ISNA
Supported, behaves as documentedCategory: Information · Last tested 2026-09-01
Real compatibility results for the ISNA function: executed in Excel for the web, Google Sheets and LibreOffice Calc, with desktop Excel behavior from Microsoft’s official documentation (we do not run desktop Excel — Excel for the web is a different application and is executed separately). Syntax and links to that documentation are below.
Support matrix
| Engine | Documented | Live-tested | Verdict |
|---|---|---|---|
| Excel (desktop) | Yes | No — documented only | n/a |
| Excel for the web | — | Yes (recalc, 2026-09-01) | Supported, behaves as documented |
| Google Sheets | Yes | Yes (Drive import, 2026-08-29) | Supported, behaves as documented |
| LibreOffice Calc | Yes | Yes (25.8.7.3, 2026-07-29) | Supported, behaves as documented |
LibreOffice version history
We executed the same test cases under each LibreOffice release to show exactly when ISNA’s support changed — not documentation claims, real results.
| LibreOffice version | Verdict | Tested |
|---|---|---|
| 24.2.0.3 | Supported, behaves as documented | 2026-08-29 |
| 24.8.7.2 | Supported, behaves as documented | 2026-08-29 |
| 25.2.0.3 | Supported, behaves as documented | 2026-08-29 |
| 25.8.7.3 | Supported, behaves as documented | 2026-07-29 |
Executed test cases
Excel for the web (executed 2026-09-01 via OneDrive recalculation)
These values come from Excel for the web, not from desktop Excel. They are two different implementations of the calculation engine, and this run measured only the web one: the corpus was uploaded to OneDrive as .xlsx, recalculated by Excel for the web on open, and downloaded again for readback. Excel for the web is a rolling service with no pinnable version, so the run is identified by its date. Where a value here disagrees with the Expected column — which is Microsoft’s documentation of the desktop product — we cannot tell you whether the web engine diverges from the desktop one or the documentation is wrong about both, because we do not run desktop Excel.
| Formula | Description | Result | Expected | Verdict |
|---|---|---|---|---|
| =ISNA(1/0) | Key distinguishing case: ISNA is FALSE for #DIV/0! -- it only recognizes #N/A specifically, per https://support.microsoft.com/en-us/office/is-functions-0f2d7971-6019-40a0-a171-f2d869135665 ('ISNA: Value refers to the #N/A error value') | False | False | Matched |
| =ISNA(NA()) | ISNA is TRUE only for #N/A, the one case where ISERR disagrees with ISERROR/ISNA | True | True | Matched |
| =ISNA("a"+1) | ISNA is FALSE for a #VALUE! error (not #N/A) | False | False | Matched |
| =ISNA(5) | A plain non-error number -> FALSE | False | False | Matched |
Google Sheets (executed 2026-08-29 via Drive import)
Google Sheets is a rolling service with no pinnable version, so this run is identified by its date. The corpus was imported to Drive as .xlsx, recalculated by Sheets, and exported back for readback.
| Formula | Description | Result | Expected | Verdict |
|---|---|---|---|---|
| =ISNA(1/0) | Key distinguishing case: ISNA is FALSE for #DIV/0! -- it only recognizes #N/A specifically, per https://support.microsoft.com/en-us/office/is-functions-0f2d7971-6019-40a0-a171-f2d869135665 ('ISNA: Value refers to the #N/A error value') | False | False | Matched |
| =ISNA(NA()) | ISNA is TRUE only for #N/A, the one case where ISERR disagrees with ISERROR/ISNA | True | True | Matched |
| =ISNA("a"+1) | ISNA is FALSE for a #VALUE! error (not #N/A) | False | False | Matched |
| =ISNA(5) | A plain non-error number -> FALSE | False | False | Matched |
LibreOffice Calc 25.8.7.3 (tested 2026-07-29)
| Formula | Description | Result | Expected | Verdict |
|---|---|---|---|---|
| =ISNA(1/0) | Key distinguishing case: ISNA is FALSE for #DIV/0! -- it only recognizes #N/A specifically, per https://support.microsoft.com/en-us/office/is-functions-0f2d7971-6019-40a0-a171-f2d869135665 ('ISNA: Value refers to the #N/A error value') | False | False | Matched |
| =ISNA(NA()) | ISNA is TRUE only for #N/A, the one case where ISERR disagrees with ISERROR/ISNA | True | True | Matched |
| =ISNA("a"+1) | ISNA is FALSE for a #VALUE! error (not #N/A) | False | False | Matched |
| =ISNA(5) | A plain non-error number -> FALSE | False | False | Matched |
Docs & syntax
- Excel (desktop): official documentation
- Google Sheets: official documentation
- LibreOffice Calc: official documentation
Where ISNA behaves differently
- ERROR.TYPE: LibreOffice returns #N/A where Excel returns 4 and 6
LibreOffice returns #N/A where Excel documents 4 and 6; executed Google Sheets returns 4 and 6 but cannot parse the intersection operator at all. Error-classification logic breaks on migration. - FILTER no match: Excel #CALC! vs LibreOffice #N/A
An empty FILTER is #CALC! in Excel but #N/A in LibreOffice, and TEXTAFTER's fallback still errors. Executed Google Sheets has no TEXTBEFORE/TEXTAFTER at all - it returns #NAME?. - Every error code LibreOffice reports as #VALUE!
Across our 2,334-case executed corpus, 272 cases in 135 functions return #VALUE! in LibreOffice Calc 25.8.7.3 where Microsoft documents #NUM! (244), #N/A (15), #DIV/0! (10) or #REF! (3). Google Sheets returns the documented code on 239 of the 249 it has a function for. Identical in all four LibreOffice builds tested. - #NUM! vs #VALUE!: Excel vs LibreOffice
Domain errors Microsoft documents as #NUM! - LN(0), SQRT(-16), out-of-range LARGE - return #VALUE! in LibreOffice. Google Sheets returns #NUM! on all 16, executed: LibreOffice is alone.