US letter grade scale
| Percentage | Letter grade |
|---|---|
| 90-100% | A |
| 80-89% | B |
| 70-79% | C |
| 60-69% | D |
| Below 60% | F |
How it works
score % = (questions − wrong) ÷ questions × 100letter grade from the scale: A 90+, B 80s, C 70s, D 60s, F under 60
- questions
- the total number on the test
- wrong
- how many were answered incorrectly
- score %
- the percentage correct
Grading scales vary by school. Some use pluses and minuses, or set the A boundary at 93 rather than 90, so check your own scale if the letter matters.
Frequently asked questions
What grade is 17 out of 20?
85%, which is a B on the standard US scale.
How do I calculate a test grade?
Divide the number correct by the total, then multiply by 100 for the percentage.
What percentage is a passing grade?
Usually 60% (a D) is the lowest passing grade, though many courses set the bar higher.
What grade is 45 out of 50?
90%, an A.
What is 7 out of 10 as a grade?
70%, a C.
Related conversions
Need more? Final grade works out the score you need on the final exam to hit a target, and grade curve adds curve points to a score. Both use the same A to F scale.