Grades, Percentages and GPA: A Student's Guide
Turn marks into percentages, percentages into GPA and CGPA, and work out exactly what you need on a final exam — the maths every student should know.
Test Score Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Score
90.00%
- Questions incorrect
- 2
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Test Score Calculator
The Test Score Calculator works out your score, along with 1 related figure in an instant. Enter questions answered correctly and total questions and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the questions answered correctly.
- Enter the total questions.
- Read off your score, together with questions incorrect — the calculator updates automatically, with no button to press.
Formula
The Test Score Calculator uses the formula:
Score = Questions answered correctly ÷ Total questions × 100
Worked example
For example, with questions answered correctly of 18 and total questions of 20, the score is 90.00%.
| Questions answered correctly | 18 |
|---|---|
| Total questions | 20 |
| Score | 90.00% |
|---|---|
| Questions incorrect | 2 |
Results are estimates for educational use, not professional advice.
Frequently asked questions
Divide the number of correct answers by the total questions and multiply by 100. Getting 18 of 20 right is a score of 90%.
Multiply the total by your target as a decimal to see how many you must get right. For 80% of 20 questions you need 16 correct, so you can miss 4.
No. This assumes each correct answer is worth one point and wrong answers score zero. For negative marking, adjust your correct count first.
A test score works from the number of questions right, while a grade percentage usually works from marks awarded. The percentage idea is the same.
Enter the questions answered correctly. Enter the total questions. Read off your score, together with questions incorrect — the calculator updates automatically, with no button to press.
Related guides
Test Score Table: Score by Questions answered correctly
Reference table of score for Test Score across a range of questions answered correctly values — exact, engine-computed figures you can read off at a glance.
How to Calculate Test Score: Formula, Steps & Examples
Learn how to calculate Test Score — the formula explained step by step, with worked examples and a free calculator to check your answer.