Jon Muller

Fix issues caused by merged cells: sorting errors, formula problems, copy-paste failures. Learn alternatives to merged cells that work better.

Jon MullerJanuary 13

Fix Excel filter problems: missing values in filter dropdown, filter not working on all rows, duplicate values in list. Common AutoFilter issues solved.

Jon MullerJanuary 10

Solve copy-paste problems in Excel: paste options missing, formatting issues, clipboard errors, and pasting wrong values. Common causes and quick fixes.

Jon MullerJanuary 6

Fix Freeze Panes problems in Excel: wrong rows frozen, can't freeze, freezing disappears. Learn how Freeze Panes actually works and how to use it correctly.

Jon MullerJanuary 3

Solve common Excel printing problems: data cut off, wrong page breaks, tiny text, missing gridlines. Learn to control how your spreadsheets look on paper.

Jon MullerDecember 30

Fix VLOOKUP #N/A errors with this troubleshooting guide. Learn why lookups fail and how to handle missing values, text vs numbers, and other common issues.

Jon MullerDecember 27

Fix dates that won't sort chronologically, display incorrectly, or calculate wrong. Common date formatting problems and solutions for Excel date headaches.

Jon MullerDecember 23

Fix formulas that show the formula text instead of results, return wrong values, or don't update. Common causes and solutions for Excel calculation problems.

Jon MullerDecember 20

Steps to recover an Excel file that won't open, crashes on opening, or shows corruption errors. Multiple recovery methods from built-in tools to manual extraction.

Jon MullerDecember 16

Fix a sluggish Excel workbook with these proven solutions. From volatile functions to file bloat, learn what causes slow performance and how to fix it.

Jon MullerDecember 13

The core Excel spreadsheets every small business needs. Budget templates, cash flow tracking, customer lists, invoice registers, and simple financial statements you can build yourself.

Jon MullerDecember 9

Build educational spreadsheets in Excel. Gradebook templates, attendance tracking, student progress monitoring, and classroom management tools for teachers and administrators.

Jon MullerDecember 6

Excel solutions for healthcare settings. Patient appointment scheduling, compliance tracking, staffing schedules, and medical practice management spreadsheets.

Jon MullerDecember 2

Build real estate analysis tools in Excel. Property comparison spreadsheets, rental income projections, mortgage calculations, and investment ROI analysis for agents and investors.

Jon MullerNovember 29

Build inventory tracking systems in Excel. Learn formulas for stock levels, reorder points, turnover calculations, and warehouse management without expensive software.

Jon MullerNovember 25

Build project management tools in Excel. Create Gantt charts, milestone trackers, resource allocation views, and project dashboards without specialized PM software.

Jon MullerNovember 22

Track marketing campaigns, measure ROI, and manage budgets in Excel. Practical templates and formulas for marketing teams who need flexible reporting beyond their tools.

Jon MullerNovember 18

Build sales dashboards and pipeline trackers in Excel. Learn formulas for forecasting, commission calculations, and performance reporting that sales teams actually use.

Jon MullerNovember 15

Build effective HR spreadsheets for employee tracking, attendance, performance reviews, and compliance reporting. Practical templates and formulas for HR professionals.

Jon MullerNovember 11

Master the Excel skills every accountant needs. From reconciliations to financial statements, learn the formulas, techniques, and best practices for accounting workflows.

Jon MullerNovember 8

Macros record your actions and replay them. Here's how to start automating without writing code.

Jon MullerNovember 4

Excel's What-If tools help you explore possibilities without manually changing values. Here's how to use them.

Jon MullerOctober 31

Slicers make filtering data visual and intuitive. Here's how to add them to your workbooks.

Jon MullerOctober 27

Sparklines show trends at a glance without taking up much space. Here's how to use them effectively.

Jon MullerOctober 24

LET makes complex formulas readable and efficient by naming intermediate calculations. Here's how to use it.

Jon MullerOctober 20

LAMBDA lets you build reusable custom functions using only formulas. Here's how to get started.

Jon MullerOctober 17

Dynamic arrays changed how Excel formulas work. Here's how to use FILTER, SORT, UNIQUE, and the spill concept.

Jon MullerOctober 13

Pivot Tables turn raw data into insights instantly. Here's everything you need to know to use them effectively.

Jon MullerOctober 10

Power Query can replace hours of manual data cleaning with repeatable transformations. Here's how to get started.

Jon MullerOctober 6

XLOOKUP replaced VLOOKUP for good reasons. Here's a practical comparison and migration guide.

Jon MullerOctober 3

Workbooks accumulate cruft over time. Here's the systematic process for cleaning them up without breaking anything.

Jon MullerSeptember 29

Broken formulas hide in large workbooks. Here's how to find errors, trace dependencies, and fix problems systematically.

Jon MullerSeptember 26

Inherited a complex Excel file? Here's the systematic approach to understanding what it does and how it works.

Jon MullerSeptember 22

Excel Tables make formulas easier and data more maintainable. Here's the complete guide to using and managing them.

Jon MullerSeptember 19

Data validation dropdowns improve data quality but become invisible. Here's how to find and manage them across your workbook.

Jon MullerSeptember 15

Undocumented workbooks become black boxes. Here's how to make your files understandable to others — and your future self.

Jon MullerSeptember 12

External links break when source files move. Here's how to find every link and decide what to do with them.

Jon MullerSeptember 8

Conditional formatting rules multiply silently. Here's how to find, understand, and clean them up.

Jon MullerSeptember 5

Comments contain critical context but hide in cells. Here's how to surface and manage them across your workbook.

Jon MullerSeptember 1

Named ranges make formulas readable but become chaos at scale. Here's how to find, organize, and fix them.

Jon MullerAugust 29

Step-by-step process for identifying and eliminating friction in your daily Excel work.

Jon MullerAugust 25

Finance teams live in Excel. Here are the tools that make the difference between efficient and overwhelmed.

Jon MullerAugust 22

A self-assessment for Excel users who want to identify where they're losing time.

Jon MullerAugust 18

Skip the 300-shortcut lists. Here are the 25 shortcuts that make a real difference in daily work.

Jon MullerAugust 15

Stop wasting hours on tasks that should take minutes. Here are the most common Excel time sinks.

Jon MullerAugust 11

The settings, shortcuts, and tools that separate Excel power users from everyone else.

Jon MullerAugust 8

Most Excel add-ins aren't worth the money. Here's how to evaluate which ones provide real ROI.

Jon MullerAugust 4

Track where your Excel time actually goes. These three areas account for most wasted effort.

Jon MullerAugust 1

Microsoft has had 40 years to perfect Excel. Here are the obvious features they still haven't added.

Jon MullerJuly 28

What separates Excel power users from the rest? The tools they use. Here's the essential toolkit for serious spreadsheet work.

Jon MullerJuly 25

Essential SQL query patterns for Excel users who need to pull, filter, and summarize database data.

Jon MullerJuly 21

How to clean and validate Excel data before pushing it to a database to avoid errors and data quality issues.

Jon MullerJuly 18

How to create maintainable, refreshable Excel reports that pull from SQL databases without becoming a mess.

Jon MullerJuly 14

How to handle millions of rows when connecting Excel to SQL Server without crashing or waiting forever.

Jon MullerJuly 11

Configure how and when Excel refreshes data from external database connections for up-to-date reporting.

Jon MullerJuly 7

Understanding the trade-offs between Power Query and direct database connections for different Excel reporting scenarios.

Jon MullerJuly 4

Common ODBC connection problems between Excel and databases, and how to fix them.

Jon MullerJune 30

How to maintain data consistency between Excel spreadsheets and backend databases without losing your mind.

Jon MullerJune 27

Complete guide to connecting Excel to SQL Server databases, including ODBC, Power Query, VBA, and add-in approaches.

Jon MullerJune 23

Step-by-step methods for pushing Excel data changes back to SQL Server, from copy-paste to automated solutions.

Jon MullerJune 20

How to work with fiscal years that start in non-January months, including FY calculations and reporting.

Jon MullerJune 16

Multiple methods for calculating age from birthdate, from simple DATEDIF to precise year/month/day breakdowns.

Jon MullerJune 13

Build a project timeline with calculated durations, milestone tracking, and a simple Gantt chart using conditional formatting.

Jon MullerJune 9

Master custom date formats in Excel, from basic month/day/year to complex conditional formatting.

Jon MullerJune 6

How to create a robust time tracking spreadsheet with proper date/time handling for accurate hour calculations.

Jon MullerJune 2

Master the key date functions for calculating age, months between dates, workdays, and other common date math.

Jon MullerMay 30

Comparing Microsoft's date picker control, VBA solutions, ActiveX controls, and third-party add-ins for Excel date entry.

Jon MullerMay 26

Step-by-step guide to using data validation for dates, including custom rules for business date requirements.

Jon MullerMay 23

Why date entry goes wrong in Excel, from accidental text to wrong centuries, and practical solutions for each.

Jon MullerMay 19

How to work with different date formats when collaborating internationally, and avoid the confusion that breaks spreadsheets.

Jon MullerMay 16

Step-by-step guide to combining data from multiple sheets using formulas, Power Query, and the Consolidate feature.

Jon MullerMay 12

Master cross-sheet references in Excel formulas, including 3D references and common troubleshooting.

Jon MullerMay 9

How to build Excel templates with consistent sheet organization that scales across your team.

Jon MullerMay 5

Prevent accidental sheet deletion, renaming, or reordering while keeping cell editing enabled.

Jon MullerMay 2

Solutions for when your sheet tabs are cramped, hard to read, or constantly require scrolling.

Jon MullerApril 28

Best practices for organizing Excel sheet tabs so you and your colleagues can find things quickly.

Jon MullerApril 25

Complete reference for navigating between sheets using only your keyboard, plus tips for faster workflows.

Jon MullerApril 21

Multiple methods to quickly locate and jump to specific sheets in large Excel workbooks.

Jon MullerApril 18

Practical strategies for understanding, navigating, and maintaining massive Excel workbooks you didn't create.

Jon MullerApril 14

Learn the difference between hidden and very hidden sheets, why they exist, and the multiple ways to reveal them.

Jon MullerApril 11

How to locate, display, and manage comments and notes scattered throughout your spreadsheets.

Jon MullerApril 7

How to insert, manage, and troubleshoot shapes and images in Excel spreadsheets.

Jon MullerApril 4

A survival guide for taking over someone else's complex Excel file with zero documentation.

Jon MullerMarch 31

How to structure VBA projects so you can find your code six months from now.

Jon MullerMarch 28

Understanding the differences between Excel Tables and plain ranges, and choosing the right one for your data.

Jon MullerMarch 24

How to manage multiple pivot tables, keep sources consistent, and avoid refresh headaches.

Jon MullerMarch 21

How to find, organize, and maintain charts when they're scattered throughout a complex workbook.

Jon MullerMarch 17

A systematic approach to understanding complex Excel files when you're starting from zero.

Jon MullerMarch 14

An Excel Add-In that imports data directly from SQL Server databases into Excel ranges.

Jon MullerMarch 12

An Excel Add-In that shows all workbook objects in one panel — named ranges, comments, charts, and more.

Jon MullerMarch 10

Everything you need to know about named ranges — from basic creation to cleaning up the mess in inherited workbooks.

Jon MullerMarch 10

Stop hunting through modules manually. Learn faster ways to navigate VBA projects and find the code you need.

Jon MullerMarch 8

An Excel Add-In that replaces horizontal sheet tabs with a vertical panel for faster navigation.

Jon MullerMarch 6

An Excel Add-In to easily pick dates from a calendar.

Jon MullerMarch 4

The wizard fails often. Here's what works instead.

Jon MullerMarch 1

Sheet tabs are broken for modern workbooks.

Jon MullerFebruary 25

Methods to navigate workbooks with 50+ sheets.

Jon MullerFebruary 22

Excel handles dates everywhere but has no native date picker. Here's why — and what you can do about it.

Jon MullerFebruary 18

The right way to transfer data between Excel and SQL.

Jon MullerFebruary 15

Keyboard shortcuts to save time with dates.

Jon MullerFebruary 11

Find hidden sheets including very hidden ones.

Jon MullerFebruary 8

Everything about dates in Excel from serial numbers to functions.

Jon MullerFebruary 4

How to survive and thrive with large Excel workbooks.

Jon MullerFebruary 1