=PRODUCT(value;value;...)

KDE’s English stable-KF6 function handbook shows both a range, e.g. PRODUCT(A1:B5), and an argument list, e.g. PRODUCT(12;5;12.5). PRODUCT(3;5;7) → 105 and PRODUCT(12.5;2) → 25 are published numeric examples. It says 0 is returned if no numeric values are found, which differs from the related KPRODUCT documented to return 1 in that case. The 26.08.2 source registry independently lists PRODUCT in the math module. PRODUCT reference · KPRODUCT reference · pinned registry.

Defaults and limits: The handbook does not document a default factor or upper argument limit. Although it specifies the no-numeric case, this guide does not extrapolate undocumented treatment of every text, blank, or error input. The formula notation uses a semicolon between separate arguments in English KDE examples; a single range uses a colon (B2:B4). Check numeric decimal and separator settings using the installed function picker. KDE Simple Sums.

Create a table with Item in A1, Quantity in B1, Unit price in C1 and Line total in D1. Enter the numeric inputs below:

Step 1: Enter B2:C4 as actual numeric values and the headings above.

Step 2: Type =PRODUCT(B2;C2) in D2. Expected D2: 15, since 3 × 5 = 15.

Step 3: Fill or adapt the formula through D4. The independently calculated expected line totals are 24 (4 × 6) and 20 (2 × 10).

Step 4: To total these line subtotals, enter =SUM(D2:D4) in an unused cell. Expected 59. SUM adds three line totals; replacing it with PRODUCT(D2:D4) would multiply them, which is a different task. KDE’s SUM function reference documents range summation. The totals above were calculated independently, not read from a Calligra session.

In a separate empty region of a worksheet, enter three growth/movement factors in B2 = 1.05, B3 = 0.98, and B4 = 1.10. In B5 enter 1.00 (an unchanged period). In A2 enter 1000 as the original amount; A2 is outside the factor range.

=PRODUCT(B2:B5)

Expected factor: 1.1319. The independent multiplication is 1.05 × 0.98 × 1.10 × 1.00 = 1.1319. To apply those adjustments to the opening 1000, enter:

=A2*PRODUCT(B2:B5)

Expected final amount: 1131.9. This is a reproducible demonstration of multiplicative factors, not a forecast, financial advice, or a claim about real-world fees or compounding conventions. If your input cell stores 5% as an actual numeric 0.05, using it directly as a factor would give 0.05 rather than the desired 1.05; express growth as 1+rate first.

A deliberately special case

The official handbook says PRODUCT returns 0 when no numeric values are found. Do not confuse that with KDE’s separate KPRODUCT, which documents 1 under the same condition. If testing this distinction, use a small blank-only range and check the installed version; the expected outcomes here follow the documentation, not a native run.

• Addition vs multiplication: PRODUCT(3;5;7) gives 105, while SUM(3;5;7) gives 15. Confirm the business question before choosing a function.
• A zero factor: Any ordinary numeric product containing a real zero factor is mathematically zero; if a report unexpectedly becomes 0, inspect the factors for zero and verify that you did not select an empty/incorrect range.
• Missing numeric values: KDE specifically documents 0 if PRODUCT finds no numeric values. This is not the same as a data-quality guarantee; verify imported numbers really are numeric.
• Text and blanks: The documentation does not enumerate every coercion or error propagation rule for mixed-type ranges. Never promise that all imported text is silently ignored or returns a particular error code without a native test.
• Percent-factor mix-up: To apply a 5% increase, use a factor of 1.05. Multiplying by the numeric rate 0.05 is a different calculation.
• Range includes result cell: Do not place the product formula inside the same factor range (for example inside B2:B5 while multiplying B2:B5), which risks a circular reference.
• Locale formatting: KDE English syntax separates multiple factors with semicolons; decimal commas used in other locales can affect pasted constants. Try the documented control =PRODUCT(3;5;7) to isolate separator issues.

Check sequence: Verify the formula begins with =, factor cells and range endpoints are correct, values are numeric, no unintended 0 factor appears, and the output display is not rounded or clipped. Try =PRODUCT(3;5;7) and compare against KDE’s 105 control. For unresolved cases check the installed version and documented formula-entry troubleshooting; don’t infer a universal error-code name from this guide.

These spreadsheet programs also have a PRODUCT function for multiplying numeric inputs and ranges. However, English-Excel examples normally separate function arguments with commas while KDE’s English Calligra reference shows semicolons; regional decimal conventions and text coercion can also differ. This guide is anchored in Calligra’s explicit no-numeric-values rule and does not claim identical edge-case results across implementations. No actual cross-software import or native execution was tested.

• SUMIF in Calligra Sheets
• IF in Calligra Sheets — add a conditional warning if a factor is invalid, with explicit data checks.
• KDE PRODUCT definition — exact syntax, argument list/range, examples, no-numeric rule.
• KDE KPRODUCT definition — contrasting no-numeric rule.
• KDE SUM definition — why totals use addition rather than multiplication.
• Pinned Calligra 26.08.2 source — registration of PRODUCT.
• Official Calligra release listing — 26.08.2 released 2026-10-08.

• Calligra Sheets — function documentation
• KPRODUCT reference
• pinned registry
• KDE Simple Sums
• KDE’s SUM function reference

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

• No genuine Calligra Sheets screenshots are included; this guide does not use mock application images.