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Finals Calculator

Calculate the final exam score needed to reach a target course grade.

Your current grade before the final exam, as a percentage.

The overall course grade you want after the final exam.

How much the final exam is worth as a percentage of the course grade.

Optional. Enter an actual or planned final exam score to project your course grade.

Status: initial

Results

Awaiting calculation

Calculator guide

Introduction

The Finals Calculator helps students estimate what score they need on a final exam to reach a target overall class grade.

Purpose

Use this calculator during finals week to plan target scores and understand how the final exam weight affects the course grade.

Final exam method

Convert the final exam weight to a decimal, find the current grade contribution, subtract that contribution from the target grade, and divide by the final exam weight.

Variable explanations

Current grade

Your grade before the final exam.

Target grade

The final course grade you want.

Final weight

The percentage of the course grade assigned to the final exam.

Required score

The final exam score needed to hit the target grade.

Projected grade

The course grade produced by an actual or planned final exam score.

Formula guide

Required final score

F = (G - C x (1 - w)) / w

  • F is the required final exam score.
  • G is the target course grade.
  • C is the current grade.
  • w is final weight as a decimal.

Use this before the final exam when you know your current grade and target.

Projected course grade

G = F x w + C x (1 - w)

  • F is the final exam score.
  • w is the final exam weight.
  • C is the current grade.

Use this after the final exam or when testing a possible final score.

Weight conversion

w = final exam weight / 100

  • Final exam weight is entered as a percentage.

A 40% final exam has w = 0.40.

Worked examples

Reach a 90

  1. Current grade 85, target 90, final weight 40 gives required final score 97.5%.

Project a grade

  1. Current grade 91, final score 88.6, final weight 15 gives projected course grade 90.64%.

Goal above 100

  1. If the required score is above 100%, the goal may require extra credit or a different grading assumption.

Common mistakes

Using final weight as a decimal

Enter 40 for a 40% final, not 0.40.

Including the final in current grade

The current grade should usually be the grade before the final exam is included.

Ignoring category rules

Some gradebooks weight categories differently, so check the syllabus.

Assuming all schools cap scores at 100

Some courses allow extra credit, while others cap exam scores at 100.

FAQs

What does this Final Exam Calculator do?
It calculates the final exam score needed to reach a target overall course grade.
What formula does it use?
Required final score = (target grade - current grade x (1 - final weight)) / final weight.
How do I enter final exam weight?
Enter it as a percentage, such as 40 for a final worth 40%.
What is current course grade?
It is your course grade before the final exam is included.
Can I enter my actual final score?
Yes. The optional final exam score field projects your course grade.
What if the required score is above 100%?
Under standard scoring, the target is not reachable without extra credit or changed assumptions.
What if the required score is below 0%?
That means the target is already reached before the final under the entered assumptions.
Can this handle extra credit?
It accepts percentages above 100, but your official gradebook may handle extra credit differently.
Does this work with letter grades?
Convert letter grades to percentages first using your course grading scale.
Does this replace my official gradebook?
No. It is an estimate based on the inputs and formula.
Can this calculate category-weighted finals?
Only if the final exam weight is known as a direct percentage of the course grade.
What if my final is optional?
Set the weight according to the rule your instructor uses, or ask for clarification.
Why does my gradebook differ?
Gradebooks may use drops, category weights, rounding, caps, or extra credit rules.
Can the target grade be over 100?
Yes, for what-if extra-credit planning, but many classes cap overall grades at 100.
Is this the same as a grade average calculator?
No. A grade average calculator combines scores; this calculator solves for a final exam target.

References

Related calculators

Last updated and version history

Last updated: 2026-07-09

  • 1.0.0 (2026-07-09): Initial finals calculator page using the verified final exam engine.