Marks percentage calculator
Turn marks into a percentage. Edit your score and total, see the fraction and decimal, and check what one extra mark would change.
Result
Example answer72%
18 out of 25 is 72%.
Choose how many decimal places to show.
How we worked it out
18 ÷ 25 = 0.72; (18 ÷ 25) × 100 = 72%
See your score another way
Fraction: 18/25 = 18/25.
Decimal: 0.72.
Marks unearned: 7. With one more mark: 19 out of 25 is 76%.
The one-more-mark comparison assumes each mark is one point. A percentage does not set a letter grade or a pass mark. Use the scale supplied by your course.
Every whole-number score out of 25
Select a score to load it in the calculator. Every mark out of 25 is worth 4 percentage points. This reference stays out of 25 when you edit the calculator.
| Score | Fraction | Decimal | Percentage |
|---|---|---|---|
| 0/1 | 0 | 0% | |
| 1/25 | 0.04 | 4% | |
| 2/25 | 0.08 | 8% | |
| 3/25 | 0.12 | 12% | |
| 4/25 | 0.16 | 16% | |
| 1/5 | 0.2 | 20% | |
| 6/25 | 0.24 | 24% | |
| 7/25 | 0.28 | 28% | |
| 8/25 | 0.32 | 32% | |
| 9/25 | 0.36 | 36% | |
| 2/5 | 0.4 | 40% | |
| 11/25 | 0.44 | 44% | |
| 12/25 | 0.48 | 48% | |
| 13/25 | 0.52 | 52% | |
| 14/25 | 0.56 | 56% | |
| 3/5 | 0.6 | 60% | |
| 16/25 | 0.64 | 64% | |
| 17/25 | 0.68 | 68% | |
| 18/25 | 0.72 | 72% | |
| 19/25 | 0.76 | 76% | |
| 4/5 | 0.8 | 80% | |
| 21/25 | 0.84 | 84% | |
| 22/25 | 0.88 | 88% | |
| 23/25 | 0.92 | 92% | |
| 24/25 | 0.96 | 96% | |
| 1/1 | 1 | 100% |
Worked examples to try
Worked example with the original numbers
How to calculate this answer
Part ÷ total × 100
- 18 ÷ 25 = 0.72
- (18 ÷ 25) × 100 = 72%
Check: (18 ÷ 25) × 25 = 18. Use the unrounded ratio for this check.
A quick way to check it
Divide the marks earned by the maximum marks, then multiply by 100. For a total-points score, add the earned marks and maximum marks before dividing. For separately weighted tests, apply the stated weights. Average test percentages only when the tests carry equal weight.
What the numbers mean
This tool converts a score into a percentage, fraction and decimal. It also shows the effect of one extra point. If your course weights assignments, exams or subjects separately, apply those stated weights instead. Letter grades and pass marks depend on the course rules.
A mistake to avoid
Use the total available as the denominator. A percentage does not determine a letter grade, and separately weighted subjects need their actual weights.
Related calculations to try
Use the percentage calculator for a different type of question, apply one percentage to a list, or compare several percentage rates.
Questions about this example
How do I convert marks to a percentage?
18 out of 25 is 72%. Divide the marks earned by the maximum marks, then multiply by 100. For a total-points score, add the earned marks and maximum marks before dividing. For separately weighted tests, apply the stated weights. Average test percentages only when the tests carry equal weight.
Can I change the numbers?
Yes. Change either input and the answer updates automatically. Reset example brings back the starting numbers. The explanation below the calculator still refers to the original question.
Why might another answer look slightly different?
Decimal settings affect display rounding. A ≈ sign marks a rounded result, and very small values may round to zero. This tool uses ordinary browser arithmetic rather than exact decimal arithmetic. Check the formula and baseline before comparing results.
Read our calculation methodology, report an error, or browse all worked percentage examples.