Test Score Calculator

About this Test Score Calculator

Turn right and wrong answers into a percent score, letter grade and GPA, with a full grading chart. It is one of the Work and School on ToolUstad, and like every tool here it runs entirely in your browser: nothing you type, paste or open is uploaded to a server, and there is no sign-up or usage limit.

What a test score calculator does

A test score calculator takes two numbers, the total questions on a test and how many you got right or wrong, and turns them into a percent score, a letter grade and a GPA equivalent. The core maths is simple: correct answers divided by total questions, times 100. A student with 41 right out of 45 has 91.1 percent. What makes a good calculator useful is everything around that one division: the grading scale, the rounding rule, the GPA conversion and the tables that answer the next question, which is usually how many could I miss and still get an A.

Teachers and students use the same tool for different reasons. A student wants to know what a score means after a test. A teacher wants a chart for the whole test before grading, so every possible number of wrong answers already has a grade next to it. Parents use it to translate a percent into a GPA. This calculator covers all three, with four grading scales, editable cut-offs, decimal places, rounding control and weighted sections.

How the percent, grade and GPA are worked out

The percent is correct divided by total, times 100. The letter grade comes from comparing that percent with the cut-offs of the scale you pick. On the standard scale, 90 percent or more is an A, 80 or more is a B, 70 or more is a C, 60 or more is a D and anything below 60 is an F. On the plus-minus scale the bands are narrower: 97 to 100 is A plus, 93 to 96 is A, 90 to 92 is A minus, 87 to 89 is B plus, 83 to 86 is B and 80 to 82 is B minus, and so on down to 60 for D minus. The 7-point scale starts A at 93, B at 85, C at 77 and D at 70. Pass or fail uses a single cut-off, 60 percent by default, which you can change.

GPA points follow the letter: A is 4.0, B is 3.0, C is 2.0, D is 1.0 and F is 0. With plus-minus grades, A minus is 3.7, B plus is 3.3, B minus is 2.7, C plus is 2.3, C minus is 1.7, D plus is 1.3 and D minus is 1.0. A score of 91.1 percent is an A worth 4.0 on the standard scale and an A minus worth 3.7 on the plus-minus scale, which is why the scale you pick matters for GPA.

Learn: how to use the Test Score Calculator

1. Enter the total number of questions or points on the test.
2. Choose whether you know the number right or the number wrong, then enter that number.
3. Pick a grading scale: standard, plus-minus, 7-point or pass or fail.
4. Set the decimal places and the rounding rule, half up or truncate.
5. Adjust the A, B, C and D cut-offs if your teacher uses different ones.
6. Add a target score and a class average to see how far above or below you are.

Features

• Right or wrong entry, so you can start from either number.
• Four grading scales: standard, plus-minus, 7-point and pass or fail.
• Editable grade cut-offs for teachers with their own scale.
• Half-up or truncate rounding, with 0, 1 or 2 decimal places.
• GPA equivalent for every score, from 4.0 down to 0.
• A how many can you miss table for every letter grade.
• A full grading chart for the whole test, up to 60 questions.
• Weighted sections for tests with parts worth different points.
• Partial credit support with decimal points.

Worked example

Frequently asked questions