Grade Converter
Last updated: August 4, 2026
Type a percentage to get its letter grade and 4.0 GPA point — or pick a letter to see its percentage range.
Percentage → letter → GPA chart
| Letter | Percentage | GPA point |
|---|---|---|
| A | 93–100 | 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 | 63–66 | 1.0 |
| D- | 60–62 | 0.7 |
| F | 0–59 | 0.0 |
This is the most common US scale. Some schools use a straight 10-point scale (A = 90–100) or add plus/minus bands differently — always check your syllabus.
How the lookup works
There's no single formula for a percentage-to-letter conversion the way there is for, say, a weighted average — it's a table lookup against ordered cutoffs. The calculator walks down the table from the top and returns the first letter whose minimum percentage your score meets or exceeds. Each letter also carries a fixed GPA point, built from a simple rule: the four flat letters step down by a whole point (A=4.0, B=3.0, C=2.0, D=1.0), and a plus or minus shifts that flat value by 0.3 in either direction (so B+ = 3.0+0.3 = 3.3 and B- = 3.0−0.3 = 2.7). Where one letter's minus meets the next letter's plus — A- at 3.7 down to B+ at 3.3 — the gap is 0.4 instead of 0.3, because that single step is absorbing two separate 0.3 adjustments either side of the whole-letter boundary.
Two worked examples
Example 1 — percentage to letter and GPA: enter 87%. Scanning the table from the top, 87 first meets the B+ cutoff (minimum 87), so the result is B+, GPA point 3.3 — one row below A- (which needs at least 90) and one row above B (which tops out at 86).
Example 2 — letter to percentage: pick C-. The table gives a range of 70–72% and a GPA point of 1.7. Reversing example 1's logic, any raw score of 70, 71 or 72 converts to this same C-/1.7 pair — the letter-to-percentage direction returns a range rather than a single number because many raw scores map to the same letter.
Frequently asked questions
Is there one official conversion?
No. The table above is the most widely used, but institutions set their own cutoffs — see the worked examples above for how the lookup actually runs.
How do I convert to another country's system?
Use the international GPA conversion page for UK, Canada, India, Australia, Germany and more equivalents.
Why do GPA points step by 0.3 or 0.4 between adjacent grades?
Each letter has a flat GPA (A=4.0, B=3.0, C=2.0, D=1.0), and a plus adds 0.3 while a minus subtracts 0.3 from that flat value. That makes most neighbouring steps 0.3, except where one letter's minus (like A- at 3.7) meets the next letter's plus (like B+ at 3.3) — that gap is 0.4 because it's the sum of two 0.3 adjustments either side of the whole-letter boundary.
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