GPACalculator

Easy Grader for Teachers

The teacher's quick-grading chart: number of questions and wrong answers in, percentage out.

Quick answer: Enter the number of questions and how many were wrong and the easy grader returns the percentage and letter grade instantly — plus a full wrong-count chart for the whole test, which is exactly how a paper grading wheel works.

The teacher's quick-grader shortcut: enter how many questions the test had and how many were missed, and read the percentage and letter grade instantly. Nothing is uploaded and no account is needed.

Score
84%
Letter grade
B
Correct
21 of 25
Points lost
4
Grading chart for 25 questions
0 wrong1 wrong2 wrong3 wrong4 wrong5 wrong6 wrong7 wrong8 wrong9 wrong10 wrong11 wrong12 wrong
100%96%92%88%84%80%76%72%68%64%60%56%52%
A+AA-B+BB-CC-D+DD-FF
Core facts
Price100% free, no sign-up
InputQuestions, wrong answers (or points earned/possible)
OutputPercentage, letter grade, full grading chart
ProcessingRuns locally in your browser

What is Easy Grader?

An easy grader is the digital version of the paper grading wheel teachers keep on their desks: line up the number of questions, read off the percentage for each number wrong. This one also returns the letter grade on the standard scale and prints a chart covering every wrong count for the test you are marking, so a whole stack of papers can be graded without a calculator. A second mode converts any points-earned out of points-possible into a percentage, for assignments that are not scored by question count.

Common Uses for Easy Grader

  • Grade a stack of quizzes with a fixed number of questions
  • Mark a test out of 25, 40 or 50 without mental arithmetic
  • Convert a points-based assignment into a percentage
  • Post a grading chart so students can check their own scores

Why the chart matters more than the single score

Marking one paper is a single division; marking thirty is where errors creep in. The chart gives you the percentage for every possible wrong count at once, so you glance once per paper instead of recalculating. Print it, or keep it open on a second screen while marking.

Scoring conventions to decide first

Decide before you start whether blank answers count as wrong, whether partial credit is possible, and whether the class is graded on a fixed percentage scale or a curve. Each of those changes the number the calculator produces, and deciding afterwards means recalculating the whole stack.

Frequently Asked Questions

Does it round?
The percentage is rounded to one decimal place for display and the letter grade is taken from the unrounded value, so a 89.95% reads as 90.0% and A- rather than being pushed down by display rounding.
Can I grade an exam out of 100?
Yes — set the question count to 100 and each wrong answer is one percentage point. For exams out of 75 or 120, enter that number and the chart recalibrates.
What curve should I use?
That is a policy decision, not a maths one. The grade curve calculator models flat curves, square-root curves and recovering a set share of the gap to 100, so you can see the effect on a borderline class before committing to it.
Does it store anything?
No. Everything is computed in your browser as you type; nothing is uploaded and there is no account or history.

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