Grade Percentage Calculator

Points earned ÷ points possible × 100 is your grade, and this grade percentage calculator adds the letter on a scale you can change to your school's.

Last verified Oct 19, 2026
Method: points earned ÷ points possible × 100 · Example: Sakai's gradebook help · Example default scale: Florida's grading law

72 out of 80 points = 90% (A)

90%

72 out of 80 points: an A on the default scale.

LetterA

Points missed8

Each point is worth1.25%

Method: points earned ÷ points possible × 100 · Example: Sakai's gradebook help · Example default scale: Florida's grading lawLast verified Oct 19, 2026

Grading table: number wrong → percent → letter

Grading table for 80 questions on the default scale

Percent and letter for each number wrong
Wrong	Right	Percent	Letter
0	80/80	100%	A
1	79/80	98.8%	A
2	78/80	97.5%	A
3	77/80	96.3%	A
4	76/80	95%	A
5	75/80	93.8%	A
6	74/80	92.5%	A
7	73/80	91.3%	A
8	72/80	90%	A
9	71/80	88.8%	B
10	70/80	87.5%	B
11	69/80	86.3%	B
12	68/80	85%	B
13	67/80	83.8%	B
14	66/80	82.5%	B
15	65/80	81.3%	B
16	64/80	80%	B
17	63/80	78.8%	C
18	62/80	77.5%	C
19	61/80	76.3%	C
20	60/80	75%	C
21	59/80	73.8%	C
22	58/80	72.5%	C
23	57/80	71.3%	C
24	56/80	70%	C
25	55/80	68.8%	D
26	54/80	67.5%	D
27	53/80	66.3%	D
28	52/80	65%	D
29	51/80	63.8%	D
30	50/80	62.5%	D
31	49/80	61.3%	D
32	48/80	60%	D
33	47/80	58.8%	F
34	46/80	57.5%	F
35	45/80	56.3%	F
36	44/80	55%	F
37	43/80	53.8%	F
38	42/80	52.5%	F
39	41/80	51.3%	F
40	40/80	50%	F
41	39/80	48.8%	F
42	38/80	47.5%	F
43	37/80	46.3%	F
44	36/80	45%	F
45	35/80	43.8%	F
46	34/80	42.5%	F
47	33/80	41.3%	F
48	32/80	40%	F
49	31/80	38.8%	F
50	30/80	37.5%	F
51	29/80	36.3%	F
52	28/80	35%	F
53	27/80	33.8%	F
54	26/80	32.5%	F
55	25/80	31.3%	F
56	24/80	30%	F
57	23/80	28.8%	F
58	22/80	27.5%	F
59	21/80	26.3%	F
60	20/80	25%	F
61	19/80	23.8%	F
62	18/80	22.5%	F
63	17/80	21.3%	F
64	16/80	20%	F
65	15/80	18.8%	F
66	14/80	17.5%	F
67	13/80	16.3%	F
68	12/80	15%	F
69	11/80	13.8%	F
70	10/80	12.5%	F
71	9/80	11.3%	F
72	8/80	10%	F
73	7/80	8.8%	F
74	6/80	7.5%	F
75	5/80	6.3%	F
76	4/80	5%	F
77	3/80	3.8%	F
78	2/80	2.5%	F
79	1/80	1.3%	F
80	0/80	0%	F

Show the math

How the percentage was worked out
Divide	72 ÷ 80 = 0.9
Times 100	0.9 × 100 = 90%
Letter	A on the default scale

Grade percentage at a glance

How the result is worked out: Points earned ÷ points possible × 100
Lowest percent for an A (default scale): 90%
Lowest percent for a D (default scale): 60%

Sources: Sakai Community Documentation, The Florida Legislature

Good to know

Check your school's own cutoffs before you trust a letter. This page's default scale makes 60–69% a D, but College Board's conversion chart starts D at 66%, so a 62% is a D on one scale and an F on the other.
A blank in an online gradebook is not always a zero. In Sakai's percentage gradebook, an ungraded item is left out and its points come off the total possible, so your percent can drop once that item is graded.

Common questions

How to calculate grade percentage from points

Divide the points you earned by the points possible and multiply by 100. For example, 72 out of 80 is 0.90, or 90%. See the weighted grade calculator.

Source: Sakai Community Documentation

What percentage is an A?

On this calculator's default scale, Florida's state grading scale, an A is 90 to 100%, a B 80 to 89%, a C 70 to 79%, a D 60 to 69% and an F 0 to 59%. Schools set their own cutoffs, so check yours and change the scale in the form. See the high school GPA calculator for College Board's 4.0 scale, where a D starts at 66%.

Source: The Florida Legislature

Is a 65 a D or an F?

It depends on the scale. On the default scale a 65 is a D (60 to 69%). College Board's 4.0 conversion chart starts D at 66% and lists E/F below 65%, so 65 falls in neither of its rows; the high school GPA calculator, which uses that chart, counts 65% as an F.

Sources: The Florida Legislature, College Board (BigFuture)

How do I grade a test by the number wrong?

Count the questions right (the number of questions minus the number wrong), then use the usual rule: divide by the number of questions and multiply by 100. The grading table lists every possible number wrong for tests of up to 100 questions.

Source: Sakai Community Documentation

More details

More facts, beyond the ones at a glance, and where each comes from

What

Value

Source

The default scale, letter by letter (grades 6 to 12)

The default scale, letter by letter (grades 6 to 12)
Letter	Percent
A	90–100
B	80–89
C	70–79
D	60–69
F	0–59

The Florida Legislature

Plus and minus grades on the default scale

D and F on College Board's 4.0 conversion chart (the high school GPA calculator's scale)

D 66–69%, E/F below 65%

College Board (BigFuture)

College Board says schools use different cutoffs

Yes

South Carolina's A range before 2016 (90–100 since)

93–100%

South Carolina Department of Education

Total points grade calculator results for 12 common scores

Common inputs and the result this calculator gives for each
Input	Result	Detail
16 out of 20	80%	B
14 out of 20	70%	C
24 out of 30	80%	B
27 out of 30	90%	A
25 out of 30	83.3%	B
12 out of 15	80%	B
13 out of 15	86.7%	B
40 out of 50	80%	B
23 out of 25	92%	A
28 out of 30	93.3%	A
30 out of 40	75%	C
75%	C

Each input links to its row in the full table below.

Every percent from 0 to 100 as a letter

One row for each whole percent, with its letter on the default scale (A from 90%, B from 80%, C from 70%, D from 60%, F below 60%). Edit the scale in the calculator and these letters follow it.

Letter for each whole percent from 100 down to 0
Percent	Letter
100%	A
99%	A
98%	A
97%	A
96%	A
95%	A
94%	A
93%	A
92%	A
91%	A
90%	A
89%	B
88%	B
87%	B
86%	B
85%	B
84%	B
83%	B
82%	B
81%	B
80%	B
79%	C
78%	C
77%	C
76%	C
75%	C
74%	C
73%	C
72%	C
71%	C
70%	C
69%	D
68%	D
67%	D
66%	D
65%	D
64%	D
63%	D
62%	D
61%	D
60%	D
59%	F
58%	F
57%	F
56%	F
55%	F
54%	F
53%	F
52%	F
51%	F
50%	F
49%	F
48%	F
47%	F
46%	F
45%	F
44%	F
43%	F
42%	F
41%	F
40%	F
39%	F
38%	F
37%	F
36%	F
35%	F
34%	F
33%	F
32%	F
31%	F
30%	F
29%	F
28%	F
27%	F
26%	F
25%	F
24%	F
23%	F
22%	F
21%	F
20%	F
19%	F
18%	F
17%	F
16%	F
15%	F
14%	F
13%	F
12%	F
11%	F
10%	F
9%	F
8%	F
7%	F
6%	F
5%	F
4%	F
3%	F
2%	F
1%	F
0%	F

Source: The Florida Legislature

Grading calculator chart for tests worth 10 to 50 points

Each score as a percent (score ÷ total × 100, shown to one decimal) and its letter on the default scale. The letters follow your edited scale; the percents never change.

Percent and letter for each score on tests out of 10 to 50 points
Score	Percent	Letter
10 out of 10	100%	A
9 out of 10	90%	A
8 out of 10	80%	B
7 out of 10	70%	C
6 out of 10	60%	D
5 out of 10	50%	F
4 out of 10	40%	F
3 out of 10	30%	F
2 out of 10	20%	F
1 out of 10	10%	F
0 out of 10	0%	F
15 out of 15	100%	A
14 out of 15	93.3%	A
13 out of 15	86.7%	B
12 out of 15	80%	B
11 out of 15	73.3%	C
10 out of 15	66.7%	D
9 out of 15	60%	D
8 out of 15	53.3%	F
7 out of 15	46.7%	F
6 out of 15	40%	F
5 out of 15	33.3%	F
4 out of 15	26.7%	F
3 out of 15	20%	F
2 out of 15	13.3%	F
1 out of 15	6.7%	F
0 out of 15	0%	F
20 out of 20	100%	A
19 out of 20	95%	A
18 out of 20	90%	A
17 out of 20	85%	B
16 out of 20	80%	B
15 out of 20	75%	C
14 out of 20	70%	C
13 out of 20	65%	D
12 out of 20	60%	D
11 out of 20	55%	F
10 out of 20	50%	F
9 out of 20	45%	F
8 out of 20	40%	F
7 out of 20	35%	F
6 out of 20	30%	F
5 out of 20	25%	F
4 out of 20	20%	F
3 out of 20	15%	F
2 out of 20	10%	F
1 out of 20	5%	F
0 out of 20	0%	F
25 out of 25	100%	A
24 out of 25	96%	A
23 out of 25	92%	A
22 out of 25	88%	B
21 out of 25	84%	B
20 out of 25	80%	B
19 out of 25	76%	C
18 out of 25	72%	C
17 out of 25	68%	D
16 out of 25	64%	D
15 out of 25	60%	D
14 out of 25	56%	F
13 out of 25	52%	F
12 out of 25	48%	F
11 out of 25	44%	F
10 out of 25	40%	F
9 out of 25	36%	F
8 out of 25	32%	F
7 out of 25	28%	F
6 out of 25	24%	F
5 out of 25	20%	F
4 out of 25	16%	F
3 out of 25	12%	F
2 out of 25	8%	F
1 out of 25	4%	F
0 out of 25	0%	F
30 out of 30	100%	A
29 out of 30	96.7%	A
28 out of 30	93.3%	A
27 out of 30	90%	A
26 out of 30	86.7%	B
25 out of 30	83.3%	B
24 out of 30	80%	B
23 out of 30	76.7%	C
22 out of 30	73.3%	C
21 out of 30	70%	C
20 out of 30	66.7%	D
19 out of 30	63.3%	D
18 out of 30	60%	D
17 out of 30	56.7%	F
16 out of 30	53.3%	F
15 out of 30	50%	F
14 out of 30	46.7%	F
13 out of 30	43.3%	F
12 out of 30	40%	F
11 out of 30	36.7%	F
10 out of 30	33.3%	F
9 out of 30	30%	F
8 out of 30	26.7%	F
7 out of 30	23.3%	F
6 out of 30	20%	F
5 out of 30	16.7%	F
4 out of 30	13.3%	F
3 out of 30	10%	F
2 out of 30	6.7%	F
1 out of 30	3.3%	F
0 out of 30	0%	F
40 out of 40	100%	A
39 out of 40	97.5%	A
38 out of 40	95%	A
37 out of 40	92.5%	A
36 out of 40	90%	A
35 out of 40	87.5%	B
34 out of 40	85%	B
33 out of 40	82.5%	B
32 out of 40	80%	B
31 out of 40	77.5%	C
30 out of 40	75%	C
29 out of 40	72.5%	C
28 out of 40	70%	C
27 out of 40	67.5%	D
26 out of 40	65%	D
25 out of 40	62.5%	D
24 out of 40	60%	D
23 out of 40	57.5%	F
22 out of 40	55%	F
21 out of 40	52.5%	F
20 out of 40	50%	F
19 out of 40	47.5%	F
18 out of 40	45%	F
17 out of 40	42.5%	F
16 out of 40	40%	F
15 out of 40	37.5%	F
14 out of 40	35%	F
13 out of 40	32.5%	F
12 out of 40	30%	F
11 out of 40	27.5%	F
10 out of 40	25%	F
9 out of 40	22.5%	F
8 out of 40	20%	F
7 out of 40	17.5%	F
6 out of 40	15%	F
5 out of 40	12.5%	F
4 out of 40	10%	F
3 out of 40	7.5%	F
2 out of 40	5%	F
1 out of 40	2.5%	F
0 out of 40	0%	F
50 out of 50	100%	A
49 out of 50	98%	A
48 out of 50	96%	A
47 out of 50	94%	A
46 out of 50	92%	A
45 out of 50	90%	A
44 out of 50	88%	B
43 out of 50	86%	B
42 out of 50	84%	B
41 out of 50	82%	B
40 out of 50	80%	B
39 out of 50	78%	C
38 out of 50	76%	C
37 out of 50	74%	C
36 out of 50	72%	C
35 out of 50	70%	C
34 out of 50	68%	D
33 out of 50	66%	D
32 out of 50	64%	D
31 out of 50	62%	D
30 out of 50	60%	D
29 out of 50	58%	F
28 out of 50	56%	F
27 out of 50	54%	F
26 out of 50	52%	F
25 out of 50	50%	F
24 out of 50	48%	F
23 out of 50	46%	F
22 out of 50	44%	F
21 out of 50	42%	F
20 out of 50	40%	F
19 out of 50	38%	F
18 out of 50	36%	F
17 out of 50	34%	F
16 out of 50	32%	F
15 out of 50	30%	F
14 out of 50	28%	F
13 out of 50	26%	F
12 out of 50	24%	F
11 out of 50	22%	F
10 out of 50	20%	F
9 out of 50	18%	F
8 out of 50	16%	F
7 out of 50	14%	F
6 out of 50	12%	F
5 out of 50	10%	F
4 out of 50	8%	F
3 out of 50	6%	F
2 out of 50	4%	F
1 out of 50	2%	F
0 out of 50	0%	F

Sources: The Florida Legislature, Sakai Community Documentation

Percentage grade scale: the range for each letter

The percent range for each letter on the default scale, Florida's state grading scale (grades 6 to 12). Your edits in the calculator don't change this table. The calculator doesn't round, so a percent just under a cutoff keeps the lower letter.

Percent range for each letter on the default scale
Letter	Percent range
A	90–100%
B	80–89%
C	70–79%
D	60–69%
F	0–59%

Source: The Florida Legislature

How the assignment grade calculator finds your percentage

Divide the points earned by the points possible, multiply by 100, then find the band the percent falls in on the letter scale.

percent = points earned ÷ points possible × 100

If you know the number wrong, subtract it from the number of questions to get the number right.
Divide points earned by points possible.
Multiply by 100 to get the percent.
Find the letter whose lowest percent is at or below yours. On the default scale: A from 90, B from 80, C from 70, D from 60, F below 60.

Sakai's worked example: 72 of 80 points

72 ÷ 80 = 0.90
0.90 × 100 = 90%
90% is at the bottom of the default scale's A range (90–100)

90%, an A

Related: grade curve calculator

What this doesn't account for

Your school's own letter scale (edit it in the form)
A rounding rule such as counting 89.5% as 90%: the calculator doesn't round
Plus and minus grades, unless you add them to the scale
Weighted categories, where some work counts more than other work

Compared with similar grade calculators

Grade percentage next to similar grade calculators on this site
Grade calculator	How the result is worked out
Grade percentage	Points earned ÷ points possible × 100
Semester grade calculator	Each grade × its weight, added up (a weighted average of the percents); DePaul University's handout works an example
Weighted grade calculator	Category average × weight, added together; this calculator then divides by the weights graded so far (100 at most)
Grade curve calculator	One rule applied to every score, such as adding the same points or raising every score by a percentage
Quarter grade calculator	Average of the quarter percents: add them and divide by 4 (the example district's rule)

Sources

The 2026 Florida Statutes, 1003.437 Middle and high school grading systemThe Florida Legislature. Checked Oct 18, 2026.
How to Calculate Your GPA on a 4.0 ScaleCollege Board (BigFuture). Checked Oct 18, 2026.
South Carolina Uniform Grading Policy (May 14, 2019)South Carolina Department of Education. Checked Oct 18, 2026.
How are grades calculated in a percentage Gradebook?Sakai Community Documentation. Checked Oct 18, 2026.

Verified by

Checked by CountOnTools against its official sources on Oct 19, 2026. How we verify

Before and after this step

After this: high school GPA calculator

CountOnTools is not affiliated with any school, test maker or brand.

Grade Percentage Calculator

Grade percentage at a glance

Good to know

Common questions

How to calculate grade percentage from points

What percentage is an A?

Is a 65 a D or an F?

How do I grade a test by the number wrong?

More details

Total points grade calculator results for 12 common scores

Every percent from 0 to 100 as a letter

Grading calculator chart for tests worth 10 to 50 points

Percentage grade scale: the range for each letter

How the assignment grade calculator finds your percentage

Sakai's worked example: 72 of 80 points

What this doesn't account for

Compared with similar grade calculators

Sources

Verified by

Before and after this step

Related tools