Grading
Extra points needed for a target
How many of the offered points you must score to reach a target grade.
The Formula
extra needed = target x (possible + extra possible) - earned
How many of the offered points you must score to reach a target grade.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| extra needed | Points required | points | The extra points needed to reach the target. |
| target | Target grade | decimal | The grade you want, as a decimal. |
| possible | Points possible | points | The original total. |
| extra possible | Extra offered | points | The extra credit on offer. |
What Each Symbol Means
extra neededpoints
Points required
The extra points needed to reach the target.
targetdecimal
Target grade
The grade you want, as a decimal.
possiblepoints
Points possible
The original total.
extra possiblepoints
Extra 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.