Grade Calculator

The formula, and what it assumes

Your current grade is the weighted average of the categories you have completed. The score you need on the final is (target − current × completed weight) / final weight. It assumes the weights add to 100 per cent and that nothing else changes — no dropped lowest quiz, no curve, no extra credit.

When the answer is above 100

A required score above 100 means the target is not reachable through the final alone. That is worth knowing early, because the response is different: extra credit, a regrade request, or adjusting the target. Many calculators print a number above 100 without comment, which is technically correct arithmetic and practically useless.

Check the weights before trusting anything

If your categories plus the final do not add to 100 per cent, every figure here is wrong — and syllabus weights frequently do not match what the gradebook actually does. The page shows the weight accounted for so you can check it against your syllabus before relying on the result.

Weighted categories and points-based courses are not the same system

A points-based course adds up everything earned and divides by everything available, so a 10-point quiz and a 200-point final sit on the same scale automatically. A weighted course assigns each category a fixed share of the grade regardless of how many points it contains, which means a single low homework score in a category worth 10 per cent can matter less than losing the same number of points on an exam worth 40. Reading the syllabus to find which system applies is the first step; the arithmetic is straightforward once that is settled.

Two policies change the answer this page gives and are worth checking before relying on it. The first is a dropped lowest score, common for quizzes and homework, which quietly raises the current average and lowers the score needed on the final. The second is a grade floor or a rounding rule: a course that rounds 89.5 up to an A has a different target than one that does not round at all, and the difference is frequently the whole letter grade.

Frequently Asked Questions