What letter grade does my percentage convert to?

How we calculated this

Each band you define covers a half-open interval: at or above the lower bound, and strictly below the upper bound. A percentage matches exactly one band, or none if there is a gap in your scale. Using the example above, a B+ band of [87%, 90%) matches 89.5% exactly, since 89.5 is at least 87 and less than 90.

Bands are checked in the order you entered them, and the first one that matches wins. If two bands accidentally overlap, for example a B+ ending at 90% and an A- starting at 89%, the earlier band in your list claims that overlapping range silently rather than the tool flagging a conflict, so it is worth listing bands in the same order your syllabus does and double-checking any range you expect two grades to compete for.

Limitations

Nothing here is a preset or a common convention; every band is exactly what you typed. If your course's real scale has a gap, the result reports that no band matched rather than silently picking a side, since a mistake in your own scale is worth catching. This converts a percentage to a letter only; it does not map a letter to a GPA grade point, since GPA point scales vary by school and by whether plus/minus grades carry their own value.

Common mistakes

A frequent error is entering bounds as decimals (0.87) instead of percentages (87) in a field that expects percentages, which shifts every band far outside any realistic score. Another is leaving an accidental gap, such as a B+ ending at 89% and an A- starting at 90%, which silently strands any score of exactly 89.5% with no matching band. A third is entering overlapping bands in the wrong order and assuming the higher letter wins, when it is actually whichever band appears first in your list.

Frequently asked

What happens if my percentage does not match any band?

The result says so directly, which usually means there is a gap between two of your bands. Check the upper bound of the band below and the lower bound of the band above.

Why is the upper bound exclusive?

So adjacent bands do not overlap: a B+ ending at 90% and an A- starting at 90% each claim exactly 90.0% without double-counting it.

Do I need to enter every band in my scale?

Only the bands relevant to the percentage you are checking, though entering the full scale once makes it easy to convert future scores without re-entering everything.

What if my school uses plus/minus grades inconsistently?

Enter the bands exactly as your specific course defines them; a plus/minus scale can vary by department or instructor even within the same school.

Can I save my scale for reuse across courses?

Not automatically; re-enter the bands each visit, or keep a note of your common scales somewhere convenient since nothing is saved without your explicit action.

Next decision

If you are close to a boundary, see Grade Rounding Threshold to find the exact raw score you need before rounding applies.

Converting a grade you have not calculated yet? Get the percentage first from Current Weighted Course Grade or Points-Based Course Grade, whichever matches how your course is graded.