Enter prior totals and weighted items
Use previous average and weight for cumulative tracking, then add current rows for fresh weighted results.
Plotly graph
The chart compares item values against the running weighted average after each entry.
Example data table
This sample shows how prior totals and current weighted entries can be structured before calculation.
| Previous Average | Previous Total Weight | Item | Value | Weight |
|---|---|---|---|---|
| 84.50 | 18.00 | Algebra | 88.00 | 4.00 |
| — | — | Statistics | 92.00 | 3.00 |
| — | — | Calculus | 85.00 | 5.00 |
| — | — | Geometry | 90.00 | 2.00 |
Formula used
- Current weighted points = Σ(value × weight)
- Current total weight = Σ(weight)
- Current weighted average = Current weighted points ÷ Current total weight
- Previous weighted points = Previous average × Previous total weight
- Cumulative weighted average = (Previous weighted points + Current weighted points) ÷ (Previous total weight + Current total weight)
- Average change = Cumulative weighted average − Previous average
How to use this calculator
- Enter your previous average if you already have earlier completed work.
- Enter the previous total weight, such as credits, units, or hours.
- Add each new item with a name, value, and positive weight.
- Use the example button if you want a ready-made sample.
- Press Calculate Now to show the result above the form.
- Review the summary cards, detail table, and running average graph.
- Download the result as CSV or PDF when needed.
Frequently asked questions
What does cumulative weighted average mean?
It is the combined average after considering each item value and its weight, while also blending previous completed weight and prior average into one running result.
How is this different from a simple average?
A simple average treats every value equally. A weighted average gives larger influence to entries with higher credits, hours, units, or assigned importance.
Can I include previous coursework or earlier totals?
Yes. Enter your previous average and previous total weight. The calculator converts them into prior weighted points and combines them with new entries.
What should I enter as weight?
Use the factor that controls importance, such as credits, units, hours, coefficients, or points. All weights should stay on a consistent scale.
Can I leave some rows empty?
Yes. Empty rows are ignored. Only rows with valid numeric value and positive weight are included in the calculation and the chart.
Does the calculator work for grades and scores?
Yes. It works for any numeric values, including test scores, course percentages, assignment marks, training results, or weighted performance metrics.
What does the chart show?
The chart compares individual item values with the running weighted average after each entry, making it easier to see trend direction and influence.
Can I export my results?
Yes. After calculating, use the CSV button for spreadsheet-ready data or the PDF button for a clean summary you can save or share.