Excel Formula Checker
What to look for beyond visible error values: broken references, formula drift, hard-coded overrides, lookup risks, circular references, and suspicious totals.
Read the formula guidePractical ways to audit an Excel workbook.
Spreadsheet problems are often quiet: a copied formula changes once, a value replaces a formula, a hidden sheet feeds a total, or a lookup returns a plausible result from the wrong row. These guides focus on the checks that help you find those problems before you rely on the workbook.
Spreadsheet Audit Checklist
A repeatable 12-point review covering formulas, dependencies, hidden content, calculation mode, data quality, and workbook controls.
Use the audit checklistPrefer an automated first pass?
Spreadsheet Checkup can scan .xlsx and .xlsm files for many of the same structural risks described in these guides. It does not recalculate Excel or prove that business logic is correct, but it can narrow a manual review to the cells and workbook structures that deserve attention.
Check a spreadsheet