Weighted Grade Calculator Online

Easily calculate your final grade by entering each assignment and its weight. Add as many assignments as needed.

Tip: The sum of all weights should add up to 100% for an accurate grade.

Your Assignments

Name Score (%) Weight (%) Action
Add your first assignment above to begin.

Weighted Final Grade

— Points (out of 100)
Your result will appear here once assignments are added.

Spluxly’s free online Weighted Grade Calculator is a flexible and intuitive academic tool designed for students who need to calculate their final course grade from multiple assignments, assessments, and components that each carry a different percentage weight. Unlike a simple average that treats all scores equally, a weighted grade calculation multiplies each assignment score by its assigned weight and sums all contributions together, reflecting the true impact each component has on the overall course grade. Enter each assignment with an optional name, a percentage score (0 to 100), and a percentage weight, and the calculator instantly computes your running weighted final grade displayed prominently in points out of 100. A dynamic colour-coded bar chart visualises all assignment scores side by side for an immediate comparative view of your performance across every component. A built-in weight validation alert warns automatically if your total weights deviate from 100%, ensuring your result is always based on a correctly distributed grade structure. Add an unlimited number of assignments, remove individual entries, and export a clean single-page PDF via your browser’s print menu for academic records or submission. Completely free, no registration required.

How to Use the Weighted Grade Calculator Online

Calculating your weighted final grade takes just a few steps. Follow these simple instructions:

  • Enter Assignment Name (optional) – Type a label for the assignment or assessment component (e.g., Midterm Exam, Lab Report, Homework) to identify it clearly in your assignment table
  • Enter Score (%) – Type your percentage score for the assignment (e.g., 87) into the score field; accepted values are 0 to 100
  • Enter Weight (%) – Type the percentage weight this assignment carries in your overall course grade (e.g., 25) into the weight field
  • Click Add (or press Enter) – Add the assignment to your table; the weighted final grade updates instantly with each new entry
  • View the Updated Final Grade – See your current weighted final grade displayed in the results panel in points out of 100 after each assignment is added
  • Check the Weight Alert – If your total weights do not sum to 100%, a warning alert appears automatically reminding you to adjust weights for an accurate overall grade
  • Review the Bar Chart – See all assignment scores displayed side by side in a colour-coded bar chart for an instant visual comparison of performance across every component
  • Remove Assignments – Click the action button next to any assignment in the table to remove it; the final grade recalculates automatically
  • Export to PDF (optional) – Use your browser’s Print → Save as PDF to export a clean single-page record of your assignments, weights, scores, and final grade

How Weighted Grade Is Calculated

A weighted grade is calculated by multiplying each assignment’s percentage score by its weight as a decimal, summing all the weighted contributions, and dividing by the total of all weights to produce the final grade.

Weighted Final Grade Formula: Final Grade = Σ (Assignment Score × Assignment Weight) ÷ Σ (Assignment Weights)

When all weights sum correctly to 100%, the formula simplifies to: Final Grade = Σ (Assignment Score × (Weight ÷ 100))

Example for three components:

AssignmentScoreWeightWeighted Contribution
Homework90%20%90 × 0.20 = 18.0
Midterm Exam78%30%78 × 0.30 = 23.4
Final Exam85%50%85 × 0.50 = 42.5
Total 100%83.9 points

Final Weighted Grade = 18.0 + 23.4 + 42.5 = 83.9 / 100

What Happens if Weights Do Not Sum to 100%: If the total of all entered weights is less than or greater than 100%, the calculator still produces a result but displays a warning alert. The formula divides the total weighted points by the actual sum of weights rather than 100, which may not reflect the true course grade structure — making the alert an important accuracy check.

Why Use Spluxly’s Weighted Grade Calculator?

  • Unlimited Assignment Entries – Add as many assignment, quiz, exam, or project entries as needed with custom names, percentage scores, and individual weights for a complete and fully accurate course grade calculation
  • Real-Time Grade Updates – The weighted final grade recalculates and updates instantly with every assignment added or removed, giving you a live running total of your course standing at all times
  • Weight Validation Alert – Automatically detects when total assignment weights deviate from 100% and displays a clear warning so you can correct the distribution before relying on the result
  • Colour-Coded Bar Chart – Visualises all assignment scores in a dynamic bar chart with distinct colours for each component, making it easy to identify your strongest and weakest performance areas at a glance
  • Named Assignment Support – Optional assignment name input labels each entry clearly in the table and chart, keeping results organised and readable even when tracking a large number of individual course components
  • PDF Export Optimised – The assignment table, final grade, and bar chart are formatted for clean single-page export via the browser print menu, producing a polished record suitable for academic files or instructor review
  • 100% Free & Instant – No registration, no fees — your weighted final course grade with assignment table, visual chart, and weight validation delivered in seconds

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