Grade Calculator Staring down a final exam and doing nervous math in your head? Stop guessing. Tell this calculator three numbers — your current grade, the grade you want, and how much the final is worth — and it will tell you exactly what score you need to walk out with.
Maybe you need an 82% to keep your B. Maybe you only need a 40% to pass (hello, relief). Or maybe the math says it’s out of reach — in which case, better to know now so you can talk to your teacher about extra credit instead of finding out later.
Final Exam Calculator
🎯 Quest toolTell us where you stand and your goal — we'll crunch the final you need.
You need on the final
How the math works
Your final grade is a weighted average: your current grade counts for everything except the final, and the final counts for its weight. Flip that around and the score you need is:
Needed = (Desired − Current × (1 − Weight)) ÷ Weight
So if you have an 85%, want a 90%, and the final is worth 30%: (90 − 85 × 0.70) ÷ 0.30 = 101.7%. Ouch — that’s the “aim for extra credit” scenario. The calculator does all of this instantly, no algebra required.
Play with the what-if slider
Below the answer, drag the “what-if” slider to any final-exam score and watch your overall grade update live. It’s the fastest way to answer questions like “what if I totally bomb it?” (spoiler: usually less catastrophic than you think) or “what if I actually study this time?”
Make it a quest, not a worry
Once you know your number, turn it into a plan: set your goal in our grade calculator and it will tell you exactly what to score on your remaining work. Students who know their target study smarter — now you’re one of them.
Frequently asked questions
What if I need more than 100% on the final?
Then the final alone can’t get you there. Talk to your teacher now about extra credit, corrections, or dropped assignments — and use the grade calculator with the “drop lowest” power-up to see how much that helps.
What if I need less than 0%?
Congratulations — you’ve already locked in your goal. You could skip the final entirely (but maybe still show up).
Does this work for weighted classes?
The math is the same; just make sure the “current grade” you enter already reflects your class weights. For AP, Honors, and IB courses, try our weighted GPA calculator.
Related tools: GPA calculator · Grade % calculator · Grade calculator