Quick answer
The HSTACK formula combines ranges horizontally into one wider array.
=HSTACK(A2:B100,D2:E100)Syntax
Use this syntax as the pattern, then replace the sample arguments with your own cells, ranges, and criteria.
=HSTACK(array1, [array2], ...)When to use it
Lookup formulas connect tables together. Dynamic array formulas go further by returning lists, tables, and spill ranges that update automatically when the source data changes.
- Return a price from a product table
- Find an employee name from an ID
- Filter open orders into a report
- Create sorted or unique lists
Example worksheet layout
Test the formula in a small worksheet first. This makes it easier to confirm the result before copying the formula down hundreds of rows.
| Column or range | What it represents |
|---|---|
| A | Lookup value such as SKU, ID, or name |
| F:G | Reference table with the match column and return column |
| B | Returned result |
Copy-paste examples
These examples move from simple to more practical versions. Start with the beginner examples, confirm the result, then adapt the intermediate and advanced versions.
Combine two side-by-side ranges
=HSTACK(A2:B100,D2:E100)Create one wider table from separate blocks.
Add a calculated column next to data
=HSTACK(A2:C100,D2:D100*10%)Append a calculated result to the original data.
Stack selected columns
=HSTACK(CHOOSECOLS(A2:F100,1,2),CHOOSECOLS(A2:F100,6))Build a custom output table.
HSTACK with labels
=VSTACK({"Name","Amount","Status"},HSTACK(A2:B100,D2:D100))Add a header row to the combined output.
Combine filtered columns
=HSTACK(FILTER(A2:A100,D2:D100="Open"),FILTER(C2:C100,D2:D100="Open"))Join filtered columns into one report.
Safe horizontal stack
=IFERROR(HSTACK(A2:B100,D2:E100),"Check ranges")Return a readable message if ranges are incompatible.
How to use it step by step
- Put your raw data in clear columns with headers such as Amount, Date, Status, Region, or Customer.
- Paste the starting formula into the first result cell, usually row 2.
- Replace sample references such as A2, B2, or $F$2:$F$100 with the cells in your own worksheet.
- Check the result on a few rows where you already know the expected answer.
- Copy the formula down only after the first row returns the right result.
Common mistakes and fixes
- The spill area is blocked by existing values below or to the right of the formula cell.
- The source ranges do not have compatible row or column sizes.
- The formula returns an empty result because no rows match the condition.
- Test the formula on a few known rows before using it across a full report.
Beginner tips
- Use a small sample first so you can see exactly how the HSTACK formula behaves.
- Convert your source range into an Excel Table when the data will grow over time.
- Add a short note near important formulas so future users know what each input represents.