Letter Grade Calculator
Type a score to get its letter, or pick a letter to get the score range it covers. Either box fills the other.
Schools do not agree on this. Untick a letter your school does not award, or change any cutoff and points value to match your handbook.
85% is a B. So is 83. On a plus/minus scale, 87 is a B+ and 82 is a B-. If you just need the letter for one number, that's the answer. This letter grade calculator does the conversion for any percentage or raw score (like 47/55), on a standard scale, a plus/minus scale, or your teacher's custom one, and shows the GPA points too.
How to use it
Type a percentage, or type points earned and points possible. Choose the scale. You'll see the letter and its value on a 4.0 scale.
Example: 47 out of 55 on a chemistry exam. 47 ÷ 55 = 85.45%. On plus/minus, that's a B worth 3.0. On a 7-point scale, where many districts put the B cutoff at 85, you'd be holding on by less than half a point.
The scale most US schools start from
| Letter | Percent | GPA points |
|---|---|---|
| A+ | 97–100 | 4.0 |
| A | 93–96 | 4.0 |
| A- | 90–92 | 3.7 |
| B+ | 87–89 | 3.3 |
| B | 83–86 | 3.0 |
| B- | 80–82 | 2.7 |
| C+ | 77–79 | 2.3 |
| C | 73–76 | 2.0 |
| C- | 70–72 | 1.7 |
| D+ | 67–69 | 1.3 |
| D | 65–66 | 1.0 |
| F | below 65 | 0.0 |
Treat it as a default. Some schools give A+ a 4.3. Some set D at 60–69 with no D+ or D-. That's the whole reason the custom option exists.
How the conversion actually works
Get a percentage first, (earned ÷ possible) × 100, then find the band it falls in. A letter grade is only a label for a range. Starting from several weighted categories instead of one score? Get the overall percentage with the grade percentage calculator, then bring it back here.
Little things that matter
Rounding is a policy. 89.5 becomes 90 in some classes and stays 89 in others. It's a fair question to ask on day one.
Plus/minus might not reach your GPA. Some schools print B+ on report cards but count it as a flat B in the GPA. When you work out your GPA, use your school's point values. Our post on how to calculate grades to GPA goes through that conversion line by line.
A B+ isn't 3.3 everywhere. A few schools use 3.33 or 3.5.
Other countries don't map neatly. A UK 2:1, an IB 6 and a Philippine 1.25 aren't A, B or C in any official way. For Philippine grades there's a separate GWA to GPA converter.
Converting a whole gradebook at once
Teachers sometimes need to convert a full column of percentages into letters for a report card. Set your custom scale once, then run each score through. Faster than eyeballing a chart, and you won't accidentally mark an 86.9 as a B+ when your scale says B.
Students can do the same with a semester's worth of grades to see their letters before transcripts update. If two or three are hovering near a cutoff, that's useful to know early.
One more thing: always confirm if your teacher uses "at least 90" or "above 90" for an A-. It sounds trivial. On a 90.0, it isn't.
Frequently asked questions
What letter is 85%?
A B on almost every US scale, worth 3.0 GPA points on plus/minus.
Is an 89.5 an A- or a B+?
Depends on rounding. Round to the nearest whole number and it's a 90, an A-. Otherwise it's a B+.
What's a 7-point grading scale?
A stricter scale where an A starts around 93, a B at 85, and a C at 77, instead of 90/80/70.
Can I use my teacher's cutoffs?
Yes. Choose custom and type the lowest percent for each letter.
From the blog
Want the reasoning behind the numbers? These guides go a bit deeper.