Calculated Table Power BI Calculator

Calculator Form

Source Table Name

Calculated Table Name

Calculation Mode

Source Rows

Rows Kept After Filter (%)

Gross Total

Quantity Total

Discount Rate (%)

Tax Rate (%)

Scale Multiplier

Estimated Bytes Per Row

Compression Saving (%)

Relationship Count

Decimal Places

Filter Label

Formula Used

The calculator follows table planning formulas used before creating calculated tables.

Kept Rows = Source Rows × Rows Kept Percentage
Removed Rows = Source Rows − Kept Rows
Filtered Gross = Gross Total × Scale Multiplier × Rows Kept Percentage
Discount Amount = Filtered Gross × Discount Rate
Net Amount = Filtered Gross − Discount Amount
Tax Amount = Net Amount × Tax Rate
Grand Total = Net Amount + Tax Amount
Average Per Row = Grand Total ÷ Kept Rows
Average Per Unit = Grand Total ÷ Filtered Quantity
Estimated Model Size = Compressed Row Size + Relationship Load

These formulas help test expected table size and output totals. They are useful before writing final DAX inside a report model.

How to Use This Calculator

Enter the source table name and calculated table name.
Select a calculation mode that matches your planning idea.
Add source rows, gross total, and quantity total.
Enter the expected filter percentage.
Add discount, tax, scale, and storage assumptions.
Press Calculate to view the result below the header.
Use CSV for spreadsheet review.
Use PDF for a saved summary.

Example Data Table

Scenario	Source Rows	Keep %	Gross Total	Discount %	Tax %	Expected Use
Sales active rows	50,000	65	250,000	8	5	Filtered sales model
Regional summary	18,000	40	90,000	4	3	Region level table
Product analysis	75,000	55	480,000	6	7	Product performance table

What Is a Calculated Table?

A calculated table builds a new table from existing model data. It helps analysts shape rows before visual design. In a Power BI workflow, the idea often starts with DAX. This page gives a planning calculator for that logic. It estimates filtered rows, calculated amounts, taxes, discounts, averages, and model impact. The result is not a replacement for the desktop tool. It is a fast checking space for formulas and assumptions.

Why This Calculator Helps

Calculated tables can improve reporting clarity. They can also increase model size. A small planning step prevents heavy models. Enter source row counts, filter rates, numeric totals, and business rules. The calculator returns kept rows, removed rows, net value, tax value, grand value, average row value, and an estimated storage score. These values help you decide if a calculated table is useful. They also reveal whether a measure may be better.

Using Table Math

The calculator uses simple table math. A filter percentage estimates how many rows remain. A discount percentage reduces gross value. A tax percentage adds a final adjustment. Quantity, multiplier, and row count provide scale checks. The formulas are easy to audit. They also match common report planning steps. You can test different scenarios without editing a model.

Best Practice Notes

Use calculated tables when the output supports analysis. Avoid them for every small transformation. Measures are often lighter. Query transformations can also be cleaner. Keep table names clear. Keep filters documented. Test row counts after each rule. Review relationships before publishing. A calculated table should reduce confusion, not add hidden logic.

Export and Review

Use the CSV file for spreadsheet checks. Use the PDF file for saved review notes. Share both with teammates when discussing model design. The example table shows common inputs and outcomes. Your final DAX should still be tested in the model. This calculator gives a structured preview. It makes table planning faster, clearer, and easier to explain. Before export, review each assumption. Check units, dates, and category filters. A tiny filter mistake can change totals. Save scenarios for audits. Compare draft outputs with final visuals. This habit improves trust. It also supports better maintenance when reports grow across teams and departments later.

FAQs

What does this calculator estimate?

It estimates calculated table rows, totals, discounts, taxes, averages, and model size. It helps plan table logic before building final report formulas.

Is this the same as a DAX engine?

No. It is a planning tool. It does not run a full semantic model. It gives useful math checks for expected calculated table behavior.

What is the rows kept percentage?

It is the estimated percentage of source rows that remain after filters. Use it to preview table reduction and possible model size changes.

Why include storage estimates?

Calculated tables can increase model size. Storage estimates help you decide whether a table, measure, or query transformation is better.

Can I export the results?

Yes. Use the CSV button for spreadsheet review. Use the PDF button for a simple saved report summary.

What does scale multiplier mean?

Scale multiplier adjusts gross value before filtering. It helps test growth, currency scaling, unit changes, or scenario planning assumptions.

When should I use calculated tables?

Use them when a reusable table improves analysis. Avoid them when a measure or query step gives the same result with less model weight.

Can this help with report planning?

Yes. It gives clear estimates before model editing. It also helps explain table choices to teammates and reviewers.