Result updated. Percentage score: 90.0%.
Result summary
Test score
Main result from the study details entered.
90.0%
This is a correct-out-of-total calculation using whole question counts.
Key numbers
- Questions correct
- 18
- Incorrect
- 2
Extra-credit results keep this at 0 instead of a negative number.
Key takeaway
18 out of 20 is 90.0%, with 2 incorrect.
Score details
Question counts, incorrect count and optional letter-grade mapping.
- Questions correct
- 18
- Incorrect
- 2
- Total questions
- 20
Extra-credit results keep this at 0 instead of a negative number.
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How this test score calculator works
The calculator divides questions correct by total questions, then multiplies by 100. Question counts must be whole numbers, and total questions must be greater than 0.
Optional letter-grade scale
Letter grades are optional because grade boundaries vary. If you turn them on, the result uses only the threshold scale shown in the tool.
What this tool does not include
This tool does not grade answer keys, scan tests, apply curves or decide pass marks. Grading systems vary by school and class.
Key terms and assumptionsShort notes about question counts, extra credit, letter-grade scales and school-specific rules.
- Question-count formula
- The calculator divides questions correct by total questions and multiplies by 100.
- Whole numbers
- Question counts must be whole numbers. Use the Grade Percentage Calculator for points and partial credit.
- Total questions
- Total questions must be greater than 0 because a percentage cannot be calculated from a zero total.
- Letter grades
- Optional letter grades use the editable thresholds in the tool and are not official school rules.
- School rules vary
- This tool does not apply curves, dropped questions, official pass marks or school-specific grading systems.
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FAQs
How do I calculate a test percentage?
Divide questions correct by total questions, then multiply by 100.
Can total questions be 0?
No. A percentage score cannot be calculated when the total is 0.
Can questions correct be 0?
Yes. That returns a 0% score when total questions is greater than 0.
What if there is extra credit?
Extra-credit mode can allow correct answers above the total, and the result is labelled as based on entered assumptions.
Does this show a letter grade?
It can if the optional grade scale is enabled. Letter grades vary by class and school.
Does it handle partial credit?
Not directly. Use the Grade Percentage Calculator when you have points earned and total points.
Can I copy the score?
Yes. The copy summary includes the percentage, correct count and incorrect count.