Weighted Grade Calculator
Most courses don't average scores equally — they weight categories. Enter each category's grade and its share of the course to get your true current standing.
Weights that don't total 100% are normalized automatically.
How weighted grades work
Each category grade is multiplied by its weight, the results are summed, and the total is divided by the combined weight. If homework (20%) sits at 95, the midterm (40%) at 78 and the final (40%) is still ahead, your current grade is (95×20 + 78×40) ÷ 60 = 83.7% — not the 86.5 a plain average would claim.
Worth knowing
The final isn't all-or-nothing
Because finals are usually worth 20–40%, your semester of work is protecting you more than you think. Run the numbers: the score you actually need is often lower — sometimes dramatically lower — than the panic estimate.
Confirm the scale in your syllabus
The 90/80/70/60 letter cutoffs used here are the most common US scale, but plenty of courses curve, use plus/minus bands differently, or set an A at 94. The syllabus — not any calculator — is the contract that counts.
Ask about rounding before finals week
An 89.5 is an A- in some classes and a B+ in others. Professors have wildly different rounding policies, and the polite time to ask is mid-semester, not the night grades post.
Common questions
Do these calculators store my grades?
No. Everything is computed in your browser the moment you press Calculate — nothing is uploaded, saved or seen by anyone else. Refresh the page and it's gone.
How are letter grades calculated from percentages?
Most US schools map percentages to letters in 10-point bands: 90–100 is an A range, 80–89 a B range, 70–79 a C range, 60–69 a D range, and below 60 an F. Plus/minus splits each band roughly in thirds (e.g. 90–92 = A-, 93–96 = A, 97+ = A+). Individual schools and professors can and do vary the cutoffs.
What's the difference between weighted and unweighted averages?
An unweighted average treats every score equally: add them up, divide by the count. A weighted average multiplies each category by its share of the grade first — homework 20%, midterms 40%, final 40% — which is how most courses actually work. If your syllabus lists category percentages, you need the weighted version.