Easy Grader Calculator

The cardboard slider, without the cardboard

This is the classroom EZ-Grader rebuilt for a browser: type the number of questions on the test, and the full chart appears — every possible wrong-answer count with the matching score and letter grade. Type a student’s wrong count on top and the matching row lights up, so you can grade a stack of quizzes without touching a calculator.

The math is one line: score = (total − wrong) ÷ total × 100. For a 25-question quiz each miss costs 4 points; for a 50-question test, 2 points. The chart does that division 200 ways so you don’t have to.

Pick the scale your syllabus actually uses

Letter grades aren’t universal — the same 75% is a C on one campus and a D+ on another. The scale selector covers the three families teachers actually meet:

Scale	A starts	Passing	Where you’ll see it
Standard (10-pt)	90%	60%	Most US schools; the default
Strict (7-pt)	93%	70%	Stricter districts, some magnet programs
Lenient	85%	50%	Standards-based and generous systems

The letter grade scales page prints every threshold, including the +/− rungs. Percentages are rounded to one decimal before the letter is picked, so the number on screen is always the number that was graded.

Half-points, GPA and the printed page

Tick half-point deductions for questions scored in halves (partial credit, two-part items): the chart doubles to one row per half point and the lookup accepts values like 7.5. The GPA column adds the standard unweighted 4.0 points next to each letter (A/A+ = 4.0, B = 3.0, F = 0) — handy when the gradebook wants points, not letters.

The chart is built to be printed: Print chart produces a clean one-column table with the question count and scale labeled at the top — the modern equivalent of the cardboard slide chart taped to the desk. Download CSV drops the same table into a spreadsheet for record-keeping or mail-merge grade slips.

More for teachers

• Letter grade scales explained — where A–F came from, why there’s no E, and every threshold on all three scales.
• How to curve a test fairly — five curving methods with the math worked out, and which ones to avoid.
• Weighted grading vs points — what “tests are 40% of the grade” does to the math, with worked examples.

Frequently asked questions

What grade is 7 out of 10?

7 right out of 10 is 70%. On the standard scale that's a C-; on the strict 7-point scale it's a D-; on the lenient scale it's a C. The letter depends on the scale your school uses — switch scales above to compare.

How do I grade questions worth half a point?

Tick the half-point deductions box. The wrong-answer input then accepts .5 values (like 3.5 for three fully wrong plus two half deductions), and the chart doubles its rows so every half-step gets its own line.

Which grading scale should I use?

Whatever your syllabus says — the scale is a policy, not a fact. Standard (A starts at 90, pass at 60) is the most common in US schools. Strict (A at 93, pass at 70) is the older 7-point scale some districts still use. Lenient (A at 85, pass at 50) fits standards-based or generous systems. All three are printed side by side on the letter grade scales page.

Is there a maximum number of questions?

The chart goes up to 200 questions — far past a typical quiz. Longer exams (like a 400-question practice test) are best graded per section anyway, since students usually need a score per section.

How do I get a physical copy for my desk?

Set the question count and options, then click Print chart. The printout leaves out the navigation, buttons and score card, so the table and its scale label print cleanly with the page text. Download CSV saves the same table for a spreadsheet or gradebook.

Does this site store my students' scores?

No. The numbers you type are worked out in your browser — no accounts, no uploads, nothing you enter is sent or saved. You can load the page, go offline, and keep grading.