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Grade Percentage Calculator

The quick one. You got 17 out of 20 on the quiz and you want to know what that actually is. Earned points over possible points, times 100 — this tool does it in real time and throws in the letter it roughly matches on the usual US bands.

No settings to speak of. Type the two numbers and read the percentage.

Got a score and a total? Enter how many points you earned and how many were possible, and this turns it into a percentage plus the letter it roughly matches.

The formula

Percentage = points earned ÷ points possible × 100

It’s one division and a multiply. The tool also maps the result to a letter using the standard US 4.0 percentage bands, purely so you can talk about your score in letters without checking a chart.

Worked example

You scored 42 out of 50 on the midterm.

  • 42 ÷ 50 = 0.84
  • 0.84 × 100 = 84%
  • On US bands that’s a B (83–86)

Already have it at 85% (like 17/20)? That’s still a B on most charts. It’s when you cross 90 that the letter flips to A minus and above — the bands are the whole game.

Here’s the round-number version of that same table, which is the one most syllabi hand out:

Percentage Letter Points on the 4.0 scale
90–100 A 4.0
80–89 B 3.0
70–79 C 2.0
60–69 D 1.0
below 60 F 0.0

The ten-point version is coarser, so it disagrees with the fine-grained one in a specific range that catches people out: 93–96 is an A on both, but 97–100 is an A+ on the fine table and still just an A here. If your transcript shows A+ and A separately, the fine table is the one your school uses.

When this is enough and when it isn’t

This is exactly the right tool when a single score has a single total — a quiz, a test, a paper. It isn’t the tool for a whole course where assignments carry different weights; that’s the weighted grade calculator. And it’s not a GPA — it tells you one score’s percentage, not how several courses blend.

Frequently asked questions

What if my paper is out of 100 and I got a fraction?

Still works — type the earned points with a decimal (like 12.4) and the total stays 100. The percentage follows the same formula.

Why does 17/20 say B but my professor called it a B+?

Different rubrics. The bands here are the common US 4.0 ones (B is 83–86, B+ is 87–89), but your course’s own chart is what makes the call.

Can I use this for attendance?

Sure — days attended over total days works the same way and gives your attendance percentage.

Does it round?

Yes, to two decimals of a percentage (like 91.67%). The letter uses the unrounded value so a 89.6 stays in the B+ band, not the A−.

How do I turn this percentage into my GPA?

That needs the credit-weighted route — each course becomes a letter, each letter a point value, and the term average blends by credit hours. The GPA calculator does that whole dance.

Other tools

Or browse everything on the student GPA tools page.