Final grade calculator
Calculator
The calculator needs JavaScript. The tables below give the same numbers for common cases.
How it is worked out
- Final grade = current × (1 − weight) + final score × weight.
- Solve for the final score: (90 − 84 × 0.75) ÷ 0.25 = 108.
| Inputs | Answer |
|---|---|
| Current grade: 84; Grade you want in the class: 90; Weight of the final exam: 25 | To finish with 90% you need about 108% on the final (more than 100%, so it is out of reach without extra credit). |
| Current grade: 84; Grade you want in the class: 80; Weight of the final exam: 25 | To finish with 80% you need about 68% on the final. |
| Current grade: 72; Grade you want in the class: 70; Weight of the final exam: 40 | To finish with 70% you need about 67% on the final. |
How to use it
Final course grade = current grade × (1 − final weight) + final score × final weight. Solving for the final score gives: needed = (wanted − current × (1 − weight)) ÷ weight. With 84% now, a 25% final and a 90% goal you would need 108%: out of reach without extra credit. For an 80% goal you need 68%.
The calculator also shows the course grade you would end with if you scored 0% or 100% on the final.
Frequently asked questions
What do I need on my final to get an A?
Enter your current grade, the grade you want and the weight of the final.
What if the answer is over 100%?
The grade is out of reach without extra credit.
How do I find the weight of the final?
It is in your syllabus.
Method: standard arithmetic shown step by step; no outside data is used. Checked 2026-11-12.
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General information only. Results are plain arithmetic on the numbers you enter; check anything important (money, health, school work) against your own records or the official source.