When a formula needs more than one condition, a lookup inside a calculation, or three layers of logic, writing it by hand is where mistakes creep in. The SheetFix AI formula builder assembles complex, multi-part Excel formulas from a plain description and returns one clean, correct result.
This is the page to use when "just SUM it" won't cut it: tiered commission rules, grading bands, price breaks by quantity, or a lookup whose result then feeds a calculation. Describe the full set of rules — "if units are over 100, price is $8; over 50, $9; otherwise $10" — and the builder produces the nested IF (or a cleaner IFS/lookup approach) that handles every case.
Real formulas often stack functions: an INDEX/MATCH wrapped in IFERROR, a SUMIFS with date boundaries, or TEXT formatting applied to a calculated value. You describe the outcome; the builder chooses how to combine the functions so you don't have to reason about argument order and parentheses.
Where a modern function makes the formula simpler and less error-prone — XLOOKUP instead of VLOOKUP, IFS instead of deeply nested IF — the builder uses it and tells you why, so your sheet stays maintainable.
The result comes with a breakdown of each part, so a formula you didn't write by hand is still one you can read, audit, and adjust.