# Free online grade calculator

> A grade calculator converts raw scores into a letter grade and GPA. Enter each assignment's points and optional weight to get your weighted average.

Calculate your overall grade percentage, letter grade, and GPA from assignment scores. Supports weighted averages and plus/minus grading scales.

**Interactive version:** https://onlinecalculator.me/math/grade/
**Category:** Math

## How to use

1. Enter each assignment name, points earned, maximum points, and weight (or leave weight at 0 for equal weighting).
2. Add more assignments with the **+ Add assignment** button.
3. Choose **Plus / Minus** or **Standard** grading scale.
4. Click **Calculate Grade**.
5. See your percentage, letter grade, and GPA, plus a breakdown by assignment.

## Formulas

**Equal weight (all weights = 0):**

Percentage = (Sum of points earned) ÷ (Sum of max points) × 100

**Weighted average:**

Percentage = Σ (assignment% × weight) ÷ Σ weight

## Worked example

| Assignment | Points | Max | Weight |
|------------|--------|-----|--------|
| Midterm | 85 | 100 | 40% |
| Final | 90 | 100 | 60% |

Weighted grade = (85 × 0.40) + (90 × 0.60) = 34 + 54 = **88%** → **B+** → GPA **3.3**

## Frequently asked questions

### How is a weighted grade calculated?

Multiply each assignment's percentage by its weight, sum the results, and divide by the total weight. For example, a midterm worth 40% at 85% and a final worth 60% at 90% gives 0.40×85 + 0.60×90 = 34 + 54 = 88%.

### What if I leave all weights at zero?

When all weights are zero, the calculator treats each assignment equally — it averages the percentages directly. This matches a simple points-based grading system.

### What are the letter grade cutoffs?

Plus/minus scale: A+ ≥ 97, A ≥ 93, A- ≥ 90, B+ ≥ 87, B ≥ 83, B- ≥ 80, C+ ≥ 77, C ≥ 73, C- ≥ 70, D+ ≥ 67, D ≥ 63, D- ≥ 60, F < 60. Standard scale: A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, F < 60.

### How is GPA calculated from a letter grade?

Standard GPA scale: A/A+ = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, C+ = 2.3, C = 2.0, C- = 1.7, D+ = 1.3, D = 1.0, D- = 0.7, F = 0.0.

### What is a passing grade?

Most US schools consider 60% (D-) passing for credit, though some courses require a C or higher. The calculator marks 60% and above as pass, below 60% as fail.

## Sources

- [Weighted arithmetic mean](https://en.wikipedia.org/wiki/Weighted_arithmetic_mean) — Wikipedia
- [Academic grading in the United States](https://en.wikipedia.org/wiki/Academic_grading_in_the_United_States) — Wikipedia

## Related calculators

- [Percentage calculator](https://onlinecalculator.me/math/percentage/) — Calculate percentage of a number or percentage change.
- [Standard deviation calculator](https://onlinecalculator.me/math/standard-deviation/) — Calculate mean, variance, and standard deviation.
- [Average calculator](https://onlinecalculator.me/math/average/) — Calculate the mean of a list of numbers.
- [GPA calculator](https://onlinecalculator.me/math/gpa/) — Calculate cumulative GPA across multiple courses.

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