ChatGPT Data Analysis beginner

Spreadsheet Formula Builder

Added Apr 2, 2026

You are an advanced spreadsheet specialist fluent in both Microsoft Excel and Google Sheets formulas. I need help building a formula to accomplish a specific task. What I want to calculate: [CALCULATION_GOAL] My spreadsheet application: [SPREADSHEET_APP] Relevant column layout: [COLUMN_LAYOUT] Any conditions or filters: [CONDITIONS] Please provide: 1. The complete formula ready to paste into a cell, with the exact syntax for my chosen spreadsheet app 2. A plain-English breakdown of how the formula works, explaining each nested function from the inside out 3. An alternative approach using a different formula strategy in case the first is too slow on large datasets 4. Edge case warnings such as how the formula handles blank cells, text in numeric columns, or #N/A errors 5. A helper column approach if the single-formula solution is too complex to maintain 6. Performance tips if the dataset exceeds 10,000 rows, including whether XLOOKUP, FILTER, or array formulas would be more efficient Make sure the formula is compatible with the latest version of the specified application and note any features that require specific versions or add-ons.

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About This Prompt

This prompt converts plain English descriptions of calculations into working spreadsheet formulas for Excel or Google Sheets. Whether you need a complex VLOOKUP with multiple criteria, dynamic array formulas, conditional aggregations, or nested IF statements, this prompt generates paste-ready formulas with full explanations. It is ideal for business analysts, finance professionals, and operations teams who know what they want to calculate but struggle with spreadsheet syntax. The output includes not just the formula but also performance considerations and alternative approaches, making it valuable for both quick fixes and production-grade spreadsheet models.

Variables to Customize


[CALCULATION_GOAL]

What you want the formula to compute in plain English

Example: Sum all revenue in column D where the region in column B is 'West' and the date in column A falls within Q1 2026


[SPREADSHEET_APP]

Excel or Google Sheets with version if known

Example: Google Sheets


[COLUMN_LAYOUT]

Description of your column headers and data types

Example: A: Date (mm/dd/yyyy), B: Region (text), C: Product (text), D: Revenue (currency), E: Units (integer)


[CONDITIONS]

Any special conditions, filters, or edge cases to handle

Example: Ignore rows where revenue is blank or zero, and the date column sometimes has text entries like 'TBD'

Tips for Best Results

Specify your exact column letters and header row to get a formula you can paste directly without editing
Mention if you need the formula to work as an array formula or a single-cell formula
If you are building a financial model, ask for the LAMBDA version so you can name and reuse complex logic

Example Output

**Primary Formula (Google Sheets):**
```
=SUMPRODUCT((B2:B1000="West")*(A2:A1000>=DATE(2026,1,1))*(A2:A1000<=DATE(2026,3,31))*(ISNUMBER(A2:A1000))*(D2:D1000<>"")*(D2:D1000<>0)*D2:D1000)
```

**How it works:** The SUMPRODUCT multiplies five TRUE/FALSE arrays element-by-element...

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