HSTACK Function in Apple Numbers: Syntax, Examples and Compatibility
Use HSTACK in Apple Numbers to place separate ranges side by side to create one wider array. Two original examples, expected results, cautions and official software documentation.
Verification status: Official documentation referenced; example outcomes independently reasoned or arithmetically checked where stated. Not executed in Apple Numbers. How formula examples are checked
Quick answer: place separate ranges side by side to create one wider array in Apple Numbers. The reproducible examples below use explicit values so the formula’s meaning is testable without a large workbook.
Evidence: The function name and syntax are documented in the linked vendor function reference. Expected outputs were independently reasoned or checked outside the application. These are not native Apple Numbers test results. A guide being published here does not certify every software release or file-import scenario.
Syntax and arguments
=HSTACK(array1, [array2], ...)
Supply two or more ranges. HSTACK appends each second range to the right of the first.
Best use case: Place separate ranges side by side to create one wider array.
Set up the example sheet
Enter A2=Pen, A3=Pad, C2=12, and C3=5. Keep the two-cell output region clear before entering the formulas.
Enter the formula in an unused cell. For a formula returning several values, leave an unobstructed area where those values can expand. These formulas use comma argument separators in a typical English-language locale; commas or semicolons inside quoted text are data, not argument separators. Adapt the separator if your regional settings require it.
Worked example 1: HSTACK with known input
=HSTACK(A2:A3,C2:C3)
Expected output: two rows: Pen, 12 and Pad, 5.
The left source column is placed beside the right source column.
Worked example 2: a second HSTACK case
=HSTACK(C2:C3,A2:A3)
Expected output: two rows: 12, Pen and 5, Pad.
Reversing the arguments reverses the placement of the source ranges.
Compare both results before replacing literal values or short sample ranges with your own workbook data. For a spilling formula, compare every output cell, not only the top-left result.
Practical advice and troubleshooting
When this formula helps: HSTACK is useful for assembling export-ready tables without writing back into the original cells.
Important edge case: Input arrays of unequal heights require padding; the exact padding and error-display behavior is application-dependent.
If the result differs, first verify the text-versus-number types of the input cells, the argument separators for your locale, and the range size. For dynamic arrays, inspect occupied cells in the output area. An error that looks like a missing function may reflect a software version rather than incorrect data.
Compatibility and version considerations
The current official Apple Numbers function index includes this function. Table-relative references and current Numbers versions must be checked when transferring formulas from Excel. Do not assume formatting or headers are copied into array results. HSTACK combines values and follows spill rules. The Excel/Google comparison is background only, not a claim of identical behavior in Apple Numbers.
Modern dynamic-array Excel and current Google Sheets list HSTACK; it is not a safe choice for Excel 2013.
Function availability and parameter behavior must be judged for the specific application and release; a function documented in one spreadsheet does not automatically work in another.
Application-specific source note: The current official Apple Numbers function index includes this function. Table-relative references and current Numbers versions must be checked when transferring formulas from Excel.
Formula separator: These examples use commas for the function-argument separators. Locale settings can change entry conventions.
Related guides and official documentation
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Apple Numbers documentation for HSTACK — function syntax and current vendor information.
Editorial verification: Function name checked in official vendor catalogue on 2026-10-12. The two example outputs are independently reasoned; no native application run, screenshot, or version-specific output is claimed. Review the editorial testing standards if you require stronger proof before importing a workbook.