Home › Grade Calculators › Out of 50 Grade Calculator
Out of 50 Grade Calculator
Enter your points and this calculator turns a score out of 50 into a percentage and a letter grade. It also shows how many more points you needed for the next letter. The formula is score ÷ 50 × 100. For example, 43 out of 50 is 43 ÷ 50 = 0.86, and 0.86 × 100 = 86%, which is a B on the College Board style scale and a B on a plain 10-point scale.
Each point out of 50 is worth exactly 2%, so double the score to get the percentage: 35/50 is 70%, 40/50 is 80% and 45/50 is 90%.
On a plain 10-point scale you need 45/50 for an A (90%), 40 for a B, 35 for a C and 30 for a D. The College Board style scale adds plus and minus grades and moves the D cut-off to 65%, which is 32.5/50. Schools set their own scales, so use the one in your syllabus if it differs. If your test had a different total, for example extra-credit questions, change the ‘Out of’ box and the calculator still works.
Result and step-by-step working
Letter grade: B on the College Board style (A+ 97, A 93, A− 90 … D 65) scale
- Divide the score by the total43 ÷ 50 = 0.86.
- Multiply by 1000.86 × 100 = 86% (7 points lost, 14% of the total).
- Look up the letter86% is a B. The next letter, B+, starts at 87%, which is 43.5 out of 50 (0.5 more points).
| Letter | Starts at | Minimum score out of 50 |
|---|---|---|
| A+ | 97% | 48.5 |
| A | 93% | 46.5 |
| A− | 90% | 45 |
| B+ | 87% | 43.5 |
| B | 83% | 41.5 |
| B− | 80% | 40 |
| C+ | 77% | 38.5 |
| C | 73% | 36.5 |
| C− | 70% | 35 |
| D+ | 67% | 33.5 |
| D | 65% | 32.5 |
Out of 50 grade chart
Every score from 50 down to 0, with the percentage and the letter grade on two common US scales. College Board style: A+ 97, A 93, A− 90, B+ 87, B 83, B− 80, C+ 77, C 73, C− 70, D+ 67, D 65, F below 65. Plain 10-point: A 90, B 80, C 70, D 60, F below 60.
| Score | Percent | Letter (College Board style) | Letter (plain 10-point) |
|---|---|---|---|
| 50/50 | 100% | A+ | A |
| 49/50 | 98% | A+ | A |
| 48/50 | 96% | A | A |
| 47/50 | 94% | A | A |
| 46/50 | 92% | A− | A |
| 45/50 | 90% | A− | A |
| 44/50 | 88% | B+ | B |
| 43/50 | 86% | B | B |
| 42/50 | 84% | B | B |
| 41/50 | 82% | B− | B |
| 40/50 | 80% | B− | B |
| 39/50 | 78% | C+ | C |
| 38/50 | 76% | C | C |
| 37/50 | 74% | C | C |
| 36/50 | 72% | C− | C |
| 35/50 | 70% | C− | C |
| 34/50 | 68% | D+ | D |
| 33/50 | 66% | D | D |
| 32/50 | 64% | F | D |
| 31/50 | 62% | F | D |
| 30/50 | 60% | F | D |
| 29/50 | 58% | F | F |
| 28/50 | 56% | F | F |
| 27/50 | 54% | F | F |
| 26/50 | 52% | F | F |
| 25/50 | 50% | F | F |
| 24/50 | 48% | F | F |
| 23/50 | 46% | F | F |
| 22/50 | 44% | F | F |
| 21/50 | 42% | F | F |
| 20/50 | 40% | F | F |
| 19/50 | 38% | F | F |
| 18/50 | 36% | F | F |
| 17/50 | 34% | F | F |
| 16/50 | 32% | F | F |
| 15/50 | 30% | F | F |
| 14/50 | 28% | F | F |
| 13/50 | 26% | F | F |
| 12/50 | 24% | F | F |
| 11/50 | 22% | F | F |
| 10/50 | 20% | F | F |
| 9/50 | 18% | F | F |
| 8/50 | 16% | F | F |
| 7/50 | 14% | F | F |
| 6/50 | 12% | F | F |
| 5/50 | 10% | F | F |
| 4/50 | 8% | F | F |
| 3/50 | 6% | F | F |
| 2/50 | 4% | F | F |
| 1/50 | 2% | F | F |
| 0/50 | 0% | F | F |
Frequently asked questions
- What is 40 out of 50 as a percentage?
- 40 ÷ 50 × 100 = 80%. That is a B− on the College Board style scale and a B on a plain 10-point scale.
- What is 35 out of 50 as a percentage?
- 35 ÷ 50 × 100 = 70%. That is a C− on the College Board style scale and a C on a plain 10-point scale.
- What is 45 out of 50 as a percentage?
- 45 ÷ 50 × 100 = 90%. That is a A− on the College Board style scale and a A on a plain 10-point scale.
- How many points can I lose out of 50 and still get an A?
- An A starts at 90% on a plain 10-point scale, which is 45/50. With whole-point marking you can lose 5 points. On the College Board style scale an A (not A−) starts at 93%, which is 46.5/50.
- What is a passing score out of 50?
- With a 60% pass mark you need 30/50. With a 65% pass mark, as on the College Board style scale, you need 32.5/50. Some courses pass at 50% (25/50); check your syllabus.
Last reviewed: October 9, 2026. Calculations run in your browser; nothing you enter is sent anywhere.