Test Accuracy Calculator Formula
Understand the math behind the test accuracy calculator. Each variable explained with a worked example.
Formulas Used
Accuracy Percentage
accuracy = (correct / total) * 100Incorrect Answers
incorrect = total - correctError Rate
error_rate = ((total - correct) / total) * 100Variables
| Variable | Description | Default |
|---|---|---|
correct | Correct Answers | 42 |
total | Total Questions Attempted | 50 |
How It Works
How to Calculate Test Accuracy
Test accuracy is the percentage of questions answered correctly.
Formula
Accuracy = (Correct Answers / Total Questions) x 100
This measures how precisely a student answers questions, focusing on quality rather than completion.
Worked Example
A student answers 42 out of 50 questions correctly.
- 01Accuracy = (42 / 50) x 100 = 84%
- 02Incorrect answers = 50 - 42 = 8
- 03Error rate = (8 / 50) x 100 = 16%
Frequently Asked Questions
What is a good test accuracy?
This depends on the test. For classroom tests, 90%+ is excellent. For standardized tests, accuracy varies by section difficulty.
Is accuracy different from score?
Accuracy focuses on questions attempted. If you skip questions, your accuracy could be high but your overall score lower.
How do I improve test accuracy?
Focus on understanding concepts rather than rushing. Review mistakes, practice similar problems, and manage your time effectively.
Ready to run the numbers?
Open Test Accuracy Calculator