PercentLab

Test Score Calculator

Calculate your test score percentage and letter grade. Enter points earned and total points for instant grade calculation.

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Formula

Percentage = (Points Earned / Total Points) × 100

Example

points Earned:42
total Points:50
percentage:84
grade:B

Frequently Asked Questions

Divide the points you earned by the total points possible, then multiply by 100. For example, if you scored 42 out of 50: (42 / 50) × 100 = 84%.

Standard grading scale: A (90-100%), B (80-89%), C (70-79%), D (60-69%), F (below 60%). Some schools use different scales or plus/minus grades.

To get 90% (A grade), you can miss 10% of questions. On a 50-question test: 50 × 0.10 = 5 questions. You can miss up to 5 questions and still get an A.

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Want to improve your percentage skills?

Visit our Learning Hub for tutorials and in-depth guides on percentage calculations.

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Last updated: 2025-11-13