What is the standard US GPA scale?

The most common scale assigns A=4.0, B=3.0, C=2.0, D=1.0, and F=0.0. With plus/minus grades, an A+ is 4.3, A is 4.0, A- is 3.7, and so on down the scale.

Do all schools use plus/minus grades?

No. Some institutions use a simpler scale with only A, B, C, D, and F without plus or minus distinctions. This tool supports both scales via the toggle.

What percentage is an A?

Typically 90–100% earns an A. An A+ is usually 97–100%, A is 93–96%, and A- is 90–92%, though exact cutoffs vary by school and instructor.

Is a 4.3 GPA possible?

Yes, on the plus/minus scale an A+ is commonly assigned 4.3, although some schools cap the GPA at 4.0 and treat A+ the same as A.

What is a passing grade?

In most US colleges a D (1.0 GPA, ~60–62%) is the lowest passing grade, though many programs require a C or higher in major courses.

How accurate are the percentage ranges shown?

The ranges shown reflect the most widely used US university standard. Your institution may use slightly different cutoffs, so always check your school's official grading policy.

Letter Grade Converter

Convert any letter grade, percentage score, or GPA value instantly using common US grading scales.

Convert a Grade

Scale:

Letter Grade

Full Grade Scale Reference

Standard US university grading scale

Letter	Percentage	GPA	Description

Summary

This tool converts between letter grades, percentage ranges, and GPA values on the standard US 4.0 scale. Enter a letter grade like B+ to see its GPA equivalent and typical percentage range, or type a percentage to find the matching letter grade. Useful for students comparing grades across institutions with different grading policies.

How it works

Choose your input type: Letter Grade, Percentage, or GPA.
Enter a value in the input field.
The tool instantly shows the corresponding letter grade, percentage range, and GPA.
Switch between standard and plus/minus scales using the toggle.
Use the full reference table at the bottom to see all grade mappings at once.

Use cases

Convert a percentage score to a letter grade for your transcript.
Check the GPA equivalent of a letter grade received on an assignment.
Compare grading scales between US universities.
Understand international grade equivalencies when applying abroad.
Calculate whether a grade qualifies for honors or scholarships.
Confirm your GPA threshold for academic standing requirements.

Frequently Asked Questions

Last updated: 2026-05-29 · Reviewed by Nham Vu