Test Grade Calculator

How to use

1. 1Pick a mode at the top: Number correct / wrong for an equal-weight test, or Points earned / total for a weighted exam.
2. 2In Number correct / wrong mode, enter the total questions and how many were missed. Use the -1 and +1 buttons to scrub the wrong count and watch the grade update.
3. 3In Points earned / total mode, enter the maximum points and the points earned. The percentage and letter update instantly.
4. 4Pick a grade scale (Standard +/-, Whole letter, College standard, AP 1 - 5, or Pass / Fail), or choose Custom scale and edit the cutoffs to match your syllabus.
5. 5Read the headline letter grade and percentage, then scroll to the grade table for every possible score. Use Copy result for the headline or Copy CSV for the full table.

About this tool

Test Grade Calculator turns a raw test score into a percentage and a letter grade, then prints a full grade table for every possible score on a test of that length. Pick a mode at the top: Number correct / wrong takes a total question count and the number missed, then computes percentage = correct / total x 100 and reads the letter from the selected grade scale; Points earned / total takes the maximum points and the points earned, which is the right mode for weighted exams where each question is worth a different number of points. Five preset grade scales cover the most-asked variants: Standard +/- (A+ 97, A 93, A- 90, B+ 87, ... D- 60, F under 60), Whole letter (A 90, B 80, C 70, D 60, F), College standard (A 93, A- 90, ... D- 60, no A+), AP 1 - 5 (5 80+, 4 65+, 3 50+, 2 35+, 1 under 35), and Pass / Fail at 60%. A Custom Scale editor lets a teacher or student enter their own cutoffs row by row so a syllabus that uses, say, 94 / 88 / 82 / 76 / 70 boundaries can be matched exactly. The result panel shows the letter grade as a colored chip, the percentage, the correct / total split, the wrong count, and an unrounded percentage when rounding changes the number. The grade table below the result lists every possible score from the total down to zero, with its percentage and letter grade, so you can answer the question students actually ask (how many can I miss and still get a B+) at a glance, and a one-click Copy CSV button puts the table on the clipboard ready to paste into a spreadsheet or print next to a stack of exams. A wrong-count stepper lets a teacher scrub up and down through the totals while the result updates in real time, which is faster than re-typing the input. Rounding defaults to Round to nearest (most US schools); switch to Round down (floor) if a course syllabus specifies floor rounding. Useful for teachers grading quizzes and exams, students checking their own score, parents helping with homework, tutors converting raw scores into the scale a school uses, and anyone who has ever asked how many can I miss and still get an A. Inputs are not uploaded; all math runs locally in your browser.

Free to use. Works in your browser. No signup, no login.