What grade do I need on the final?
final grade = current average × (1 − p) + exam grade × p
Enter your current average, the exam’s weight in the final grade and the target you are aiming for: the tool calculates the exact grade you need, and tells you honestly whether the target is achievable, already secured even with a zero, or out of reach no matter how well you do. Works on a 100-point, 20-point or any other scale.
83 / 100
- Calculation
- x = (80 − 78 × (1 − 40%)) ÷ 40% = 83
Achievable: you need at least 83 / 100 on the exam.
Scientific dossier
What the tool computes, what it assumes, where it stops being valid, and where its data comes from.
Method & formulasfinal grade = current average × (1 − p) + exam grade × p
final grade = current average × (1 − p) + exam grade × p
grade needed x = (target − current average × (1 − p)) / p
p is the exam weight as a fraction (40% → 0.4). The first line is the definition of a two-part weighted average: what you already have (weight 1 − p) and what the exam will contribute (weight p). The second is the same equation solved for the exam grade. When p = 100%, everything rides on the exam and the grade you need is the target itself.
- Exam weight (p)
- · the exam’s share of the final grade, set by your course syllabus. Coefficients, coursework percentages, etc. If your final “counts for 2 out of a total of 5 credits”, its weight is 2/5 = 40%.
- Already secured
- · the calculated grade needed is negative: even a zero on the exam leaves your final grade above the target.
- Out of reach
- · the grade needed exceeds the top of the scale: no exam performance is enough. The tool then shows the best final grade still possible.
Validity domainThe calculation assumes the final grade is a linear weighted combination, the general case in grading policies.
The calculation assumes the final grade is a linear weighted combination, the general case in grading policies. It does not model special rules: minimum-grade requirements, compensation thresholds between courses, jury rounding. Extra credit above the scale. The calculated grade is exact for the weighted rule; your institution applies its full policy.
Common pitfall: a good average protects you less than you thinkThe heavier the exam weighs, the more your current average (good or bad) fades away.
The heavier the exam weighs, the more your current average (good or bad) fades away. With a 78/100 average and a final worth 60%, aiming for 70 still requires 64.7: the 78 only covers 40% of the outcome. Conversely, a weak average recovers all the better when the final weighs a lot. The weight p decides everything; check it in the syllabus before calculating.