Digital Toolchest

Percentage to Letter Grade Converter

Turn any percentage into a letter grade instantly. Paste your score and get the standard US letter grade including plus and minus grades.

Percentage score

Enter a percentage between 0 and 100.

Enter a single number. Decimals are supported — for example, 87.5.

Letter gradeStandard US letter grade for the percentage you entered.

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Your letter grade will appear here...

Converts instantly on any device.

How to convert a percentage to a letter grade

Convert in 3 steps

Takes ~5 seconds
  1. 1
    Enter your percentage

    Type your score — whole numbers or decimals both work.

  2. 2
    Read the conversion

    Your letter grade updates automatically as you change the percentage.

  3. 3
    Copy your result

    Copy the letter grade to use in a gradebook, report, or email.

Scores at boundary values like exactly 90 or 80 return the higher grade (A- and B- respectively).

Who should use this tool?

  • Students converting a returned percentage score to understand their letter grade standing
  • Teachers translating average scores into letter grades for report cards
  • Parents checking what a test score means on the standard grading scale

Examples

A score of 87.5 falls in the B+ range.

Input
Percentage
87.5
Output
B+ (87.5%)

A score of 93 is the start of the A range.

Input
Percentage
93
Output
A (93%)

A score of 72 falls in the C range.

Input
Percentage
72
Output
C (72%)

Standard US percentage to letter grade conversion

Quickly find out what letter grade a percentage score corresponds to. Uses the standard US scale with plus and minus grades recognized by most schools and universities.

This percentage to letter grade converter uses the standard US grading scale to convert any score from 0 to 100 into a letter grade. Supports plus and minus grades including A-, B+, and C-. Useful for students, teachers, and parents who need a quick grade conversion without memorizing the full grading scale.

Plus and minus grades

Get the full letter grade including A-, B+, C+, and every variant on the standard scale.

  • Full 12-point scale
  • Includes plus and minus
  • Matches most US institutions
Decimal support

Enter precise scores like 89.7 or 92.3 and get the correct letter grade.

  • Supports decimals
  • Handles edge cases
  • Accurate boundary handling
No setup needed

No account, no login, no data sent anywhere. Just enter a number and get your grade.

  • Instant result
  • Works offline
  • Fully private
Privacy first: we never send your input to a server. Everything runs locally in your browser.

Grade conversion tips

Get the most from this converter.

  • Check your school or university syllabus — some institutions use slightly different cutoffs than the standard scale.
  • For weighted course grades, use the Weighted Grade Calculator to find your percentage first, then convert here.
  • Decimal precision matters near boundaries — 89.9 is a B+ while 90.0 is an A-.

Frequently asked questions

What is the standard US grading scale?>
A (93-100), A- (90-92), B+ (87-89), B (83-86), B- (80-82), C+ (77-79), C (73-76), C- (70-72), D+ (67-69), D (63-66), D- (60-62), F (below 60).
What if my school uses a different grading scale?>
Grading scales vary by institution. Some schools set A at 90 instead of 93, or do not use plus and minus grades. Always verify the scale your course uses — this tool follows the most common US standard.
Can I convert a letter grade back to a percentage?>
This tool converts percentage to letter grade only. For the reverse, use the midpoint of the letter grade range — for example, a B is approximately 85%.
Does 90% count as an A- or a B+?>
On the standard scale used here, 90% is an A-. The A- range is 90 to 92. The B+ range tops out at 89.

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