Grade Calculator - Weighted Grades by Category

Price	100% free, no sign-up
Input	Categories with grades and weights
Output	Weighted overall grade and letter grade
Processing	Runs locally in your browser

What is Grade Calculator?

A weighted grade calculator turns a syllabus into a single number. Most courses do not count every point equally: homework might be 20% of the final grade while the final exam is 35%. Each category contributes its grade multiplied by its weight, and the total is divided by the sum of the weights. This calculator does that as you type, handles weights that do not add up to exactly 100 (useful mid-semester when some categories are not yet graded) and shows the resulting letter grade on the standard scale.

Common Uses for Grade Calculator

See your current standing when only some categories are graded
Check whether one more quiz can still lift a borderline grade
Verify the weighted average your learning management system reports
Model what happens if the final exam is heavier than expected

Weighted vs points-based grading

Weighted systems fix each category's share of the grade in advance, so a single 10-point quiz in a 20%-weighted quiz category carries the same influence as any other quiz. Points-based systems simply add every mark into one big pool. If your syllabus says 'total points', add up earned and possible marks instead of using weighted categories; if it names percentages, this calculator is the direct model.

Grades needed on the final

Once you know your current weighted grade, the final-exam question becomes a single formula: needed = (target − current × (1 − weight)) ÷ weight. It is handled on the final grade calculator, and the two tools are designed to be used together — check where you stand here, then find out what the exam has to deliver.

Frequently Asked Questions

What if my weights do not add up to 100%?

That is normal mid-semester. The calculator divides by whatever weights you entered, so the result stays on a percentage scale — it effectively projects the grade as if only the graded categories counted.

My class uses points, not percentages — does this work?

Yes. Enter the category scores as points out of the same maximum and use the category point values as weights. As long as both are on the same footing, the ratio comes out right.

How is the letter grade decided?

The overall percentage is mapped to a standard US letter scale (90–92 = A-, 93+ = A, 87–89 = B+, and so on). Individual courses can shift those boundaries — the calculator shows the percentage so you can apply your own syllabus cut-offs.

Can I include extra credit?

Model it as its own category with a small weight, or increase the grade of the category the extra credit lands in. Extra credit that pushes a category above 100% will pull the overall grade up exactly as it does in a gradebook.