How this is calculated
Your overall grade is a weighted average of your current grade and your final
exam score: overall = current × (1 − weight) + final × weight
Solving that for the final score you need gives:
needed = (target − current × (1 − weight)) / weight If the number
comes back above 100%, no realistic score on the final gets you there. The
calculator will tell you the highest overall grade a perfect 100% final would
still get you instead.
A note on accuracy
This assumes your "current grade" already reflects everything except the final (the most common setup). If your teacher's gradebook works differently (category weights instead of one running average, extra credit, a curve), treat this as a solid estimate and double check against your teacher's actual gradebook before you make a decision based on it.
More free tools
Semester grade calculator · GPA calculator · Weighted GPA calculator · Bring your Quizlet sets to Kaddy