Final Grade Calculator
Find the score you need on your final exam to hit a target grade.
Results update as you type.
About this calculator
A final grade calculator tells you what score you need on your final exam to reach a target overall grade, from your current grade and how much the final is worth. It rearranges the weighted-average formula: needed = (desired − current × (1 − weight)) ÷ weight, with the weights written as decimals.
For example, with an 85% current grade, a final worth 40% of the course and a target of 88%, you need (88 − 85 × 0.60) ÷ 0.40 = 92.5% on the final. If the required score comes out above 100%, the target cannot be reached with the final alone, and the calculator flags that on the "achievable?" line.
Use it during exam season to know exactly what to aim for, to check whether a desired grade is still within reach, and to decide which finals deserve the most study time based on how heavily each one is weighted.
Frequently asked questions
How is the required final score calculated?
Needed = (desired − current × (1 − weight)) ÷ weight, using weights as decimals. It solves the weighted-average equation for the final exam score.
What if I need over 100%?
If the required score exceeds 100%, the target is not reachable with this final alone. The "Achievable?" line flags that.
What does the final exam weight mean?
It is the share of your overall grade that the final is worth — 30% means the final counts for 30% and your existing work for the other 70%. A heavier final can swing your grade more, for better or worse.
What grade do I need to pass the course?
Set the desired overall grade to your pass mark, such as 50% or 60%, and enter your current grade and the final’s weight. The calculator returns the minimum score the final needs to lift you to that pass mark.
Can I use this for an assignment instead of a final?
Yes. Treat any single upcoming component as the "final" and enter its weight. The weighted-average maths is the same whether the remaining item is an exam, a project or a paper.
What counts as my current grade?
It is your average across all the coursework completed so far, before the final. Enter that percentage as the current grade and the final’s weight as the remaining share, and the tool solves for the score you still need.
API — use this calculator from code
Call this calculator as a free JSON endpoint — no key required. Send the field values below as query parameters or JSON. Read the full API docs →
Endpoint
GET https://calculator.free/api/v1/final-grade/curl
curl "https://calculator.free/api/v1/final-grade/?current=82&desired=90&weight=30"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/final-grade/?" + new URLSearchParams({
"current": "82",
"desired": "90",
"weight": "30"
}));
const data = await r.json();
console.log(data.results);Results are estimates for general guidance only, not financial, medical or tax advice.