Grade Calculator Got 16 out of 20 on a quiz and have no idea if that’s good? (It’s 80% — a B−. Not bad.) This calculator turns any “score out of total” into a percentage and a letter grade instantly.
It’s the fastest tool on this site, and somehow the one students use most. Quiz scores, test scores, homework points, lab grades — type two numbers, get your answer.
Grade % Calculator
％ Quick toolWhat is 16 out of 20? Type it in.
The one formula behind it
Percentage = (Score ÷ Total) × 100
That’s it. 16 ÷ 20 × 100 = 80%. The letter grade follows the standard scale: 90%+ is an A, 80%+ a B, 70%+ a C, 60%+ a D, and below that is F territory (with plus/minus refinements in between).
Why small scores feel confusing
Fractions like 13/15 or 26/30 are hard to judge at a glance — your brain doesn’t do the division automatically. That’s exactly why this page exists: paste the numbers, see the percent, know where you stand. No mental math, no uncertainty.
From one score to the whole semester
A single percentage is a snapshot. To see the full picture — every assignment combined, with power-ups like dropping your lowest score — run your numbers through our main grade calculator. And if you’re wondering what you need on the final to hit your target, the final grade calculator has your answer.
Frequently asked questions
What grade is 16/20?
80% — a B− on the standard scale.
What grade is 45/50?
90% — an A−. Nicely done.
Is the letter scale the same everywhere?
Mostly, but not exactly. Some teachers curve, some schools shift the cutoffs. The standard scale used here (90/80/70/60) is the most common in the US.
Related tools: Grade calculator · Final grade calculator · GPA to percentage