Total points give larger assessments more influence
If an assignment earns 18 out of 20 and an exam earns 45 out of 50, the combined points grade is 63 / 70 × 100 = 90%. Both individual scores happen to be 90%, but the method matters when they differ. For 18/20 and 35/50, total points give 53/70 = 75.7143%, while the simple average of 90% and 70% gives 80%. These are different weighting systems, not different rounding rules.
Use Grade Calculator for this earned/possible relationship. Assignment Grade also supports explicit weighted rows when that is how the course is assessed. A maximum-point value must be positive. An empty assignment should not become an invented zero score, and a score above its stated maximum needs a documented extra-credit policy rather than an automatic assumption.
Weighted rows follow explicit proportions
A score of 80% with weight 40% and a score of 90% with weight 60% produce 86%. Do not enter raw earned points in a field labeled score percent. When supplied weights sum to less than 100%, the weighted tool describes the normalized average of that supplied portion and reports its coverage. It does not fill all unentered assessments with zero.
Weights should describe the same hierarchy. If exams are a course category worth 60%, and two exams each have a 50% share within that category, each exam has a 30% course weight. Mixing a category’s 60 with an internal 50 makes the input sum and denominator inconsistent. Write down whether each number is a course weight or a within-category share before combining it.
Project a final grade from an exam score
For completed coursework averaging 85%, a final exam score of 95% and a final weight of 40%, the projection is 85 × 0.60 + 95 × 0.40 = 89%. This is the forward task handled by Final Grade. The completed-work average describes the already completed portion before its share is applied; it is not a score already multiplied by 60%.
A zero exam weight leaves the coursework average unchanged. A 100% exam weight makes the projected grade equal to the exam score. The projection does not decide how a teacher rounds a final result, whether a letter-grade cutoff is inclusive, or whether a curve will be applied. Retain enough precision to compare with the published policy rather than rounding every intermediate value.
Solve a target without hiding an impossible score
For the same 85% coursework average and 40% remaining weight, reaching 90% requires (90 − 85 × 0.60) / 0.40 = 97.5% on the exam. Required Grade solves this inverse relationship. If the remaining weight is zero, there is no remaining exam contribution to solve for; the denominator is zero rather than a very large possible score.
A required score above 100% is outside a no-extra-credit model. A negative requirement means the target is already met even with zero on the remaining portion, under the entered assumptions. Neither case should be silently clamped because the sign and scale explain feasibility. Change a realistic assumption in the calculator only if the syllabus or instructor supports that change.
Questions before you calculate
Is the coursework average already weighted?
Enter the average of the completed portion before multiplying by its share of the whole course. If a gradebook already displays weighted course points, reconstruct the completed average from its coverage or use the gradebook’s documented calculation; do not multiply the same weight twice.
Can weights be guessed from point totals?
Only when the course uses a total-points system. Explicit category weighting can give a small assessment category more influence than its point total suggests. Follow the syllabus rather than assuming that assessment size always determines its weight.
Should I round a required score upwards?
Keep the exact computed target visible first. Then check the allowed exam increments and institutional rounding rule. Rounding a displayed target to a whole number can change whether it meets a threshold, so an explicit policy is more useful than a universal rounding recommendation.