AI Excel Formula Generator — Plain English to Formula
You know what you want to calculate; you just can't remember whether it's SUMIFS or SUMPRODUCT and which arguments go where. Describe it in plain English and let AI write the formula — inside Excel, with your data staying on your machine.
Last updated: September 2026
| You type | You get | |
|---|---|---|
| quantity × price plus 15% tax | → | =B2*C2*1.15 |
| days between order and ship date | → | =D2-A2 |
Method 1 — a web formula generator
Sites like Excelformulabot / GPTExcel will generate a formula from a description, but you're switching tabs, pasting your column layout in by hand, then copying the formula back. Nothing knows your actual sheet, so references are guesses you have to fix.
Method 2 — the 1-click way (Tellsheet)
AI Formula Builder
Click the cell where you want the result, run AI Formula Builder, and describe the calculation. It reads your table's header row — so it references the right columns — and writes a working formula straight into the cell, ready to fill down. It uses your own Anthropic API key, and only your request and the headers are sent: your data values never leave the sheet, and there's no backend. The exact inverse of Explain Formula, which reads a formula and tells you what it does. Pairs with AI Regex Builder.
Frequently asked questions
Can AI write Excel formulas for me?
Yes — describe the calculation and AI Formula Builder writes it into the active cell.
Does it send my data?
No — only your request and the column headers; values stay on your machine.
Can I fill it down?
Yes — the formula is relative to the active cell, so drag or double-click to fill.
Do I need an API key?
Yes — you bring your own Anthropic key, so you're in control of usage and privacy.
Related Excel guides
Stop hunting for the right function
AI Formula Builder writes the Excel formula from your description — your data stays put.
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