Create Excel Formulas with AI: No More VLOOKUP Frustration

You know that moment? You’re staring at an Excel sheet, you need a formula that combines data from three worksheets - and after 20 minutes of googling, five forum threads, and three #N/A errors, you give up and just type the values in by hand.

Last week I was with a client whose controller confessed: “Dennis, every month-end close I spend more time building formulas than actually analysing the numbers.” The crazy part: she’s excellent at accounting - she’s just not an Excel pro. And this is exactly where AI is changing the rules right now.

The Excel Problem in Mid-Market Companies

Excel is the most-used tool in mid-sized businesses - and at the same time a huge time sink. Very few employees have any formal Excel training. They taught themselves the bare minimum and regularly hit walls:

• Complex nesting like IF inside IF inside VLOOKUP
• Functions you need twice a year and have to look up every single time
• Cryptic error messages with no helpful explanation
• Pivot tables that never quite show what you actually want

The result: Valuable working time flows into building formulas instead of evaluating the numbers. Worse still: out of uncertainty, people often resort to error-prone manual workarounds.

AI as Your Personal Excel Expert

Language models like ChatGPT, Claude, or the Copilot built into Microsoft 365 know practically every Excel and Google Sheets function - and can not only create them, but explain them clearly. You describe what you want to achieve in plain English, and you get the finished formula ready to paste.

The decisive advantage: you no longer need to know what the function is called. You only need to know what you want.

How It Works in Practice

Step 1: Describe your goal in simple words

Step 2: State the structure of your table (which column contains what)

Step 3: Have the formula generated - including an explanation

Step 4: Paste, test, done

My Proven Prompt Template for Excel Formulas

I’ve used this prompt for months - it works for almost any formula task:

You are my Excel expert. I need a formula.

MY TABLE:
- Column A: Customer name
- Column B: Order date
- Column C: Revenue
(adjust the columns to your table)

WHAT I WANT TO ACHIEVE:
[Describe your goal in one sentence]

Give me:
1. The finished formula to copy
2. A short explanation of what the formula does
3. What I need to watch out for (e.g. absolute references)

I use: [Excel / Google Sheets]

Example: Generate VLOOKUP or XLOOKUP

Instead of wrestling with XLOOKUP syntax, you simply write:

In Sheet1 I have an article number in column A.
In Sheet2 there are article numbers (column A) and prices (column B).
In Sheet1 column B I want to show the matching price from Sheet2.
Which formula do I need in Excel?

The AI delivers the right XLOOKUP or VLOOKUP formula - and explains right away why XLOOKUP is the more modern and robust choice.

Example: Understand Pivot Tables

Pivot tables are powerful but intimidating. Have the setup explained to you:

I have a table with columns: Date, Region, Product, Revenue.
I want a pivot table that shows total revenue per region and product.
Explain step by step which fields I need to drag where.

Example: Decipher Existing Formulas

Sometimes you inherit a sheet with a 200-character formula and no idea what it does. Just paste it into the AI:

Explain in simple words what this Excel formula does:
=IFERROR(INDEX(B:B,MATCH(1,(A:A=E1)*(C:C="active"),0)),"not found")

What You Should Watch Out For

Describe the table structure clearly: The more precisely you state columns and contents, the more accurate the formula. “Column with date” often isn’t enough - say “column B, format DD/MM/YYYY”.

Always test formulas: AI makes mistakes, especially when choosing between column and row references. Check the result against a few known values.

German vs. English: The German Excel version uses SVERWEIS, the English one VLOOKUP. Tell the AI explicitly which language version you have - otherwise you’ll get function names Excel doesn’t recognise.

No sensitive data: Describe the structure of your table, but don’t paste real customer data into public AI tools. The schema alone is plenty for the formula.

Regional separators: The German Excel version often uses ; instead of , as the argument separator. Mention this if the generated formula doesn’t work directly.

Checklist: Creating Excel Formulas with AI

• Phrase the goal in one clear sentence
• State the table structure (which column contains what)
• Name the language version (German or English Excel)
• State the tool (Excel or Google Sheets)
• Paste the formula and test against sample values
• On errors: copy the error message back into the AI
• Read the explanation to learn for next time

Quick Win for Today

Try this in 5 minutes: Open the spreadsheet you used most recently. Pick a task you’ve handled manually so far - like looking up values from another table or summing numbers by category. Copy my prompt template above, describe your columns, and have the formula built. You’ll be surprised how fast it goes.

A pleasant side effect: because the AI explains its formulas, you learn a little more with every prompt - and eventually need it less often.

When Spreadsheet Frustration Should Become a System

Building individual formulas with AI is a great quick win. But if entire processes in your company depend on error-prone Excel sheets - monthly reports, quote calculations, inventory lists - then there’s often more to gain than just the next formula.

We help mid-market companies automate such manual spreadsheet workflows or migrate them into robust systems. Feel free to take a look at our services or learn more at aisuccessful.com.

Try the prompts above first - in the next newsletter I’ll show you how to evaluate PDF documents like contracts and invoices with AI in seconds.

Best regards
Dennis