Test Score Calculator
Turn correct answers out of total questions into a percentage and letter grade in one step.
How it works
score % = correct ÷ total × 100
The percentage is simply the share of questions answered correctly. The letter grade uses the simple 10-point scale many US classrooms grade tests on: 90+ is an A, 80–89 a B, 70–79 a C, 60–69 a D, and below 60 an F. Teachers who use plus/minus bands or curves will map the same percentage differently.
Worked example
42 correct out of 50: 42 ÷ 50 × 100 = 84.0% — a B, with 8 wrong answers at 2 points each.
Frequently asked questions
How many can I miss and still get an A?
On the 90% line you can miss up to 10% of the questions: 5 on a 50-question test, 10 on a 100-question test. One more miss drops you to a B.
What about partial credit?
Enter points instead of questions — points earned as "correct" and points possible as "total". The math is identical.
Does this match my teacher’s grading scale?
Only if they use straight 10-point bands. Many schools add plus/minus cutoffs (the letter grade calculator covers those) or curve scores against the class average.
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This calculator is for educational purposes. Double-check important results before acting on them.