Final Grade Calculator
Find the score you need on your final exam to hit your target grade.
A score above 100 isn’t possible on most exams. Lower your target or look for extra credit.
Your overall course grade for each possible final score.
To find the grade you need on a final, use required = (target − current × (1 − weight)) ÷ weight. For a 75% current grade, an 85% target, and a final worth 30%, you’d need 108.3% — meaning the target isn’t reachable and should be lowered.
How the final grade formula works
Everything you have done so far — homework, quizzes, midterms — is already baked into your current grade. The only unknown left is the final. If the final is worth 30% of the course, then your current grade is locked in at the other 70%, and you just need to work out how much the final has to contribute.
grades in percent, weight as a decimal (30% = 0.30)
Worked example
Current grade 75, target 85, final worth 30%:
- 1 Lock in your current grade. It counts for everything but the final: 75 × (1 − 0.30) = 52.5 points toward the course.
- 2 Find the points the final must add. Subtract from the target: 85 − 52.5 = 32.5 points still needed.
- 3 Divide by the final’s weight. 32.5 ÷ 0.30 = 108.3 — above 100, so this target isn’t reachable. Drop the target to 80 and you’d need 91.7.
Common scenarios
The result is above 100. The target can’t be reached with the weight left on the final. Lower the target, or ask whether extra credit is available.
The result is zero or negative. Your completed work already secures the target — you could skip the final and still hit your goal (check your syllabus for minimum-final rules).
You need 70–90%. Realistic but real work. This is where focused, spaced revision pays off the most.
You need below 50%. You are comfortably ahead. Don’t coast, but the pressure is off.
Translating a letter target to a percentage
If your target is a letter grade, convert it to the bottom of its range first — aiming for the floor keeps you safe.
US letter-grade scale
Common high-school / undergraduate scale; check your syllabus for exact cutoffs.
| Letter | Percentage | GPA (4.0) |
|---|---|---|
| A | 90–100 | 4.0 |
| B | 80–89 | 3.0 |
| C | 70–79 | 2.0 |
| D | 60–69 | 1.0 |
| F | below 60 | 0.0 |