66 out of 100 Test Score

Calculate your grade percentage and letter

What grade is 66 out of 100?

Total number of questions or points possible
Questions or points correctly answered
Questions or points incorrectly answered

66% D

A score of 66 out of 100 on a test, assignment or class is a 66% percentage grade. 34 questions were wrong or points missed.

A 66% is a D letter grade. A letter grade D means less than satisfactory or below average performance. To get the next higher letter grade available, you would need a score of 67 which would be a D+.

The grade point equivalent to a D is a 1.0 GPA for this score.

Letter Grades for 100 question test

Grade Correct Incorrect Percent
A+97 to 1000 to 397.00 to 100.00
A93 to 964 to 793.00 to 96.00
A-90 to 928 to 1090.00 to 92.00
B+87 to 8911 to 1387.00 to 89.00
B83 to 8614 to 1783.00 to 86.00
B-80 to 8218 to 2080.00 to 82.00
C+77 to 7921 to 2377.00 to 79.00
C73 to 7624 to 2773.00 to 76.00
C-70 to 7228 to 3070.00 to 72.00
D+67 to 6931 to 3367.00 to 69.00
D63 to 6634 to 3763.00 to 66.00
D-60 to 6238 to 4060.00 to 62.00
F0 to 5941 to 1000.00 to 59.00

About this calculator

This easy grade calculator can be used for quickly determining the percentage, letter grade and GPA for any test, quiz or exam. It can also be used when calculating an overall score in a class. This page is pre-populated showing the results for the particular calculation 66/100 as a percentage and as a grade. You can access the default calculator here.

To use, input the total number of questions or maximum points available in the "Questions" field. Next either enter the number of correct or incorrect answers in the respective fields. You only need to enter one, the other one will calculate automatically. Your results will appear as you type.

The result will compute the score as a percentage, the letter grade for the score and the GPA for the letter grade. The calculator will also indicate when a score is within one percent of the breakpoint between letter grades where it is appropriate to round up the grade.

Additionally you will see a letter grading scale table which shows every letter grade available for the number of questions on the test. This table indicates the correct and incorrect ranges for each letter grade along with the percentage ranges. Note that on some tests, letter grades are skipped - this is not a mistake. This happens on tests with fewer questions as each question is worth a significant percent of the overall score and significantly moves the letter grade.

FAQ's

How is a percentage calculated for 66 out of 100?

The math is pretty simple to determine the percentage grade on a test as it's simple division and multiplication. The ratio of correct to total number of questions can be expressed as a fraction
correct answers / total questions
The fraction is converted into a decimal using correct answers as the numerator and total questions as the denominator. Divide the correct answers by total questions and you have the answer in decimal form.
correct answers ÷ total questions = decimal
Now to convert into a percent, multiply the decimal times 100. This is your answer.
decimal × 100 = percent answer
In this particular case, the formula for calculating the grade percent 66/100 is
66 ÷ 100 × 100 = 66%
On a 100 question test, if you miss 34 and get 66 right, you will have a 66%.

How is a letter grade determined for 66 out of 100?

To determine the letter grade, we must make use of a letter grade scale lookup table. You can find one here.

Take the percentage calculated for the test and locate the corresponding range in the percent column. The letter grade for that row is the letter grade for this test.

For this score, we find our 66% is in the 63-66% range. This corresponds with the letter grade "D". Thus, a 66% grade is a D.

Change your score

Points earned
-1 +1
Points available
-10 +10