the weight left. With 92% at 20% and 85% at 30%, you need 92.2% on the last 50% to finish with 90%. Enter the goal above and the calculator does it for you.
How do you turn a percentage into a letter grade?
On a common scale, 90 – 100% is an A, 80 – 89% a B, 70 – 79% a C, the upper 60s a D, and below 65% an F. Schools set their own cutoffs, so check your syllabus.
Source College Board · How to calculate your GPA on a 4.0 scale ↗
Sources
- Instructure (Canvas): How weighted course grades are calculated
- College Board: How to calculate your GPA on a 4.0 scale