Test Score Calculator
Turn points earned into a percentage and letter grade.
Results update as you type.
How it works
A test score calculator converts the raw points you earned on a quiz, test or exam into the percentage and letter grade that actually appear on your record. You enter how many points you got and how many were available, and it divides one by the other, multiplies by 100, and maps the result onto a common United States letter scale. It removes the mental arithmetic of working out, say, that 42 out of 50 is 84 percent and a solid B, and it does so instantly and without error. The percentage is the universal language of grades because it strips away the size of the test: a score out of 50, out of 80 or out of 200 all become comparable once expressed as a percentage of the total. That is what lets you line up performance across assessments of different lengths and see genuine progress. The letter grade layered on top follows the widely used bands where 90 and above is an A, the 80s a B, the 70s a C, the 60s a D and anything below a fail. Students use a test score calculator the moment a paper comes back to translate a point tally into something meaningful, to double check a teacher's marking, and to track results over a term. Teachers use it to grade stacks of papers consistently, and tutors use it to show learners exactly where a score sits.
percentage = (points earned ÷ points possible) × 100
Dividing points earned by points possible expresses your result as a fraction of the maximum, and multiplying by 100 rescales that fraction into a percentage everyone recognises. The percentage is independent of the test's size, so a 42-out-of-50 and an 84-out-of-100 both read as 84 percent and are directly comparable. The letter grade then comes from fixed cutoffs — 90, 80, 70 and 60 percent — that sort the continuous percentage into the familiar A through F bands used across most US schools.
Source:Standard percentage grading (US letter scale)
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter points earned and total points possible.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Score updates instantly as you type — no button to press.
Frequently asked questions
What letter-grade scale does this use?
It applies the common United States scale: 90 percent and above is an A, 80 to 89 is a B, 70 to 79 is a C, 60 to 69 is a D, and anything below 60 is an F. Many schools add plus and minus bands or set slightly different cutoffs, and some use rounding rules of their own. Always check your school's official grading policy, because the letter here is a widely used default rather than a universal standard.
Can the percentage go above 100?
Yes, if you earned bonus or extra-credit points beyond the standard total. For example, scoring 55 on a test worth 50 gives 110 percent. The calculator reports whatever the division produces, so a figure above 100 simply reflects extra credit. If you did not attempt any bonus questions and still see a number over 100, double check that you entered points earned and points possible in the correct fields rather than reversing them.
What if my test used half points or decimals?
Enter them exactly as they are. The calculator accepts decimal values in both fields, so a score of 42.5 out of 50 works perfectly and returns 85 percent. Partial-credit marking is common in maths, science and essay questions, and the percentage handles it without any special steps. Just type the precise points earned, including any half or quarter marks, and the total possible, and the result reflects your marking to the decimal.
How do I combine several test scores into one grade?
If the tests carry different weights, use a weighted grade calculator and enter each test's percentage with its weight. If every test counts equally, you can average the percentages directly, or add up all points earned across the tests and divide by all points possible for a points-based average. The two approaches can differ slightly when tests have different totals, so pick the method your course actually uses.
Is a percentage the same as a percentile?
No, and the distinction matters. A percentage is the share of available points you earned on the test itself — 84 percent means 84 of every 100 points. A percentile compares you against other test takers, so the 84th percentile means you scored higher than 84 percent of them. This calculator produces a percentage of points, not a percentile ranking, which would require the full distribution of everyone's scores to compute.