Excel Data Analysis

Broadly, getting something useful out of a spreadsheet: summarising it, finding patterns, producing figures someone will act on. The part usually left out is verifying that what the sheet already calculates is correct, which matters because most of the numbers in a working file were produced by formulas somebody wrote in a hurry.

Yes, for one workbook. Large files, several related workbooks in a single pass, and keeping the check so next month's version is treated identically are what the paid plans add.

The ones that produce a plausible number rather than an error: a total whose range no longer covers the rows underneath it, one cell in a column calculated differently from the rest, a summary figure that does not match the detail it claims to summarise, a reference pointing at a sheet that has since been rearranged. It will not claim to have found everything — no check can — but these are the ones that get through.

Not without you. Your workbook returns with findings written in alongside, so you can see each one in place and act on it. Nothing is silently rewritten — an automated fix nobody reviewed is exactly the failure this page exists to catch.

That one is for when you have data and want to know what it says: upload, ask in plain English, get computed answers and charts back. This is for when you already have a workbook full of calculations and need to know whether to trust them. If the question is about the data, start with the AI Data Analysis Tool; if it is about the sheet, you are in the right place — and the checks you settle on here carry to next month's file rather than being specified again.