COUNTBLANK
Supported, behaves as documentedCategory: Statistical · Last tested 2026-08-06
Real, executed compatibility results for the COUNTBLANK function across Microsoft Excel, Google Sheets, and LibreOffice Calc — verified by actually running it. Syntax and links to each vendor’s official documentation are below.
Support matrix
| Engine | Documented | Live-tested | Verdict |
|---|---|---|---|
| Excel | Yes | Not yet | n/a |
| Google Sheets | Yes | Not yet | n/a |
| LibreOffice Calc | Yes | Yes (25.8.7.3, 2026-08-06) | Supported, behaves as documented |
LibreOffice version history
We executed the same test cases under each LibreOffice release to show exactly when COUNTBLANK’s support changed — not documentation claims, real results.
| LibreOffice version | Verdict | Tested |
|---|---|---|
| 24.2.0.3 | Supported, behaves as documented | 2026-07-19 |
| 24.8.7.2 | Supported, behaves as documented | 2026-07-19 |
| 25.2.0.3 | Supported, behaves as documented | 2026-07-24 |
| 25.8.7.3 | Supported, behaves as documented | 2026-08-06 |
Executed test cases
LibreOffice Calc 25.8.7.3 (tested 2026-08-06)
| Formula | Description | Result | Expected | Verdict |
|---|---|---|---|---|
| =COUNTBLANK(A1:A5) | Counts genuinely empty cells in a range | 2 | 2 A2 and A4 are the blank cells |
Matched |
| =COUNTBLANK(A1:A6) | Same mixed range as COUNT/COUNTA: only the genuinely empty cells count, not the text/number/boolean cells | 2 | 2 A3 and A6 are blank |
Matched |
| =COUNTBLANK(A1:A3) | Documented cross-engine-relevant edge case: a cell containing a formula that returns "" is counted as blank by COUNTBLANK, same as a truly empty cell - even though that identical cell would be counted as non-blank by COUNTA (see COUNTA_empty_string_formula_counts). Confirmed via Microsoft's COUNTBLANK docs (https://support.microsoft.com/en-us/office/countblank-function-6a92d772-675c-4bee-b346-24af6bd3ac22): "Cells with formulas that return "" (empty text) are also counted." | 2 | 2 A1 is truly blank (not set at all) and A2's formula result of "" is ALSO counted as blank -> 2 total; only A3=5 is excluded |
Matched |
| =COUNTBLANK(A1:A1) | A cell containing the number 0 is NOT counted as blank | 0 | 0 | Matched |
Docs & syntax
- Excel: official documentation
- Google Sheets: official documentation
- LibreOffice Calc: official documentation