Test Grade Calculator & Easy Grader

Wrong	Grade	%
-0	A	100.0%
-1	A	98.0%
-2	A	96.0%
-3	A	94.0%
-4	A	92.0%
-5	A	90.0%
-6	B	88.0%
-7	B	86.0%
-8	B	84.0%
-9	B	82.0%
-10	B	80.0%
-11	C	78.0%
-12	C	76.0%
-13	C	74.0%
-14	C	72.0%
-15	C	70.0%
-16	D	68.0%
-17	D	66.0%
-18	D	64.0%
-19	D	62.0%
-20	D	60.0%
-21	F	58.0%
-22	F	56.0%
-23	F	54.0%
-24	F	52.0%
-25	F	50.0%
-26	F	48.0%
-27	F	46.0%
-28	F	44.0%
-29	F	42.0%
-30	F	40.0%
-31	F	38.0%
-32	F	36.0%
-33	F	34.0%
-34	F	32.0%
-35	F	30.0%
-36	F	28.0%
-37	F	26.0%
-38	F	24.0%
-39	F	22.0%
-40	F	20.0%
-41	F	18.0%
-42	F	16.0%
-43	F	14.0%
-44	F	12.0%
-45	F	10.0%
-46	F	8.0%
-47	F	6.0%
-48	F	4.0%
-49	F	2.0%
-50	F	0.0%

Easy Grader Chart

Teachers and students often use an "Easy Grader" slide chart to quickly grade papers without doing math for every single student.

How to use: Select the total number of questions on your test from the tabs (e.g., 20 or 50). The chart will show you the exact score for every number of missed questions.

Easy Grader Chart

Select Total Questions:

Incorrect	Score	Letter
-0	100%	A
-1	95%	A
-2	90%	A
-3	85%	B
-4	80%	B
-5	75%	C
-6	70%	C
-7	65%	D
-8	60%	D
-9	55%	F
-10	50%	F
-11	45%	F
-12	40%	F
-13	35%	F
-14	30%	F
-15	25%	F
-16	20%	F
-17	15%	F
-18	10%	F
-19	5%	F
-20	0%	F

What is a Curved Test Grade?

Sometimes a test is so difficult that the entire class performs poorly. In these cases, teachers may "curve" the grades to adjust the distribution. Here are the three most common methods used:

The Flat Curve

The teacher adds the same number of points to everyone's score.

Example

Raw: 70%

+ 10 Points

New: 80%

The 100% Scale

The highest score in the class becomes 100%. The difference is added to everyone.

Example

Top Score: 88%

Gap: 12 pts

Everyone +12

Square Root Curve

Helps lower grades more than higher grades. Formula: √Score × 10.

Example

Raw: 64%

√64 = 8

8 × 10 = 80%

The Basic Formula

Calculating a test score involves a simple percentage formula. You are essentially finding out what "portion" of the test you got right compared to the whole.

Score = (Correct ÷ Total) × 100

Or if counting wrong answers:

Score = ((Total - Wrong) ÷ Total) × 100

Real World Example

Total Questions

Wrong Answers

Final Score:

90%(45 Correct)

Test Grading FAQ

Common questions about calculating test scores and understanding grading scales.

How do I calculate my test grade if it's out of points?

Divide your points earned by the total points possible, then multiply by 100. For example, if you got 45 points out of 60: (45 ÷ 60) × 100 = 75%.

What is a Square Root Curve?

A square root curve helps students with lower grades significantly. The formula is: Square Root of Raw Score multiplied by 10. Example: A raw 64% becomes an 80% (√64 = 8, 8x10 = 80).

If I got 17 out of 20, what is my grade?

17 divided by 20 is 0.85. Multiply by 100 to get 85%. This is typically a 'B' grade.

How much does one test affect my overall grade?

It depends on the weight of the test category in your syllabus. If 'Tests' are worth 50% of your grade and you take 5 tests, each single test is worth 10% of your final grade.

Do teachers round up test grades?

It depends on the teacher's policy. Many teachers round a 0.5 or higher up to the next whole number (e.g., 89.5 becomes 90), but this is not a universal rule.

Test Grade Calculator & Easy Grader

Easy Grader

Test Details

Input Scores

Easy Grader Chart

Easy Grader Chart

What is a Curved Test Grade?

The Flat Curve

The 100% Scale

Square Root Curve

The Basic Formula

Real World Example

Test Grading FAQ

Choose your next calculation