= Write My Formula

Excel formula cheat sheet

Excel formula cheat sheet for the formulas people actually use.

Use this reference to pick the right formula pattern, then describe your exact sheet and let the workbench turn it into a copy-ready formula.

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Purpose-built inputs

A focused workflow for everyday spreadsheet work.

Structured formula builder

Task, table context, target range, and function hint keep the request specific.

Write / Explain / Fix modes

Generate a new formula, translate a pasted one, or diagnose common syntax issues.

Excel and Sheets toggle

Compatibility notes call out modern functions and platform-specific behavior.

Formula-bar output

The result is formatted for scanning and placed next to a copy button.

Common formulas

Pick the formula you came for.

Percentage formulas

Build percent of total, percent change, discount, markup, tax, tip, and completion-rate formulas.

Date formulas

Create due dates, workday counts, month-end dates, date differences, and overdue checks.

FILTER formulas

Return matching rows for status, region, date, text, and threshold conditions.

Text formulas

Split, extract, join, trim, clean, and replace text from messy imported cells.

Data validation formulas

Block bad IDs, duplicate values, missing fields, and invalid entries with custom TRUE/FALSE rules.

XLOOKUP formulas

Return matching values with separate lookup and return ranges.

INDEX MATCH formulas

Build flexible lookup formulas for left lookups, two-way lookups, and older Excel files.

SUMIFS formulas

Total rows that match status, date, category, customer, or region rules.

Use case

Excel formula cheat sheet for spreadsheet work.

Help spreadsheet users choose between common Excel formula patterns before generating the exact formula for their workbook.

What this page gives you

  • A compact reference for common Excel formula jobs and the function patterns that fit them.
  • Worked examples for lookup, summary, text cleanup, date, percentage, and validation formulas.
  • A path from generic cheat-sheet syntax into a formula generated for your exact columns.

When to use it

Use this page when you are not sure whether the job needs XLOOKUP, INDEX MATCH, SUMIFS, COUNTIFS, IF, FILTER, TEXTAFTER, WORKDAY, or another common formula. Start with the pattern, then generate the version that fits your actual sheet.

Do not paste a cheat-sheet formula blindly into an important workbook. Generic examples rarely match your exact ranges, locked references, locale separators, or blank-cell behavior.

Worked example

For invoice dates in A, status in B, and amounts in C, a common cheat-sheet pattern is SUMIFS for paid invoices in a date window.

=SUMIFS(C2:C500,B2:B500,"Paid",A2:A500,">="&DATE(2026,5,1),A2:A500,"<"&DATE(2026,6,1))

The formula totals amounts only when the row is marked Paid and the invoice date falls inside May 2026.

Check before you paste

  • Cheat-sheet examples use generic ranges, so adapt them before pasting into a live workbook.
  • Lock ranges with dollar signs when a formula will be copied down a column.
  • Test one known row before replacing formulas across a report.

Upgrade when the work piles up

Keep going when the sheet gets complicated.

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