Final Grade Calculator

Enter your current grade, the overall grade you want and how much the final exam is worth to see the score you need on the final - and whether the target is already secured or out of reach. A what-if table shows the score needed for each letter grade.

Free, no signupNo daily limitRuns in your browser - nothing you enter is uploadedUpdated 7 October 2026

Current grade (%)Your grade on everything before the final

Grade you want (%)Your target for the whole course

Final exam weight (%)How much of the course grade the final is worth

You need on the final

What-if table

Score needed on the final for each overall grade, using your current grade and weight. Cut-offs A 90, B 80, C 70, D 60.

Overall grade	Needed on final	Status

Or check a score: if I get

% on the final, my course grade will be -

The formula, and why it works

Your course grade after the final is a weighted average of two numbers: what you have now and what you score on the final.

course grade = current × (1 − w) + final × w

Solve that for the final score and you get the formula this calculator uses, with w as a decimal (40% = 0.4):

required final = (target − current × (1 − w)) ÷ w

Two results need a word of explanation. A required score above 100% means the target is out of reach on the final alone - it is shown, not hidden, so you can see by how much. A required score of 0 or less means the target is already secured: even a zero on the final keeps you there.

If your class is graded in points rather than percentages, convert first: the final's weight is its points divided by the course total, and your current grade is points earned so far divided by points possible so far. If you are not sure of your current grade, work it out with the Grade Calculator.

Worked example

Current grade 80%, final exam worth 40%.

target 85: (85 − 80 × 0.6) ÷ 0.4 = (85 − 48) ÷ 0.4 = 92.5% target 90: (90 − 48) ÷ 0.4 = 105% → above 100%, out of reach target 80: (80 − 48) ÷ 0.4 = 80%

So this student can still reach 85% with a strong final, but 90% would need extra credit.

What this calculator does not do

It assumes the final is the only graded work left; if other assignments remain, include them in the weight or use the Grade Calculator.
The what-if table uses the common A 90, B 80, C 70, D 60 cut-offs; your syllabus may differ.
Curves, dropped scores and extra credit are not modelled.

Frequently asked questions

How do I calculate what I need on my final exam?

Required score = (target − current × (1 − w)) ÷ w, where w is the final's weight as a decimal. With a current grade of 80, a target of 85 and a final worth 40%: (85 − 80 × 0.6) ÷ 0.4 = 92.5%.

What does it mean if I need more than 100%?

It means the target cannot be reached with the final exam alone unless there is extra credit. The calculator still shows the number - for example 105% - so you know how far off it is, and the what-if table shows which grades are still possible.

What if the required score is 0 or negative?

Then the target is already secured: even a 0 on the final would leave you at or above the grade you want.

What should I enter as my current grade?

Your grade on everything except the final, as a percentage. If you are not sure, work it out from your scores and weights with the Grade Calculator first.

What if the final is worth 100%?

Then your current grade does not matter and the score you need equals your target.

Does it work for points-based classes?

Yes, if you convert to percentages: the final's weight is its points divided by the total points in the course, and your current grade is your points so far divided by the points possible so far.

Related free tools

Grade CalculatorCurrent class grade from scores and weights, with a letter grade and weight check.

GPA CalculatorSemester GPA and new CGPA from credits and grades, on 4.0, 5.0 or your own scale.

Percentage CalculatorX% of Y, percent of a total, increase/decrease, add or remove a percent, and marks.

Classroom TimerBig full-screen countdown, stopwatch and Pomodoro for projectors and exams.

Step-by-step guide: What do I need on my final exam? →

Built and checked by Taimur Hassan Siddiqui, who has more than ten years in computer-science education. The formulas on this page are covered by an automated test suite, and the worked example on this page is one of its cases. Last updated 7 October 2026.