Grading
New grade with extra credit
Both halves of the fraction grow by the extra credit amounts.
The Formula
new grade = (earned + extra earned) / (possible + extra possible)
Both halves of the fraction grow by the extra credit amounts.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| new grade | Updated grade | percent | The grade after extra credit, as a percentage. |
| earned | Points earned | points | The points scored before extra credit. |
| possible | Points possible | points | The total available before extra credit. |
| extra earned | Extra points scored | points | The extra credit actually earned. |
| extra possible | Extra points offered | points | The extra credit on offer. |
What Each Symbol Means
new gradepercent
Updated grade
The grade after extra credit, as a percentage.
earnedpoints
Points earned
The points scored before extra credit.
possiblepoints
Points possible
The total available before extra credit.
extra earnedpoints
Extra points scored
The extra credit actually earned.
extra possiblepoints
Extra points offered
The extra credit on offer.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate extra credit page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate Extra Credit, filed under Education. Every number the guide produces comes from substituting into this one line.