Free Student Calculator

Grade Calculator

Calculate an assignment, class or test grade from points earned or questions correct. See your percentage, letter grade, questions missed and how many questions you can miss while still reaching a target grade.

Grade formula Grade percentage = points earned ÷ points possible × 100. For a test, you can use questions correct ÷ total questions × 100.

Calculate Your Grade

Use points for assignments and classes, or switch to questions for tests and quizzes.

Used for “how many can I miss?”
Calculated grade
84.00% · B

Incorrect / missed8
Points lost8.00
Max you can miss for target5

Score-to-Grade Table

This table uses your current total possible points/questions and selected grading scale.

Correct / earnedMissedPercentageLetter grade

How to Calculate a Grade

Divide the points you earned by the total points possible, then multiply by 100. The result is your percentage grade.

Grade percentage = (points earned ÷ points possible) × 100

Grade Calculator for Tests and Quizzes

For a test, enter the number of questions you answered correctly and the total number of questions. The calculator also shows how many you missed and converts the score into a letter grade using your selected scale.

How Many Questions Can I Miss?

Enter your target percentage. The calculator determines the minimum number of correct answers needed, then shows how many questions you can miss while still reaching that target.

For example, on a 50-question test with a 90% target, you need at least 45 correct answers. That means you can miss up to 5 questions.

Assignment Grade Calculator

This page also works as an assignment grade calculator. If an assignment is worth 80 points and you earned 68, enter 68 as points earned and 80 as points possible. Your grade is 85%.

Class Grade Calculator vs Weighted Grade Calculator

If you only need to convert one score into a percentage and letter grade, use this page. If your class has homework, quizzes, projects and exams with different weights, use the Weighted Grade Calculator.

Need to Know What You Need on Your Final?

If you already know your current course grade and final exam weight, use the Final Grade Calculator to calculate the exact score needed on the final.

Common Grade Scales

Schools do not all use the same grading scale. The default +/- scale in this calculator is only a common reference. Use the custom scale option if your school has different cutoffs.

Frequently Asked Questions

How do I turn points into a percentage grade?

Divide earned points by total possible points and multiply by 100.

How do I calculate a test grade?

Divide questions correct by total questions and multiply by 100. The questions mode does this automatically.

How many questions can I miss and still get an A?

Enter the percentage required for an A as your target. The calculator shows the maximum number of questions you can miss while still reaching that percentage.

Can I use a custom grading scale?

Yes. Choose Custom scale and enter the minimum percentages for A, B, C and D.

Does this calculate weighted class grades?

No. For categories with different weights, use the Weighted Grade Calculator.

Is this grade calculator free?

Yes. It runs in your browser and requires no sign-up.