Test Average Calculator
Drop in your quiz and test scores, get the average and its letter grade. Add as many rows as the semester threw at you.
Add as many scores as you like · everything stays in your browser.
When a plain average is the right tool
Use this when every score counts equally — a quiz category where each quiz has the same weight, or a quick "where am I" check across exams. If your syllabus assigns different percentages to homework, midterms and finals, use the weighted calculator instead; the plain average will mislead you exactly when it matters.
| Letter | Percent |
|---|---|
| A+ | 97–100% |
| A | 93–96.99% |
| A- | 90–92.99% |
| B+ | 87–89.99% |
| B | 83–86.99% |
| B- | 80–82.99% |
| C+ | 77–79.99% |
| C | 73–76.99% |
| C- | 70–72.99% |
| D+ | 67–69.99% |
| D | 63–66.99% |
| D- | 60–62.99% |
| F | below 60% |
Worth knowing
Ask about rounding before finals week
An 89.5 is an A- in some classes and a B+ in others. Professors have wildly different rounding policies, and the polite time to ask is mid-semester, not the night grades post.
Confirm the scale in your syllabus
The 90/80/70/60 letter cutoffs used here are the most common US scale, but plenty of courses curve, use plus/minus bands differently, or set an A at 94. The syllabus — not any calculator — is the contract that counts.
Common questions
What's the difference between weighted and unweighted averages?
An unweighted average treats every score equally: add them up, divide by the count. A weighted average multiplies each category by its share of the grade first — homework 20%, midterms 40%, final 40% — which is how most courses actually work. If your syllabus lists category percentages, you need the weighted version.
How are letter grades calculated from percentages?
Most US schools map percentages to letters in 10-point bands: 90–100 is an A range, 80–89 a B range, 70–79 a C range, 60–69 a D range, and below 60 an F. Plus/minus splits each band roughly in thirds (e.g. 90–92 = A-, 93–96 = A, 97+ = A+). Individual schools and professors can and do vary the cutoffs.
Do these calculators store my grades?
No. Everything is computed in your browser the moment you press Calculate — nothing is uploaded, saved or seen by anyone else. Refresh the page and it's gone.