Free Test Score Calculator
Convert correct answers into percentage, letter grade, and curved score.
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Inputs
Result
Score
84.00%
Letter grade: B
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Short answer
Percentage = (correct / total) × 100. Add a curve by adding fixed points or scaling the highest score to 100.
What is the Test Score Calculator?
Percentage and letter grade for a test, with an optional flat curve that adds fixed points to every student's raw score.
How does the Test Score Calculator work?
Divide correct by total, multiply by 100, then optionally add the curve.
Formula
Variables
correctQuestions answered correctlytotalTotal questions on the testcurveFlat points added by the instructor
Explanation
Letter grades use the standard US 10-point scale with +/− bands at every 3 points.
Examples
Example 1: 42 out of 50 with a +4 curve
Raw 84% (B), curved 88% (B+).
Applications
- Grading exams
- Comparing quiz results
- Estimating semester impact
Advantages
- Instant letter-grade mapping
- Handles common curve schemes
Limitations
- Assumes equal weight per question and the standard 10-point scale
Common mistakes
- Forgetting to cap curved scores at 100%
Tips
- For weighted questions, compute earned points ÷ total points and use the same formula
Related concepts
The Test Score Calculator sits inside the Math Calculators hub, in the academic & grades cluster. Weighted averages applied to education. Understanding the terms below makes the output easier to interpret and easier to compare against neighbouring measures.
Practical use cases and industry applications
Understanding Test Score
Percentage and letter grade for a test, with an optional flat curve that adds fixed points to every student's raw score. Within math calculators, test score belongs to the academic & grades cluster, where it shares terminology and assumptions with closely related tools.
Learning how test score is calculated
Letter grades use the standard US 10-point scale with +/− bands at every 3 points. Working through the variables one at a time — correct, total, curve — makes the result reproducible by hand and easier to sanity-check.
Using test score to make a decision
Grading exams Comparing quiz results Estimating semester impact Because outputs depend on the assumptions you enter, run more than one scenario before committing to a figure.
How test score compares with related measures
credit hour, weighted mean, grading scale, percentile rank all describe adjacent aspects of academic & grades. Comparing this calculator's output against those measures — using the related tools listed on this page — prevents a single metric from being read in isolation.
Frequently asked questions
What letter is 84%?
On the standard 10-point US scale, 84% is a B.
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