What is the formula for calculating the needed final grade?

Final needed = (Target − Current × (1 − Final Weight)) ÷ Final Weight. All percentages are expressed as decimals in the formula (e.g., 30% = 0.30).

What if the result is over 100%?

That means your target grade is mathematically impossible given your current grade and the final's weight. Consider adjusting your target or looking into extra credit opportunities.

Can I use this with a letter grade scale instead of percentages?

Convert your letter grade to a percentage first (e.g., A = 93%, B = 83%), then use this calculator. Use our GPA Calculator to convert GPA to letter grades.

What if my professor curves grades?

This calculator uses exact percentages. If your professor curves, your actual needed score may be lower than shown. Check with your instructor for curve policies.

Final Grade Calculator

Enter your current grade, the weight of your final exam, and your target grade. The calculator tells you exactly what score you need on the final — or whether it's already mathematically impossible or already secured.

Enter your grades

Fill in the three values to calculate the required final exam score.

Current Grade (%)

Your grade before the final exam

Final Exam Weight (%)

What percentage of your total grade is the final?

Target Grade (%)

The minimum grade you want in the course

All calculations run in your browser.

Results update instantly as you type.

Final Exam Score Needed

Based on your inputs, here is what you need on the final.

Enter your grades to begin

Fill in your current grade, final exam weight, and target grade.

How the Calculation Works

The formula: Final needed = (Target − Current × (1 − Final Weight)) ÷ Final Weight. For example: target 90%, current grade 88%, final worth 30% → needed = (90 − 88×0.70) ÷ 0.30 = 94.67%.

Already secured: If your current grade × (1 − final weight) ≥ target, you've already locked in your target grade even if you score 0 on the final.

Not possible: If the needed score exceeds 100%, even a perfect final won't reach your target. The maximum possible grade is: Current × (1 − Final Weight) + 100 × Final Weight.

Frequently Asked Questions

What is the formula for calculating the needed final grade?: Final needed = (Target − Current × (1 − Final Weight)) ÷ Final Weight. All percentages are expressed as decimals in the formula (e.g., 30% = 0.30).
What if the result is over 100%?: That means your target grade is mathematically impossible given your current grade and the final's weight. Consider adjusting your target or looking into extra credit opportunities.
Can I use this with a letter grade scale instead of percentages?: Convert your letter grade to a percentage first (e.g., A = 93%, B = 83%), then use this calculator. Use our GPA Calculator to convert GPA to letter grades.
What if my professor curves grades?: This calculator uses exact percentages. If your professor curves, your actual needed score may be lower than shown. Check with your instructor for curve policies.

References

Grade calculation methodology.

College Board BigFuture — How to Calculate GPA on a 4.0 Scale

Official College Board guidance on how final exam weights combine with pre-final scores to determine a course grade.

UC Berkeley Registrar — Grade Definitions

University of California, Berkeley Registrar's Office: authoritative reference on academic grading arithmetic.

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