Test Grade Calculator

Created by Luis Hoyos
Last updated: Jul 06, 2022

Welcome to the test grade calculator. With this tool, you'll be able to calculate:

  • The grading scale
  • The letter grade;
  • The Grade percentage; and
  • The number of questions and wrong and correct answers, given two of them.

Additionally, if you click on the advanced mode, you can change your grading scale and create your custom scale.

Your grades obtained can influence your academic future and open the possibility of winning a scholarship instead of taking a student loan. For this reason, we've created this calculator.

As we'll see in the next section, to calculate exam percentages, we'll 'just need a simple formula and not a quadratic formula, quantum mechanics, or any other complicated stuff.

How to calculate grade the percentage

The formula to calculate a test grade percentage is simple. It only requires dividing the number of correct answers ✔️ by the total number of questions ❔

grade percentage = #correct / #total

As #correct + #wrong = #total, we can write the equation also as:

percentage score = (#total - #wrong) / #total

🙋 The previous formulas give the grade percentage as a fraction. To convert it to a pure percentage, multiply it by 100%. For example, if you obtained 20 right answers out of 25, the grade percentage equals a 20/25 = 0.8 in fraction percentage, and 100% × 0.8 = 80% (eighty percent) in percentage notation.

With the grade percentage, we can calculate the exam grade letter, as we'll see in the following section.

The grading scale used by this test grade calculator

By default, this test grade calculator uses this standard grading scale:

Letter Grade

Percentage (%)

A+

97-100

A

93-96

A-

90-92

B+

87-89

B

83-86

B-

80-82

C+

77-79

C

73-76

C-

70-72

D+

67-69

D

63-66

D-

60-62

F

Below 60

Some schools don't use "+/-", but this grading scale:

Letter Grade

Percentage (%)

A

90-100

B

80-89

C

70-79

D

60-69

E/F

Below 60

The above tables represent the standard grading system for US schools and universities. However, the system may vary among schools, classes, and teachers. In that case, you can use the advanced mode of this calculator to configure your custom grade scale. Always check beforehand which system applies in your case.

Luis Hoyos
# Points / Questions ❔
# Wrong ❌
# Correct ✔️
Percentage
%
Grade
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