Final Grade Calculator
Stop guessing before the exam — see the exact mark you need to hit your target.
Work out the mark you need on your final exam to reach the overall grade you want. Enter your current mark, how much the final is worth, and your target — the calculator solves the weighted average backwards and flags the moment a target is already locked in or simply out of reach.
Estimates from your current mark, the exam's weight and your target — a planning guide only. Always check your unit or subject outline for the official weightings and pass rules.
How the mark you need is worked out
Work backwards from the weighted average
Your overall grade is a weighted average of two things: the work you've already done and the final exam. The completed work is worth (100 − final weight)% of the grade, so it has already 'banked' a contribution equal to your current mark × that share. The exam has to cover whatever gap is left between your target and what's banked. Rearranging the average to solve for the exam mark gives: needed = (target − current × (100 − final weight)/100) ÷ (final weight/100). In plain terms — subtract what you've banked from your target, then divide by the exam's weight to see how hard the final has to work.
Worked example
Say you have 75% so far, the final is worth 40%, and you want 70% overall. Your completed work is worth 60% of the grade, so it banks 75 × 0.60 = 45%. You still need 25 more percentage points, and a 40%-weighted exam has to supply them: 25 ÷ 0.40 = 62.5% needed on the exam. Lower your target to a 50% pass and the same banked 45% means you'd only need (50 − 45) ÷ 0.40 = 12.5% on the final.
Check your unit outline. This assumes a clean weighted average. Some subjects round marks, cap the exam contribution, or set a minimum exam mark (a 'hurdle') you must clear to pass no matter your overall percentage. The official rules always override this estimate.
Why the exam's weight changes everything
The final's weight decides how much leverage it has over your grade — and that cuts both ways. The lighter the exam, the more extreme the mark it has to carry to move the overall figure:
- Light final (10–20%) — the exam barely moves the needle. Most of your grade is already banked, so a target much above your current mark quickly becomes impossible, while a target below it is locked in early. Every point you want to shift the overall grade needs five to ten points on a 10–20% exam.
- Medium final (30–40%) — a familiar balance. The exam can lift or drop your grade by a meaningful amount, but your semester's work still anchors most of it.
- Heavy final (50%+) — the exam has real power. The same target now needs a far less extreme mark, so a big final is your best chance to rescue a grade — and your biggest risk to a good one.
That's the intuition behind the formula: dividing by (final weight/100) is what turns a small weight into a big required mark. If a target looks impossible, a heavier-weighted assessment — where one exists — is the only thing that makes it reachable.
Already secured, or out of reach
When the target is already secured
If the needed mark comes out at 0% or below, you've already locked in your target — even a blank exam paper leaves you at or above the grade you wanted. That happens when your banked contribution alone already meets the target. It's worth knowing: it tells you exactly how much pressure is (or isn't) on the exam, and where a strong result would simply be a bonus rather than a rescue.
When it's out of reach
If the needed mark works out above 100%, the target is not achievable from this exam alone — even a perfect paper can't lift your overall grade that high, because too little of the grade is still riding on the final. The honest move is to reset your target to the best mark you can actually reach, then check whether your unit offers a resit, supplementary exam or grade review. Knowing a target is impossible early is far better than finding out on results day.
Aim where the effort pays off
Run each of your subjects through the tool. The ones where a realistic exam mark still moves the grade are where your study hours earn the most; the ones already secured or already lost need less of your time. That triage is the real value of knowing the number before you sit down.
❓ Frequently asked Frequently asked questions
What mark do I need on my final exam?
Work backwards from your target. Your completed work is worth (100 − final weight)% of the grade and has already 'banked' a contribution equal to your current mark × that share. The exam has to cover the gap between your target and what's banked. So the mark you need is: needed = (target − current × (100 − final weight)/100) ÷ (final weight/100). Example: with 75% so far, a final worth 40% and a target of 70%, your work has banked 75 × 0.60 = 45%, you still need 25 more, and a 40%-weighted exam has to supply it — so you need 25 ÷ 0.40 = 62.5% on the exam.
What do I need to pass?
Set your target to the pass mark — 50% in most Australian units — and read the result. With 75% banked on work worth 60% of the grade, you've already banked 45 percentage points, so to reach 50% overall you only need (50 − 45) ÷ 0.40 = 12.5% on the final. Check your unit outline, though: some subjects also set a minimum exam mark (a 'hurdle') you must reach to pass regardless of your overall percentage.
How is the final grade calculated?
Your overall grade is a weighted average. The work already graded contributes current mark × (100 − final weight)/100, and the exam contributes exam mark × (final weight)/100. Add the two and you have the overall percentage. This calculator rearranges that formula to solve for the exam mark that lands you on your chosen target.
What if my target isn't achievable?
If the needed exam mark works out above 100%, the tool shows 'Not achievable' — even a perfect exam can't lift your overall grade that high, because too little of the grade is left riding on the final. The fix is to aim at a lower target you can still reach, or to check whether any resit, supplementary exam or grade review is offered by your unit. If the needed mark is 0% or below, the target is 'Already secured' — you've locked it in no matter how the exam goes.
How does the exam's weight affect what I need?
The lighter the exam, the more extreme the mark it has to carry. If the final is worth only 20% of the grade, every point you want to move the overall figure needs five points on the exam, so ambitious targets quickly become impossible and modest ones are locked in early. A heavier exam — say 50% — gives the final more leverage, so the same target needs a less extreme mark. That's why a big-weight final is both your best chance to lift a grade and your biggest risk to a banked one.
The method behind the number
There's nothing country-specific here — it's the standard weighted-average grade used across Australian schools, TAFEs and universities, rearranged to solve for the one mark you don't yet have.
- Overall grade — current mark × (100 − final weight)/100 + exam mark × (final weight)/100.
- Mark needed on the final — (target − current × (100 − final weight)/100) ÷ (final weight/100).
- Already secured — the needed mark is 0% or below; the banked contribution alone meets the target.
- Not achievable — the needed mark is above 100%; even a perfect exam can't reach the target from the weight that's left.
Last checked: July 2026. This is a planning estimate, not an official result. Real grading can involve rounding, scaling, capped components or a minimum-mark hurdle on the exam — your unit or subject outline is the authority, and its rules override anything shown here.
Select the question that matches where you are right now.
The headline number is the mark you need on the final exam to finish on your target overall grade. If it reads 'Already secured' the target is locked in whatever happens; if it reads 'Not achievable' even a perfect paper falls short.
Treat it as the bar to clear. If it's a mark you can realistically hit, plan your study around it; if it's uncomfortably high, that's your early warning to change target or ask about your options now, not later.
It's not your official result and it ignores rounding, scaling and any minimum-mark hurdle on the exam. It assumes a clean weighted average — always confirm the real rules in your unit or subject outline.
A very high or negative required mark usually means the exam is lightly weighted. With little of the grade left on the final, small targets are locked in and big ones become impossible.
Three inputs decide the answer: your current mark, the exam's weight, and the target you set.
Your banked contribution is current mark × (100 − final weight)/100. A strong semester and a light final mean most of the grade is already decided before you sit the exam.
Dividing by (final weight/100) is the lever. A 20% final needs five points per point of target movement; a 50% final needs only two, so the same goal asks for a far less extreme mark.
A pass (50%), a credit, a distinction — each sets a different bar. Try a few targets to see which are already secured, which are realistic, and which are out of reach, then aim your effort accordingly.
A few habits keep the number honest and useful.
Copy the exact percentages from your unit or subject outline, not a guess. Even a 5% difference in the final's weight can noticeably change the mark you need.
Some subjects require a minimum exam mark to pass regardless of your overall percentage. If yours does, treat that hurdle as your real floor even when the overall maths says less.
Do this across your whole load. It shows where study hours actually move a grade and where a subject is already settled — the fastest way to prioritise a busy exam period.
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