MROUND
Quirk foundCategory: Math and trigonometry · Last tested 2026-09-01
Real compatibility results for the MROUND 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) | Quirk found |
LibreOffice version history
We executed the same test cases under each LibreOffice release to show exactly when MROUND’s support changed — not documentation claims, real results.
| LibreOffice version | Verdict | Tested |
|---|---|---|
| 24.2.0.3 | Quirk found | 2026-08-29 |
| 24.8.7.2 | Quirk found | 2026-08-29 |
| 25.2.0.3 | Quirk found | 2026-08-29 |
| 25.8.7.3 | Quirk found | 2026-07-29 |
Why isn't MROUND working in LibreOffice?
MROUND exists in LibreOffice 25.8.7.3, but it is not a drop-in match for
Excel — our executed tests found real behavioral differences (detailed in the test results on this
page). If a formula that works in Excel or Google Sheets misbehaves in LibreOffice, compare your usage
against the failing cases above before assuming your data is wrong.
Discovered quirks
-
=MROUND(5,-2) on
LibreOffice Calc returned
6, but the documented/expected
result is #NUM!.
Provenance
MISMATCH vs expected: expected '#NUM!', got 6
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 |
|---|---|---|---|---|
| =MROUND(10,3) | Rounds 10 to the nearest multiple of 3. Source: https://support.microsoft.com/en-us/office/mround-function-c299c3b0-15a5-426d-aa4b-d2d5b3baf427 (worked example) | 9 | 9 | Matched |
| =MROUND(-10,-3) | Both arguments negative (same sign, as required) -> rounds to nearest multiple, sign preserved. Source: Microsoft MROUND docs worked example. | -9 | -9 | Matched |
| =MROUND(1.3,0.2) | Rounds 1.3 to the nearest multiple of the fractional value 0.2. Source: Microsoft MROUND docs worked example. | 1.4000000000000001 | 1.4000000000000001ProvenanceMicrosoft's documented example rounds this to 1.4; true IEEE-754 double nearest value is 1.4000000000000001 (0.2*7), same well-known binary-float representation issue as ROUND(1.005,2) elsewhere in this corpus. |
Matched |
| =MROUND(5,-2) | Number and multiple must have the same sign, per Microsoft docs: 'The Number and Multiple arguments must have the same sign. If not, a #NUM error is returned.' | #NUM! | #NUM! | Matched |
| =MROUND(0,5) | Zero rounds to zero regardless of the multiple. | 0 | 0 | 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 |
|---|---|---|---|---|
| =MROUND(10,3) | Rounds 10 to the nearest multiple of 3. Source: https://support.microsoft.com/en-us/office/mround-function-c299c3b0-15a5-426d-aa4b-d2d5b3baf427 (worked example) | 9 | 9 | Matched |
| =MROUND(-10,-3) | Both arguments negative (same sign, as required) -> rounds to nearest multiple, sign preserved. Source: Microsoft MROUND docs worked example. | -9 | -9 | Matched |
| =MROUND(1.3,0.2) | Rounds 1.3 to the nearest multiple of the fractional value 0.2. Source: Microsoft MROUND docs worked example. | 1.4 | 1.4000000000000001ProvenanceMicrosoft's documented example rounds this to 1.4; true IEEE-754 double nearest value is 1.4000000000000001 (0.2*7), same well-known binary-float representation issue as ROUND(1.005,2) elsewhere in this corpus. |
Matched |
| =MROUND(5,-2) | Number and multiple must have the same sign, per Microsoft docs: 'The Number and Multiple arguments must have the same sign. If not, a #NUM error is returned.' | #NUM! | #NUM! | Matched |
| =MROUND(0,5) | Zero rounds to zero regardless of the multiple. | 0 | 0 | Matched |
LibreOffice Calc 25.8.7.3 (tested 2026-07-29)
| Formula | Description | Result | Expected | Verdict |
|---|---|---|---|---|
| =MROUND(10,3) | Rounds 10 to the nearest multiple of 3. Source: https://support.microsoft.com/en-us/office/mround-function-c299c3b0-15a5-426d-aa4b-d2d5b3baf427 (worked example) | 9 | 9 | Matched |
| =MROUND(-10,-3) | Both arguments negative (same sign, as required) -> rounds to nearest multiple, sign preserved. Source: Microsoft MROUND docs worked example. | -9 | -9 | Matched |
| =MROUND(1.3,0.2) | Rounds 1.3 to the nearest multiple of the fractional value 0.2. Source: Microsoft MROUND docs worked example. | 1.4 | 1.4000000000000001ProvenanceMicrosoft's documented example rounds this to 1.4; true IEEE-754 double nearest value is 1.4000000000000001 (0.2*7), same well-known binary-float representation issue as ROUND(1.005,2) elsewhere in this corpus. |
Matched |
| =MROUND(5,-2) | Number and multiple must have the same sign, per Microsoft docs: 'The Number and Multiple arguments must have the same sign. If not, a #NUM error is returned.' | 6 | #NUM! | Mismatch |
| =MROUND(0,5) | Zero rounds to zero regardless of the multiple. | 0 | 0 | Matched |
Docs & syntax
- Excel (desktop): official documentation
- Google Sheets: official documentation
- LibreOffice Calc: official documentation
Related how-to recipes
- How to round time to the nearest 15 minutes
- How to round a number to the nearest multiple (5, 10, 0.25...)
Where MROUND behaves differently
- CEILING, FLOOR & MROUND: Excel vs LibreOffice rounding
Rounding to a multiple with negative numbers: what the legacy CEILING/FLOOR Mode argument does, why the documented default divergence did not reproduce in four LibreOffice builds, and the #NUM! vs #VALUE! split. - FVSCHEDULE: LibreOffice drops text in the rate schedule
Microsoft documents any non-numeric value in FVSCHEDULE's schedule as #VALUE!. Executed, LibreOffice 25.8.7.3 returns 1.09 for =FVSCHEDULE(1,A1:A2) with A2 = "x" - a compounding period silently dropped - while Google Sheets returns #VALUE! as documented. - MROUND(5,-2): Excel #NUM! vs LibreOffice 6
Excel documents MROUND(5,-2) as #NUM! and executed Google Sheets returns #NUM! too; LibreOffice silently returns 6 instead. Why a silent wrong number is worse than an error.