Excel Formula Explainer & Builder

The problem

Writing complex spreadsheet formulas is error-prone and time-consuming. Most users know what they want to achieve but struggle with nested logic, correct syntax, and debugging broken references.

What it does

• Converts plain-English descriptions into ready-to-use Excel and Google Sheets formulas.
• Deconstructs existing, complex formulas into simple, piece-by-piece explanations.
• Identifies and fixes errors in broken formulas provided by the user.
• Provides comparative syntax for functions that differ between Excel and Google Sheets.
• Generates realistic data examples to verify formula logic before implementation.

Frameworks & tools

Microsoft Excel (including Office 365 dynamic arrays) and Google Sheets.

Why this beats prompting it yourself

Standard LLMs often provide formulas without explaining the "why," leading to maintenance headaches when data ranges change. This skill enforces a structured breakdown of every argument and proactively warns you about common pitfalls like absolute vs. relative reference errors.

Use cases

• Creating advanced lookups using XLOOKUP or INDEX/MATCH across multiple criteria.
• Building complex conditional logic for automated reporting and dashboards.
• Cleaning messy data using text manipulation and dynamic array functions.
• Debugging inherited spreadsheets with massive, undocumented formulas.

Known limitations

Does not write VBA macros or Google Apps Script. Focuses strictly on native cell formulas and dynamic arrays.