Grade Percentage Calculator

About this tool

Enter the points earned and total points possible on a test or assignment to see the percentage score and an approximate US letter grade.

Frequently asked questions

What letter grade scale is used?

A common standard US scale: 90–100% = A, 80–89% = B, 70–79% = C, 60–69% = D, below 60% = F. Some schools use pluses/minuses or a different scale — check with your specific institution for the scale that counts toward your record.

Can points earned be more than total points?

The tool will still calculate a percentage over 100% if extra credit pushed the score above the total, though most grading scales cap the letter grade at the top regardless.

Does this handle negative or missing values?

Negative numbers or a total of zero are treated as invalid input, since a percentage can't be meaningfully calculated from them.