A basic test percentage is points earned divided by points available. Weighted sections require one extra step because not every point contributes equally.
Calculate a simple score
If you earned 42 points out of 50, calculate 42 ÷ 50 × 100. The score is 84%.
Account for partial credit
Add all awarded points, including fractions, before dividing by the total available. For 37.5 out of 45, the result is approximately 83.33%.
Understand weighted categories
Convert each category to a percentage, multiply by its weight, then add the weighted results. A category worth 40% contributes 0.40 times its category score to the final grade.
Separate calculation from grading policy
The same percentage may correspond to different letter grades or outcomes across schools and courses. Use the official grading scale for interpretation.
A calculator is often the quickest way to check your mental math. The important part is using the right starting value.
Open a calculator →Common questions
What is 18 out of 24?
18 ÷ 24 × 100 = 75%.
Do bonus points allow more than 100%?
Yes, if the grading policy permits earned points to exceed the standard total.
Can I average course percentages directly?
Only if the assessments have equal weight; otherwise use points or assigned weights.
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