# Test Grade Calculator

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**.