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Excel IF Cell Contains Text: Formulas and Examples
Use IF with SEARCH, FIND, or COUNTIF to test whether an Excel cell contains text, with case-sensitive, multi-word, and blank-input examples....
Weighted Average in Excel: Formula and Examples
Calculate a weighted average in Excel with SUMPRODUCT and SUM. Follow price, score, and percentage examples, and handle zero weights and missing values....
How to Count Unique Values in Excel
Count unique values in Excel, ignore blanks, count values that appear once, and add criteria. Includes modern formulas and an older Excel alternative....
How to Make a Gantt Chart in Excel
Make a Gantt chart in Excel with start dates and durations. Follow a five-task example, fix date-axis settings, and download the sample workbook....
Compound Interest Formula in Excel (With Annual and Monthly Examples)
Calculate compound interest in Excel with annual and monthly formulas, the FV function, a frequency comparison, and a downloadable example workbook....
How to Insert a Check Mark in Excel (5 Easy Methods)
Insert an Excel check mark with copy and paste, Symbol, a Windows shortcut, formulas, or conditional formatting. Learn when to use a checkbox instead....
How to Change Case in Excel: Uppercase, Lowercase, and Proper Case
Learn how to change case in Excel with UPPER, LOWER, PROPER, Flash Fill, and Paste Special so you can safely replace text values....
Compare Two Columns in Excel
Learn how to compare two columns in Excel for matches, differences, duplicates, missing values, and case-sensitive text....
How to Find and Fix Circular References in Excel
Learn how to find a circular reference in Excel, trace the formula loop, fix common circular reference errors, and handle intentional iterative formulas....
How to Calculate Percentage Change in Excel
Learn the percentage change formula in Excel, including examples for increases, decreases, percentage formatting, and avoiding divide-by-zero errors....
The Karpathy Loop for Excel: How Autoresearch Changes the Way We Optimize Spreadsheets
Learn how Karpathy's autoresearch pattern — the AI experiment loop that ran 700 tests in two days — applies to Excel formula optimization, VBA macros, and AI-assisted spreadsheet workflows....
Claude for Excel Review: Best for Complex Models and Error Tracing?
Review Claude for Excel for complex models, error tracing, and careful workbook analysis, including the limits that still matter in beta....
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