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Do you mean the Excel/Sheets error "#VALUE!"? If so, it means one or more arguments in a formula are the wrong type (text where a number/date is expected, an invalid string, or an incompatible array), so Excel/Sheets can’t compute the result.
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Common causes and quick fixes - Text in cells that should be numbers - Cause: a number stored as text, or an invisible character (leading apostrophe, non‑breaking space). - Fix: remove apostrophes, use VALUE(cell) or multiply by 1 (cell*1), or use Data → Text to Columns to convert. Use TRIM and SUBSTITUTE(cell, CHAR(160), "") to remove non‑breaking spaces. - Function receiving an invalid string - Example: DATEVALUE("bad date") returns #VALUE!. Fix: supply a valid date string or use DATE(year,month,day). - Trying to perform arithmetic with text - Example: =A1 + A2 where A1 is "apple" → #VALUE!. Fix: correct the input or add error handling (IFERROR/IF/ISNUMBER). - Wrong argument types for functions - Example: some functions expect ranges, arrays, or numbers; giving a single text value can cause #VALUE!. - Fix: check the function’s required argument types in help. - Array/formula mismatch (Excel dynamic array issues) - Cause: spilled ranges or incompatible operations on arrays. - Fix: ensure formulas are entered correctly (Ctrl+Shift+Enter for older array formulas) or adjust references. - External links or add‑in errors - Cause: a referenced workbook is unavailable or returned text. - Fix: restore link or correct reference.
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How to debug step-by-step 1. Use Evaluate Formula (Formulas → Evaluate Formula) to step through the calculation. 2. Isolate parts of the formula in helper cells to see which part returns text or error. 3. Test cell types: =ISNUMBER(A1), =ISTEXT(A1), =ISERROR(A1). 4. Remove non‑printable characters: =TRIM(CLEAN(SUBSTITUTE(A1,CHAR(160),""))). 5. Wrap suspect parts with IFERROR or IF(ISTEXT(...),…) while fixing the root cause: - Example: =IFERROR(VALUE(A1), "bad input") 6. For dates, ensure locale/format is correct and consider using DATE or DATEVALUE appropriately.
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Examples - =A1 + A2 returns #VALUE! because A1 = "123 " (text). Fix: =VALUE(A1)+A2 or =A1*1 + A2. - =DATEVALUE("31/02/2020") returns #VALUE! (invalid date). Fix: correct date or use DATE(2020,2,29) if applicable. - =SUM(A1:A10) will ignore text, but =A1 + A2 will error if either is text.
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If you paste the formula (and a few example cell values) I can point out the exact cause and give the precise fix.
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Here's a couple other options if you’d rather go a different route:
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