A formula that returns #REF! or #N/A is rarely a typo you can spot at a glance. Paste your broken formula into SheetFix AI and it tells you exactly what went wrong and hands back a working version — no trial-and-error edits.
Each spreadsheet error means something specific: #REF! points to a deleted or out-of-bounds reference, #VALUE! to a data-type mismatch (often text where a number belongs), #N/A to a lookup that found nothing, #DIV/0! to dividing by an empty or zero cell, and #NAME? to a misspelled function or a missing range name. SheetFix AI diagnoses which of these you're hitting and why, then rewrites the formula to resolve it.
Sometimes the right fix isn't changing the logic but catching the error gracefully — for example wrapping a lookup in IFERROR so an empty result shows a blank or a label instead of a red error. The fixer applies that pattern where it makes the sheet more robust, and explains the trade-off.
Spreadsheets you didn't build are the worst to debug. Paste a sprawling nested formula and SheetFix AI explains what it's trying to do in plain English before fixing it, so you actually understand the file you've taken over.
Tell it which one you're using and it accounts for the syntax differences between them.