Test Grade Calculator

Turn an answer count into a grade

Enter whole-number counts for correct answers and total questions, then select Calculate test grade. The result shows the percentage, incorrect-answer count, and a clearly labeled common A–F interpretation.

How the percentage is calculated

Divide correct answers by total questions and multiply by 100. The calculator displays two decimal places so small tests do not lose useful detail. Incorrect answers equal total questions minus correct answers. This model assumes every question has equal value and awards no partial credit.

Worked example

With 18 correct answers out of 20, 18 ÷ 20 × 100 equals 90%. Two answers are incorrect. Under the displayed common scale, 90% maps to A. A school using an A-minus band or another cutoff may label that same percentage differently.

About the letter grade

The letter is a convenience, not an official determination. This page uses A for 90% or more, B for 80% through 89.99%, C for 70% through 79.99%, D for 60% through 69.99%, and F below 60%. It does not assign plus or minus grades. Always use the instructor's syllabus or grading policy when it differs.

Equal-weight assumption

A correct-answer count works only when each item contributes the same number of points. If an essay is worth 20 points and a multiple-choice item is worth one, add earned points and possible points instead of counting questions. Curves, dropped items, penalties, extra credit, and rubric categories also require the instructor's actual rules.

Limits and rounding

Inputs must be whole numbers, total questions must be at least one, and correct answers cannot exceed the total. The percentage is calculated before display rounding, while the letter band uses the unrounded value. This result estimates one assessment and does not calculate its weight in an overall course grade.

Using the result well

Check whether unanswered questions count as incorrect before entering the totals. When reviewing performance, look beyond the letter: note which topics caused missed answers and whether errors came from knowledge, reading, or time pressure. Keep official gradebook values as the source of record.

Test Grade FAQ

Can correct answers include a decimal?

No. This narrow calculator accepts whole questions; use earned points for partial credit.

Does 89.5% round to an A?

Not here. The common scale uses the calculated percentage without promotion by display rounding.

Does this update my course grade?

No. It calculates one equal-weight test score only.