How is the percentage score calculated?

The percentage score is calculated as (correct answers / total questions) × 100, formatted to two decimal places. For example, 18 correct out of 25 total yields (18 / 25) × 100 = 72.00%.

Can I enter missed questions instead of correct questions?

Yes. Entering missed/wrong questions automatically derives correct answers (correct = total − wrong) without manual subtraction.

Can I enter decimal point values?

Yes. Both questions and point values accept finite decimals (such as 42.5 earned out of 50 total possible points).

What letter grade scale does this use?

The default scale is A ≥ 90%, B ≥ 80%, C ≥ 70%, D ≥ 60%, and F < 60%. Thresholds can be adjusted directly in the Grade Scale section, provided they remain in strictly descending order between 100 and 0.

Is student data sent to an external server?

No. All calculations execute entirely in the client browser with no network transmission.

Test Score Calculator

Enter total questions and either correct answers or missed questions to calculate percentage score, letter grade, and grade thresholds instantly.

Test Details

Total Questions / Points

Correct / Earned

Wrong / Missed

Grade Scale Cutoffs

Scale requirement: 100 ≥ A > B > C > D ≥ 0 (below D is F).

A %+

B %+

C %+

D %+

Unit Relationships & Scope:

• Total = Correct (earned) + Wrong (missed).

• Score % = (Correct / Total) × 100.

• Single-assessment direct grader. Does not calculate curves, weighted categories, or institution-specific GPA honor points.

Enter total questions and either correct or missed answers to view your test grade.

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Summary

Enter total questions and either correct answers or missed questions to calculate percentage score, letter grade, and grade thresholds instantly.

How it works

Enter the total number of questions or total possible points on the exam.
Enter either the number of correct answers (points earned) or missed questions (points lost). The opposite field synchronizes automatically.
View the percentage score, letter grade, and threshold targets in real time.
Customize the A, B, C, and D scale cutoffs to match your institution grading policy.

Use cases

Grade papers quickly by typing missed questions marked in red ink.
Convert points earned on an exam into a percentage and letter grade.
Calculate how many questions can be missed while maintaining a target grade cutoff.
Verify test grading accuracy when reviewing returned exams.

Frequently Asked Questions

Last updated: 2026-09-22 · Reviewed by Nham Vu