Pivot & Group Summary

Group rows by a category and calculate counts, sums, averages, minimums or maximums.

CSV data

Group by column

Numeric value column

Aggregation

Group summaries can conceal variation within a group. For fair comparisons, confirm that each group covers a similar period and that the numeric column uses the same unit throughout.

Privacy and scope: processing happens in this browser tab. No file is uploaded to a GIR server by this tool. Keep your original file, verify the output before using it, and avoid loading sensitive personal data on shared devices.

These are practical analysis aids, not a substitute for checking source data, definitions, units, and sampling choices.

A practical note on Pivot & Group Summary

The question worth answering: This page is most useful when you focus on aggregating records without double-counting. Summarizing expenses by department and month from a transaction-level export. Start by recording the input source, the date or period covered, and any assumption you had to supply yourself. That makes the result easier to reproduce and helps another person understand what the output actually says.

How to use the result responsibly

Read the output alongside the inputs rather than as a stand-alone verdict. Change one assumption at a time and observe whether the conclusion changes materially. If the tool accepts a range, test more than one plausible case; if it accepts a file or pasted data, preserve an untouched copy of the original. Where the result will support a published claim or an important decision, keep a brief record of the method and source date.

A mistake specific to this kind of task

Summing a repeated account balance or subtotal field can inflate totals when the same value appears on many rows. This is why the output should be described as an estimate, diagnostic or comparison where appropriate—not as a guarantee. Avoid mixing currencies, periods, definitions or data sources merely because their labels look similar.

Independent check before acting

Confirm each row represents one transaction, choose an aggregation that fits the field, and reconcile the grand total to the source. If the result conflicts with a statement, official record, provider terms or the original dataset, investigate the difference before relying on it. The tool is intended to make a task clearer, not to replace the source system or professional advice when the consequences are material.

Reader takeaway: Keep the assumptions visible, verify the underlying evidence and use this result as one part of a reasoned decision.