Grade Calculator FAQ: Your Grading Questions Answered
This grade calculator FAQ answers the most common questions about percents, letter grades, weighted grades, finals, GPA, rounding and privacy, with a link to the right calculator for each.
Last reviewed October 2026.
Grade calculator FAQ: the quick answer
To find a grade, divide points earned by points possible and multiply by 100, then compare that percent with your grading scale. A score at or above a cutoff earns that letter. Weights, drops, curves and rounding change the answer, so use the calculator that matches your class. Results are estimates, and your teacher decides the official grade.
Grade calculator FAQ: grade basics
How do I calculate my grade?
Divide the points you earned by the points possible, then multiply by 100. For example, 42 out of 50 is 42 ÷ 50 × 100 = 84%. Try the easy grader.
What is the difference between a percent and a letter grade?
The percent is your score out of 100. The letter is the band that percent falls in on a grading scale. A score at or above a cutoff earns that letter.
What letter grade is 90%?
On the standard scale 90% is an A. On a 7-point scale it is a B, because an A needs 93%. Check your own scale.
How do I calculate a weighted grade?
Multiply each category grade by its weight, add the results, and divide by the total of the weights. Use the weighted grade calculator.
Grade calculator FAQ: finals, midterms and targets
How do I find the score I need on my final?
Use (target × 100 − current grade × (100 − final weight)) ÷ final weight. The final grade calculator does it for you.
What if the score I need is over 100%?
Then the target is not possible unless your teacher offers extra credit. Try a lower target, or check the weights you entered.
Why is the needed score rounded up?
Rounding down could leave you slightly short of your target. The calculators round needed scores up to two decimals.
GPA and grading scale questions
How is GPA calculated?
Multiply the grade points of each course by its credits, add them, and divide by the total credits. The GPA calculator supports 4.0 and 4.3 scales, with honors and AP options.
What is the standard grading scale?
A is 90% and up, B 80%, C 70%, D 60% and F below 60%. It is a common example, not a rule. See the grading charts.
Can I use my school’s own scale?
Yes. Choose Custom and enter 2 to 20 grades with cutoffs that fall from the top and end at 0. The grading scale calculator can print it.
Rounding, extra credit and curve questions
Does 89.5% round up to an A?
Not by default. 89.5% is a B on the standard scale. If your teacher rounds first, turn on Round before grading, and it becomes 90%, an A.
Does extra credit work?
Yes. You can enter a score above the points possible, and the percent can go over 100%.
How do I drop my lowest grade?
The quiz and grade average calculators let you drop the lowest scores before averaging.
What is a grade curve?
A method that adds to scores or rescales them. The grade curve calculator shows flat add, top to 100%, square root and linear stretch. It shows a possibility, not what your teacher will do.
Privacy and accuracy questions
Are my grades saved or uploaded?
No. Everything runs in your browser. Only your grading scale choice is kept in your browser. See the privacy policy.
Are the results official?
No. They are estimates. Your teacher or school sets the official grade. See the disclaimer.
How accurate are the calculators?
They use exact fractions and are tested in several ways, but testing cannot prove zero errors. The grading methodology lists every formula. Report problems through the contact page.
Still stuck?
See how it works to choose a calculator, or contact us.