=SUM(number1, [number2], ...)

Square brackets are documentation markers for optional parameters, not characters to type in a formula. Formula names and comma-separated arguments here follow ONLYOFFICE’s official function-entry guide. Locale settings can affect punctuation and displayed formats.

Create a new sheet with these small source records:

If a cell is marked leave empty, leave it truly empty rather than entering the words in the table. Put the formula in a free cell away from the source data.

=SUM(B2:B6)

Expected result: 70. 12 + 15 + 30 + 8 + 5 = 70. This is an arithmetic/logical prediction on the supplied sample, not a claim of native ONLYOFFICE testing.

=SUM(B2:B4)

Expected result: 57. Only the first three numbers are included: 12 + 15 + 30 = 57. Comparing these two results helps identify incorrect ranges and mismatched conditions.

Add the first three records and the final record, leaving the fourth order out.

=SUM(B2:B4,B6)

Expected result: 62. 12 + 15 + 30 + 5 = 62. Change just the source value described above to reproduce the variation.

SUM expects numerical inputs. Text imported from a currency-formatted CSV may not be treated as a number; overlapping ranges also cause unintended double-counting.

Unrecognized formula names, missing arguments, incorrect parentheses and incompatible separators may cause an error. When an output is surprising, test the small example first, check whether input values are genuine numbers, then inspect the formula’s range endpoints. Do not guess a specific error label when it has not been produced by a native test.

If the result differs from 70, inspect B2:B6 for skipped rows and numeric-looking text. Check range boundaries before substituting a production dataset. If formulas are displayed as text, ensure the destination cell is treated as a formula and starts with an equals sign. If copying a formula, decide which references should remain fixed and apply $ anchors as needed.

The current official function inventory lists this function. The checked changelog does not give its first supported build. Verify the installed edition rather than implying unsupported old builds work.

The official changelog was reviewed on 2026-10-11 UTC. No unsupported introduction date or minimum edition is invented.

Excel, LibreOffice Calc and Google Sheets have SUM, but formulas with multiple inputs may require locale-specific separators. Microsoft also provides a version-aware function catalogue. Consult the eight-software comparison for navigation, but verify formula semantics in each destination app before copying a workbook.

• SUMIF guide
• SUMIFS guide

• ONLYOFFICE Spreadsheet Editor — function documentation
• ONLYOFFICE’s official function-entry guide
• official changelog

Verification status: Official documentation checked; example outcomes were independently reasoned or arithmetically checked where applicable. Not executed in ONLYOFFICE Spreadsheet Editor.

• No genuine ONLYOFFICE Spreadsheet Editor screenshots are included; this guide does not use mock application images.