Grade Calculator

Enter your score and the total possible score to calculate a grade percentage instantly.

How to use this grade calculator

Enter assignment names and weights
Add each assignment and its weight as a percentage of the total grade.
Enter your scores for each
Input the score you earned for each assignment.
Review your weighted average grade
See the weighted average across all assignments displayed.
Adjust scores to see grade impact
Change any score to see how it affects your overall grade.

Methodology

How this grade calculator works

This page uses the same percentage-grade method as the dedicated test grade calculator, but frames it around the broader grade-calculator query. It is useful when you want a fast answer from a raw score without committing to a more complex gradebook or weighted-course workflow.

Formula

grade % = (earned score ÷ total possible score) × 100

points earned The score you achieved on the test

points possible The maximum score available on the test

Example

If you earned 18 points out of 20, the grade is 90%.

A student has three weighted categories: homework worth 30% of the final grade with a score of 92, a midterm worth 30% with a score of 78, and a final project worth 40% with a score of 85. The weighted average is (0.30 × 92) + (0.30 × 78) + (0.40 × 85) = 27.6 + 23.4 + 34.0 = 85.0%, which maps to a B under a standard letter-grade scale.

Suppose the same student wants to know what final-project score would push the overall grade to 90%. Rearranging: needed = (90 − 27.6 − 23.4) ÷ 0.40 = 97.5%. That means the student needs a 97.5 on the final project to reach an A, which is ambitious but not impossible.

Assumptions

✓ Each point contributes equally to the final percentage.
✓ The letter-grade estimate uses a simple A-to-F threshold model rather than school-specific grading rules.
✓ The result does not include weighted assignments, curves, or attendance adjustments.

Notes

This is best for a quick raw-score check rather than a full class-grade calculation.
If the grade depends on assignment weights, use a final-grade style calculator instead.
The same method works for quizzes, tests, homework totals, and rubric point sheets.

Sources

Basic percentage arithmetic used in education and grading systems

How weighted grades work

Weighted grading assigns each assignment category a share of the total grade, usually expressed as a percentage that should sum to 100%. Common splits include homework, quizzes, midterms, projects, and a final exam. To compute a weighted average, multiply each category score by its weight expressed as a decimal, then sum the products. For example, if homework is worth 20% and you scored 88, the contribution is 0.20 × 88 = 17.6 grade points. The key rule is that all category weights must add up to 100% (or 1.0 in decimal form) for the result to represent a true overall grade. If they do not sum to 100%, the average will be scaled incorrectly — a common mistake when syllabi list weights that accidentally total 95% or 105%. Always verify the weights add up before relying on the result for planning.

Improving your grade

Not all assignments affect your final grade equally, and understanding which ones carry the most weight is the key to efficient study planning. A category that represents 40% of the course grade has twice the leverage of one worth 20%, so a 5-point improvement in the heavier category moves the overall average more than the same improvement in the lighter one. When time is limited, prioritise the assignments with the largest remaining weight. Another useful technique is what-if analysis: plug hypothetical scores into the weighted formula to see exactly what you need on upcoming work to reach a target grade. If you discover that reaching an A requires a near-perfect score on every remaining assignment, you can make an informed decision about whether to aim for that or to allocate study time across all your classes more evenly. Grade calculators automate this arithmetic so you can focus on strategy rather than manual number crunching.