LOG10 Function in Excel

The number argument is zero or negative (logarithms are undefined for non-positive real numbers)

1. Verify the input number is positive (>0) 2. Check for zero values in your data range 3. Use ABS() to convert negative values to positive if appropriate 4. Add data validation to prevent invalid inputs 5. Use IF to handle edge cases before calculation

Always validate that input values are positive before using LOG10. Consider using conditional formatting to highlight invalid data.

The argument contains text, logical values, or other non-numeric data types

1. Check for hidden spaces or text characters in cells 2. Use VALUE() function to convert text numbers to numeric 3. Verify cell references point to numeric data 4. Remove any formatting characters (currency symbols, percentages) 5. Use ISNUMBER() to test data type before processing

Use ISNUMBER() validation checks before processing data. Apply number formatting to ensure cells contain numeric values.

Typo in function name or using in older Excel versions (pre-Excel 97)

1. Check spelling: must be LOG10, not Log10 or log10 2. Verify Excel version supports LOG10 (97 or later) 3. Use alternative: =LOG(A2, 10) for same result 4. Update Excel if using very old version

Use Excel's formula autocomplete feature to avoid typos. For maximum compatibility, consider using LOG(number, 10) instead.