How do I calculate a weighted grade?

Multiply each score by its weight, add the products, and divide by the sum of the weights. With weights that add to 100, that is the same as Σ(score × weight) ÷ 100.

What if my weights do not add up to 100?

The calculator divides by whatever the weights add up to, so 2, 3 and 5 work the same as 20, 30 and 50. If the syllabus weights should total 100 and yours do not, a component is probably missing.

Does the calculator round like my school does?

No. It shows two decimals and does not round to letter grades, because schools use different cut-offs and rounding rules. Check your syllabus for how a 89.5 is treated.

Can I share my calculation?

Yes. The page address updates with your scores and weights as you type; use “Copy link to this result” to send it. Component names are not included in the link.

Weighted Grade Calculator

Most courses do not average every score equally: a final exam might count for half the grade and homework for a fifth. Enter each component’s score and its weight from the syllabus. Leave the final blank and set a target to see exactly what you need on it.

Written and maintained by Ricardo Rodrigues · Last updated October 7, 2026 · What changed

Who this calculator is for

This page is for students checking where they stand in a course, for parents helping with a gradebook, and for teachers and tutors who want a transparent calculation to show a student.

If you only have one test — 42 points out of 50 — use the “X is what percent of Y” calculator. Weighting only matters when you combine several scores that count differently.

Weighted grade calculator

Enter each component’s score (%) and weight. Leave a score blank to see what you need on it.

Grade components
Component	Score %	Weight	Remove

Target final grade (%)

Weighted average of graded work

83.6%

Needed on the ungraded 50 weight to reach 85%: 86.4%

Σ(score × weight) ÷ Σ(weight)

Step-by-step for your numbers

Multiply each graded score by its weight — Homework: 92 × 20 = 1,840; Midterm: 78 × 30 = 2,340.
Add those products: 4,180. Add the weights you have scores for: 50.
Weighted average so far = 4,180 ÷ 50 = 83.6%.
To finish on 85%, the remaining 50 weight must average (85 × 100 − 4,180) ÷ 50 = 86.4%.

Comparison table

Score needed on a final worth 50%, by current average and target
Current average (other 50%)	Target 70%	Target 80%	Target 90%
60%	80%	100%	not reachable
70%	70%	90%	not reachable
80%	60%	80%	100%
90%	50%	70%	90%

With a 50/50 split, needed = 2 × target − current. Other weights change the slope; use the calculator above.

About this weighted grade

A test score percentage is one fraction: points earned over points possible. A course grade is usually several of those percentages combined with different weights. The x-is-what-percent calculator handles the first job; this page handles the second, and adds the question students ask most in the last weeks of term: what do I need on the final?

Every input is a percentage score plus a weight. Leave a score blank to mark it as not yet graded. The result shows the weighted average of what has been graded so far, and, if a target is set, the average you need across the ungraded weight. The step list shows each score × weight product so you can check it against your gradebook line by line.

How to use each field

Component: A label so you can recognise the rows: Homework, Midterm, Lab, Final. It does not affect the maths and is not included in the shareable link.
Score %: Your percentage on that component, 0–100 (more if extra credit allows). Leave it blank if it has not been graded yet; the row’s weight then counts as “remaining.”
Weight: How much the component counts, from the syllabus. Use percentages (20, 30, 50) or any proportional numbers. Rows with no weight are ignored.
Target final grade: The overall percentage you are aiming for. If any weight is ungraded, the calculator works out the average you need across it.

When to use this calculator

Your syllabus lists categories with percentages (homework 20%, midterm 30%, final 50%) and you want your current standing.
You want to know the minimum final-exam score that still gets you a target grade.
You are a teacher or tutor checking a gradebook spreadsheet against a hand calculation.

Worked examples

Example calculations for Weighted Grade
Question	Answer
Homework 92 (20%), midterm 78 (30%)	83.6% on graded work
…and you want 85% overall, final worth 50%	Need 86.4% on the final
Quizzes 70 (10%), project 95 (40%), exam 80 (50%)	85% overall

Walkthroughs

Three categories, final still to come

Quizzes 70 (weight 10), project 95 (weight 40), final exam blank (weight 50), target 85. Graded products: 700 + 3,800 = 4,500 over weight 50, so current standing is 90%.

Needed on the final: (85 × 100 − 4,500) ÷ 50 = 80%. A strong project buys room on the exam. If the target were 95, you would need 100% on the final — the calculator will flag targets that need more than 100%.

Weights that do not add to 100

Some teachers weight by points: tests 3, quizzes 1. Enter 3 and 1 as weights; the calculator divides by 4. A test average of 80 and quiz average of 60 gives (240 + 60) ÷ 4 = 75%.

The minimum score to pass

Set the target to your pass mark instead of the grade you hope for. Coursework 55 (weight 40), exam blank (weight 60), pass mark 50. Earned points: 55 × 40 = 2,200. Needed on the exam: (50 × 100 − 2,200) ÷ 60 = 2,800 ÷ 60 ≈ 46.67%.

Some courses also require a minimum on the exam itself, regardless of the overall average. If yours does, the real requirement is whichever of the two numbers is higher; the calculator only knows about the weighted total.

Formula

Goal	Formula
Weighted average	Σ(score × weight) ÷ Σ(weight)
Score needed on remaining work	(target × total weight − earned points) ÷ remaining weight

Weighted average = Σ(score × weight) ÷ Σ(weight). With homework 92 at weight 20 and midterm 78 at weight 30: 92 × 20 = 1,840 and 78 × 30 = 2,340. The sum is 4,180, over a graded weight of 50, so the current standing is 4,180 ÷ 50 = 83.6%.

Score needed = (target × total weight − points earned) ÷ remaining weight. To finish on 85% with the final worth 50: (85 × 100 − 4,180) ÷ 50 = 4,320 ÷ 50 = 86.4% on the final.

“Current standing” uses only graded components. It is the grade you would get if your future work matched your past average — not your guaranteed grade.

Mistakes this page will not catch for you

Averaging the percentages without weights

Homework 92, midterm 78, final 70 averaged plainly is 80. With weights 20/30/50 it is 18.4 + 23.4 + 35 = 76.8. If the final counts for half, it pulls the grade toward itself.

Mixing points and percentages

Enter each component as a percent score (e.g. 45 out of 60 = 75). If your course weights by raw points instead of categories, add up all points earned and divide by all points possible — that is a plain percentage, not a weighted one.

Dropped scores and curves

If your course drops the lowest quiz or curves exams, apply that to the score first, then enter the adjusted percentage. The calculator does not know your school’s policy.

FAQ

How do I calculate a weighted grade?: Multiply each score by its weight, add the products, and divide by the sum of the weights. With weights that add to 100, that is the same as Σ(score × weight) ÷ 100.
What if my weights do not add up to 100?: The calculator divides by whatever the weights add up to, so 2, 3 and 5 work the same as 20, 30 and 50. If the syllabus weights should total 100 and yours do not, a component is probably missing.
Does the calculator round like my school does?: No. It shows two decimals and does not round to letter grades, because schools use different cut-offs and rounding rules. Check your syllabus for how a 89.5 is treated.
Can I share my calculation?: Yes. The page address updates with your scores and weights as you type; use “Copy link to this result” to send it. Component names are not included in the link.