What-if grade calculator

See how one more assignment, test or quiz would change your grade before you take it.

Short answer Add the new assignment's points to your points so far and divide again, or, for a weighted class, blend your current grade with the new score by the assignment's weight. Try a few scores below to see what each would do to your grade.

How is your class graded?
Points so far, and the new assignment
Letter grade scale

Lowest percentage for each letter. Below D is an F. Saved in this browser for every calculator on the site.

Schools set their own scales. Compare common scales.

The formulas

Points: new grade = (earned + new earned) ÷ (possible + new possible)Weighted: new grade = current × (1 − w) + score × w

Worked examples

Points: you have 170 out of 200 points (85%). Scoring 45 out of 50 on the next assignment gives 215 out of 250, which is 86%. Your grade goes up 1 point.

Weighted: you have 88% and the next test is worth 15% of your grade. A 70% on it gives 88 × 0.85 + 70 × 0.15 = 85.3%, a 2.7-point drop.

Common questions

How much will one test change my grade?
It depends on how much the test is worth compared with everything already graded. A 50-point test added to 200 points of earlier work moves your grade far more than the same test added to 900 points.
Should I use points or weight?
Use points if your teacher adds up points across the whole class. Use weight if your syllabus says something like 'tests are 40% of the grade' and you know what share of your grade this one assignment is.
Why did a good score barely raise my grade?
Late in the term, a lot of work is already counted, so each new assignment is a smaller share of the total. Early in the term, single assignments swing your grade more.

Check your syllabus. This calculator uses the numbers you enter. Your teacher's gradebook, weights, rounding rules and grading scale decide your official grade, and they can differ from the common scales used here.