Teachers' Grading Calculator
Online version of the classic EZ Grader Calculator to take the place of grading charts. Enter a question count and max score. This online grade calculator will take care of the rest.
This grading calculator was designed to help teachers quickly build a grade chart without calculating by hand. If you've been doing this a while, it's the same idea as the classic cardboard EZ-Graders that every teacher used to use, and some still do.
Questions is the number of questions in your assignment.
Out of is the final score, and will typically be 100 for a 100% assignment.
Step lets you change the distance between questions. For example, if you want scores in half-question increments, enter 0.5.
Example
You're grading an assignment with 37 questions on a scale from 0–100%. Enter 37 in the questions field, 100 in out of, and a step of 1. Bob, who got 29 out of 37 correct, scored a 78%.
Another assignment also has 37 questions out of 100%, but this time students can get half credit. Bob's neighbor Sue gets 33.5 total questions correct. Changing step from 1 to 0.5 shows that Sue made a 91%.
About this grading calculator
This particular tool started because a way was needed to quickly score AP Computer Science A tests. Free-response questions on the CS A exam are out of 9 points and used to be scored in half-point increments (it's whole points now), and mapping those scores onto 100% by hand got old fast.
To use the AP scoring as an example: questions would be 9, out of would be 100, and step would be 0.5.
Related Calculators
Also see the Linear Grade Distribution and Square Root Curve calculators.