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FORMULA HELP

Find the next thing to check.

Look up a question, inspect a formula’s structure, then try a working example.

Published explanations come from 19 original troubleshooting topics. The lookup inspects structure without calculating a pasted formula. For generated advice and an explicit local trial, use the local formula assistant. Current task observations remain available inside task and function worksheets.

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Unselected columns keep literal text, including leading zeros, = signs and error-looking labels. Selected numeric columns accept plain finite numbers; their empty cells are blank.

Cell rowABC
1RegionStatusAmount
2EastPaid10
3WestPaid20
4EastPending30
5EastPaid-5

The trial writes only to J2 in a copy of these literal cells. It allows at most 144 result cells and stops a calculation that exceeds its time limit. No model suggestion is run automatically.

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Published help topic

Choose exact or threshold matching

A missing exact record and a nearest-lower quantity band require different lookup rules.

  1. For an ID, begin with exact matching and inspect numeric/text types and spaces if the record is missing.
  2. For a band table, define whether a boundary belongs to the lower or upper band. XLOOKUP match mode -1 chooses an exact or next-smaller key.
  3. A binary search requires the documented sort order. Handle a genuine missing match with a chosen label; keep unrelated errors visible.

Reference: Microsoft: XLOOKUP

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