AI Excel Formula Generator 2026: 7 Free Tools That Write Formulas for You

Describe what you want in plain English, get the Excel formula. These free generators save spreadsheet hours.

## AI Excel Formula Generator 2026: 7 Free Tools That Write Formulas for You The most common Excel task is also the most painful: writing complex formulas from scratch. AI formula generators translate plain English into working Excel/Google Sheets formulas. Here are the seven that are actually free and actually good in 2026. ## The 7 Tools **1. ChatGPT free tier.** The most flexible: "give me a formula that counts unique values in column A if column B is over 100" returns a working formula plus explanation. Best for complex multi-condition logic. **2. Claude free tier.** Equally strong at formulas, often better at explaining the logic step by step and catching edge cases. **3. Excel Formula Bot (excelformulabot.com).** Purpose-built: type "extract first name from full name", get =LEFT(A1,FIND(" ",A1)-1). Free tier covers basic use. **4. SheetsGPT / Google Sheets AI.** Google's built-in AI (Gemini) in Sheets: describe the formula in a cell, press enter, get the formula. Free with your Google account. **5. Formula Generator (formulagenerator.app).** Simple English-to-formula with category filters; free tier for standard functions. **6. Microsoft Copilot in Excel.** If you have Microsoft 365, Copilot writes formulas, suggests pivot tables, and explains existing formulas. Included in the subscription. **7. Ajelix AI Excel Tools.** Free tier generates formulas and explains existing ones; good for VLOOKUP/XLOOKUP heavy work. ## Prompt Patterns That Work **Be specific about:** - Cell ranges: "column A rows 2-100" - The condition: "only if value is greater than 100" - The output: "return text, not number" **Example prompts:** - "Formula to sum column C where column A = 'Yes' and column B is a date in 2026" - "Find the second-largest value in D2:D50 and return the name in column A on the same row" ## Always Verify AI formula generators occasionally hallucinate function names or argument order. Before relying on a formula: 1. Test on a copy of your data 2. Check for #N/A, #VALUE errors on edge cases 3. For critical spreadsheets, have someone review the logic ## FAQ **Are these tools safe for sensitive data?** Do not paste customer lists or financial data into free tiers. Use Microsoft/Google built-ins or enterprise versions for sensitive work. **Can they write VBA/macros?** ChatGPT and Claude can write basic VBA; purpose-built formula bots usually only handle worksheet functions. **Which is best for a beginner?** ChatGPT or Claude - they explain what the formula does, which is how you actually learn.