Try our newly designed
Quick Grade
Enter the number of questions on the test and see every possible score and letter grade — from 0 wrong to all wrong — in one chart.
Minimum percentage for each letter
F is anything below the D minimum. The chart recalculates as you type.
Quick chart
How to use the Quick Grade calculator
Enter the total number of questions on the test, and the quick chart instantly fills in with every possible score — from 0 wrong up to all wrong — along with its percentage and letter grade.
Print the chart to keep beside you while you grade a stack of tests: just find the row for how many a student missed and read off the grade.
The grading formula
A test grade is the share of questions answered correctly: grade = (correct answers ÷ total questions) × 100. A student who gets 18 out of 20 questions right scores (18 ÷ 20) × 100 = 90% — an A on the default scale.
Letter grades follow the scale you set: by default A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, and F below 60.
Frequently asked questions
What is a quick grade calculator?
It is a digital replacement for the classic EZ-grader slide chart. Instead of sliding a cardboard wheel, you enter the number of questions, and the tool shows a full chart of the percentage score and letter grade for every possible number wrong.
Can I change the grading scale?
Yes. Click the Grade scale button and set the minimum percentage for each letter. The default is A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60. Every row in the chart recalculates as you type, and your custom scale is remembered on your device.
Does it show decimal scores?
Yes — turn on "Show decimals" to see every row's percentage to one decimal place, like 87.5%, instead of rounded to a whole number.
Is Quick Grade free?
Completely free, with no sign-up. Everything runs in your browser, works offline after the first load, and nothing you enter leaves your device.