Grade Percentage Calculator
When you already have the percentage and want the letter, this page takes the figure straight: type 89.5 and it is a B+ on the plus/minus scale, a B on whole letters. The bands it reads are printed underneath and switch with the scale, so the answer is always checkable against the numbers it came from. If you have points rather than a percentage, the Points and Quick modes work them out first.
- Mode
- Percentage
- Scale
89.50% is a B+ on the plus / minus scale.
- Percentage
- 89.50%
- Letter
- B+
Worked examples
Each one runs through the same code the page above does, on the plus / minus scale, so switching the scale moves them too.
The scale in use
Every band includes its own floor and runs up to the next one. On this scale, 89.99% is B+ and 90% is A-. The displayed two-decimal percentage does not determine the letter.
| Letter | Percentage band |
|---|---|
| A+ | 97% and above |
| A | 93% up to 97% |
| A- | 90% up to 93% |
| B+ | 87% up to 90% |
| B | 83% up to 87% |
| B- | 80% up to 83% |
| C+ | 77% up to 80% |
| C | 73% up to 77% |
| C- | 70% up to 73% |
| D+ | 67% up to 70% |
| D | 63% up to 67% |
| D- | 60% up to 63% |
| F | 0% up to 60% |
Common questions
- What letter grade is my percentage?
- On the plus/minus scale used here, 97 and above is an A+, 93 an A, 90 an A-, 87 a B+, 83 a B, 80 a B-, 77 a C+, 73 a C, 70 a C-, 67 a D+, 63 a D, 60 a D- and anything below 60 an F. Each band includes its own number and runs up to the next one. The table under the calculator lists them, and it redraws if you switch to whole letters.
- Is 89.5% an A minus?
- Not on this page. 89.5% is a B+, because the A- band starts at 90 and nothing is rounded on the way to the letter. Plenty of courses do round, and plenty of instructors round at their own discretion. That is a syllabus rule, so the honest thing for a calculator that has not read it is to show the band the number actually falls in and let you apply your course's rule yourself.
- How do I turn points into a percentage first?
- Use Quick mode for one score, or Points mode for a whole term. Twenty-two of 25 is 88.00%, and 493 of 550 is 89.64%. Both then read against the same scale as this page, so the letter matches whichever route you took.
- What if my school's cut-offs are different?
- Switch the Scale control to Whole letter if there are no pluses or minuses, which puts an A at 90, a B at 80, a C at 70 and a D at 60. If your bands match neither scale, compare your percentage against your own table: the entered percentage can be checked directly against your own grading bands, while the letter is only as right as the scale it was read against.
- Does it accept a percentage sign or a decimal?
- Both. 83, 83% and 83.4 are all read the same way, and spaces around the figure are ignored. A negative percentage is refused with a message saying why, and so is anything that is not a number, such as a letter grade typed into the box.
- Can this convert an A or B into a unique percentage or GPA?
- A letter names a band of percentages, not a unique number, so the tool does not reverse letters to a percentage or calculate a GPA from this box. Enter an actual percentage to read the shown letter scale; GPA Calculator uses course letters and GPA credit hours for the grade-point average.
- Can I use a 10-point grading scale?
- Choose Whole letter for the common 10-point percentage bands: A at 90%, B at 80%, C at 70%, D at 60% and F below 60%. This interprets a percentage using letter cut-offs; it does not turn a 0-to-10 GPA or a standards-based rubric level into a percentage. Use the cut-offs from your own syllabus if they differ.
Percentages use the scores and weights you enter and are displayed to two decimals. Letter grades use the computed percentage against the selected scale. Attainable final-score targets round upward to the next 0.01% and assume one remaining component scored from 0% to 100%. Curves, dropped scores and institutional rounding policies must come from your syllabus.