Weighted grade average calculator
Enter your grades and their weights as two lists. You get the weighted average, the unweighted one for comparison, and the mark you would need on a remaining assessment to hit a target.
- As a percentage
- 73.1 %
- Unweighted average
- 14.000
- Grades entered
- 4
- Total weight
- 8.00
- Best grade
- 16.00
- Worst grade
- 11.00
- Needed on what is left
- 16.50
The formula
Weighted average = Σ(grade × weight) / Σ(weight). The mark needed is (target × (total weight + remaining) − weighted total) / remaining.
Worked example
Grades of 14, 16, 11 and 15 with weights 2, 3, 1 and 2: a weighted average of 14.625 out of 20, against an unweighted 14. To reach 15 overall with a remaining weight of 2, you would need 16.5 on it.
How to use it
- 1Separate values with commas or spaces. The two lists must have the same number of entries, or leave the weights blank to treat everything equally.
- 2Weights are usually coefficients or credit hours — use whatever your institution uses; only the ratios matter.
- 3A needed mark above the scale maximum means the target is out of reach from what remains.
Questions people ask
Can this convert my average between national scales?
No, and no calculator honestly can. A 14/20 is not a fixed GPA: conversion depends on the institution's own table and on grade distributions. Ask the receiving institution for theirs.
Why does the weighted average differ from the simple one?
Because heavier subjects count more. If your best grade carries the smallest weight, the weighted average will be lower — which is the figure that goes on the transcript.
Last reviewed: 2026-10-20