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School & Study

Test Grade Calculator

Free test grade calculator: enter points earned and points possible to get your percentage and letter grade. Supports the plus/minus scale, a plain A–F scale, or a custom scale — and shows how many points away the next letter up is.

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Enter the points above, then press Calculate.

Deep dive guides

A LITTLE CONTEXT · 4 MIN READLetter Grade Scales: How a Fraction Becomes an A−
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How test grade calculator works

A test grade starts as a fraction: points earned over points possible. Multiply by 100 and you get the percentage — 45 out of 50 is 90%. That fraction is the whole story; every grading system is just a set of agreed cut points laid on top of it.

This calculator then maps the percentage onto a letter scale. The plus/minus scale is the 13-step standard most colleges use: A+ starts at 97, A at 93, A− at 90, B+ at 87, and so on down to D− at 60. The plain scale is the 5-letter version (A 90, B 80, C 70, D 60). You can also paste a custom scale like “A:92, B:84, C:70” to match a specific teacher or school.

Beyond the letter, the calculator shows the next letter up and exactly how many points it would have taken: 45/50 lands on A− (90%), and A starts at 93% — that is 46.5 points, so 47/50. Seeing “2 points away” turns a finished test into useful information for the next one.

Frequently asked questions

How is a test percentage calculated?
Divide points earned by points possible and multiply by 100. For example, 43 out of 48 is 43 ÷ 48 × 100 = 89.6%, which lands on B+ on the plus/minus scale.
What is the plus/minus grading scale?
A 13-letter scale where A+ starts at 97%, A at 93%, A− at 90%, B+ at 87%, B at 83%, B− at 80%, C+ at 77%, C at 73%, C− at 70%, D+ at 67%, D at 63%, D− at 60%, and F below 60%.
How do I use a custom grading scale?
Choose “Custom” and paste letter-threshold pairs such as “A:92, B:84, C:70, D:60”. Colons, equals signs, or spaces all work as the separator, and you can include plus/minus letters like A−. The lowest letter should cover your worst realistic score.
Why does the next letter sometimes need a half point?
A 93% threshold on a 50-point test is 46.5 points — you cannot earn half a point, so the calculator rounds the requirement up to the next whole point (47). The percentage view shows the exact threshold; the points view shows what you can actually score.

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