# Grade Percentage to Letter Grade & GPA Calculator

> Instantly convert any percentage score to a letter grade (A, B+, C…) and GPA points. Supports standard and plus-minus scales. Free, no sign-up.

- **Category:** Education & Grades
- **Interactive calculator:** https://youcalc.com/en/education-grades/grade-percentage-letter/
- **Price:** Free, no sign-up required

## Overview

This calculator converts a raw percentage score into a letter grade and GPA points. Enter any score from 0 to 100, choose a grading scale, and the result updates instantly. The letter-grade cutoffs shown (A = 90–100, B = 80–89, etc.) follow a common US convention; actual thresholds vary by institution.

## How to read your result

The large letter in the result card is your grade on the chosen scale. Below it, the GPA points show the corresponding 4.0-scale value. The grade-scale reference table beneath the gauge highlights the active row so you can see exactly where your score sits relative to every other band.

## Method

The calculation iterates through an ordered list of grade bands and returns the first band whose minimum and maximum percentage bounds (inclusive) contain the input score. The standard scale uses five bands (A, B, C, D, F) and assigns GPA points of 4.0, 3.0, 2.0, 1.0, and 0.0 respectively. The plus-minus scale uses thirteen bands (A+ through F) with GPA points drawn from the widely published US 4.0 system (source: back2college.com and calculator.net). Input is validated with Zod to reject values outside 0–100 before any lookup is performed.

## Example

- **Setup:** A student scores 88 on an exam and wants to know the grade under the plus-minus scale.
- **Result:** A score of 88 falls in the B+ band (87–89%) and earns 3.3 GPA points on the plus-minus scale.

## Frequently asked questions

### What is the difference between the standard and plus-minus scales?

The standard scale uses five broad bands: A (90–100), B (80–89), C (70–79), D (60–69), and F (0–59). The plus-minus scale splits most bands into three sub-grades — for example B+ (87–89), B (83–86), and B- (80–82) — giving more granular GPA credit such as 3.3, 3.0, and 2.7.

### Does every school use these exact cutoffs?

No. These ranges represent a widely taught US convention (back2college.com, calculator.net), but many institutions set their own thresholds — for example some treat 93 as the A/A- boundary or start the D band at 55. Always check your course syllabus for the official scale.

### What GPA points does an A+ earn?

Under the plus-minus scale, A+ covers 97–100% and is assigned 4.0 GPA points — the same as a plain A — because most universities cap the 4.0 scale at 4.0 and do not award 4.3 for A+.

### Can I use a custom grading scale?

The calculator exposes a custom bands option in code (the optional third argument to percentToGrade). The built-in UI offers the two most common US scales; if your school uses a different scheme, enter your percentage and map it against your syllabus manually.

### How do I convert a score to a percentage if I only have raw points?

Divide your earned points by the total possible points and multiply by 100. For example, 42 out of 50 is (42 / 50) × 100 = 84%. Enter that percentage here to get the letter grade.

## Related calculators

- [Test Grade Calculator](https://youcalc.com/en/education-grades/test-grade-calculator/)
- [GPA Calculator](https://youcalc.com/en/education-grades/gpa-weighted-grade/)
- [CGPA to Percentage Calculator](https://youcalc.com/en/education-grades/cgpa-to-percentage/)
- [Cumulative GPA Calculator](https://youcalc.com/en/education-grades/cumulative-gpa-calculator/)

## Sources

- https://www.back2college.com/gpa.htm
- https://www.calculator.net/gpa-calculator.html

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Interactive version: https://youcalc.com/en/education-grades/grade-percentage-letter/ · From YouCalc — https://youcalc.com