Students · PRACTICAL GUIDE

How to Calculate a Weighted Grade

A course average depends on assessment weights, not simply the number of assignments. Start with the grading scheme in your course syllabus. A quiz worth 10% should have less influence than a project worth 40%, even if both are marked out of 100.

Work through an example

Suppose your coursework score is 80 and counts for 40% of the course. Your exam score is 90 and counts for 60%. Multiply 80 by 0.40 to get 32, then 90 by 0.60 to get 54. Adding the contributions gives a final grade of 86%. In our calculator, enter 80:40 and 90:60 on separate lines.

Check what the weights represent

Weights must total 100%. If the exam has not happened yet, do not silently include it as a zero. Either use the final exam calculator or calculate a completed-work average by renormalizing only the completed weights. Our weighted calculator deliberately rejects incomplete weight totals.

Use your school’s rules

Some institutions drop low scores, impose minimum exam marks or use letter-grade bands. This calculator does not implement those policies. Keep the unrounded result until the end and compare it with the official syllabus.

Written for Global Tools Hub · Reviewed 11 November 2026