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Google Sheets formula guide

Google Sheets formulas for live, working spreadsheets.

For a maintainable Google Sheet, use exact lookups for IDs, SUMIFS for multiple conditions, FILTER for live views, and ARRAYFORMULA only when one rule should control a whole output column. Keep source and condition ranges aligned, leave spill areas clear, and verify imported numbers and dates are real values.

Start with

A clean source table with unique headers and consistent keys.

Use for

Live views, cross-tab lookups, conditional summaries, dates, and calculated columns.

Review

Range alignment, array spill space, data types, duplicate keys, and blank rows.

01

Lookups and conditional totals

Pull fields from a reference tab and summarize rows without copying source values into every working sheet.

02

Arrays and live working views

Return updating result sets while keeping the master table intact and the output area intentionally clear.

03

Structure the sheet around the formulas

Stable headers, protected inputs, and intentional review fields make formulas easier to maintain.

Do this with AI

Turn the rule into a formula inside the sheet.

Name the source tab, columns, destination, and missing-value behavior. Griddy can apply supported changes in Google Sheets and leave the result ready for you to inspect.

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