Final grade calculator

How to use the final grade calculator

1. Current grade. Type the percentage you have in the class right now, before the final. Your school portal or syllabus usually shows it.
2. Grade you want. Type the overall percentage you are aiming for, or tap a letter to fill it in.
3. Weight of the final. Type how much of the class grade the final exam counts for. It is in your syllabus, often between 10% and 30%.

The calculator shows the score you need on the final. It also shows where your class grade lands for a range of final exam scores, so you can see how much room you have.

Want the method step by step, with spreadsheet formulas? Read the guide: how to calculate your final grade.

Final grade formula

Your class grade is a weighted average of two parts: everything before the final, and the final itself. Turn that around and you get the score you need.

Needed final score = (Target grade − Current grade × (100% − Final weight)) ÷ Final weight

Worked example

You have 84% in the class. You want to finish with 90%. The final is worth 25% of the grade.

• Everything before the final counts for 100% − 25% = 75%.
• Points already earned: 84 × 0.75 = 63.
• Points still needed: 90 − 63 = 27.
• Score needed on the final: 27 ÷ 0.25 = 108%.

108% is above a perfect score, so a 90% is out of reach without extra credit. With a perfect final you would finish at 88%. If you aim for 85% instead, you need 88% on the final.

What score do I need on the final?

This table uses a final worth 20% of the grade. Find your current grade on the left and read across to the grade you want.

Current grade	To finish with 90%	To finish with 80%	To finish with 70%
95%	70%	20%	0%
90%	90%	40%	0%
85%	110%	60%	10%
80%	130%	80%	30%
75%	150%	100%	50%
70%	170%	120%	70%

Any number above 100% means that grade is not reachable with the final alone.

Things that change the answer

• Missing assignments. If work is still ungraded, your current grade is not final yet. Ask your teacher what the grade will be once everything is entered.
• Points instead of percentages. Some classes add up points. Divide the final exam points by the total points in the class to get the weight of the final.
• Dropped or replaced scores. Some teachers let the final replace your lowest test. That changes your current grade, so recalculate it first.
• Rounding. Many schools round 89.5% up to 90%. Check the syllabus before you count on it.

If your class has several weighted categories, use the weighted grade calculator to work out your current grade first. For a grade built from quarters and an exam, use the semester grade calculator. To see how long you have left to study, count the days between dates.

How this calculator was checked

Built by Rasel Hakkani, WordPress developer at Swift Web Dev. The formula, the worked example and every figure in the table were checked by hand before this page went up.

Last checked: October 2026. Found a wrong answer? Tell us and we will fix it.