EZ Grader (Grade Calculator for Teachers)

Enter the number of questions and how many were wrong to get the percent score and the letter grade at once, along with a full grading chart for every possible number wrong. Use it while marking tests to convert results quickly.

How to use

1. Enter the "Number of questions" (1 to 200) and choose "Number wrong" or "Number right" under "Enter".
2. Type the count, or change it with the "+1" and "−1" buttons or the arrow keys ↑ ↓. The score and grade update at once.
3. Open "Grade scale" to pick a scale under "Start from", or edit the grade names and lowest percents yourself.
4. Print the "Grading chart", or paste each student's count under "Grade a whole class" to see a list of scores and the class average.

How it works

• Percent = number right ÷ number of questions × 100. Each question is worth 100 ÷ the number of questions, and "Rounding" sets whole numbers, decimal places, rounding down or rounding up.
• "Allow half points (0.5)" lets you count in half steps, such as 2.5 wrong.
• The default scale is A 90, B 80, C 70, D 60 and F below. You can also choose "A–F with + and −", "A–E (90/80/70/60)" or no grades. Your scale is saved on this device.

Questions and answers

What percent is 3 wrong out of 20?

17 right ÷ 20 × 100 = 85%. On a 20-question test each question is worth 5%.

How much is each question worth on a 25-question test?

100 ÷ 25 = 4%. One wrong gives 96%, and three wrong give 88%.

What happens when the percent is not a whole number?

For example, 1 wrong out of 30 is 96.666…%. Depending on "Rounding", it is shown as 97%, 96.7% or 96%.

Can I grade a whole class at once?

Yes. Under "Grade a whole class", type one count per line or paste a spreadsheet column. Each student's score appears, with the average, highest and lowest scores.