MROUND Function in Excel

The number and multiple parameters have different signs (one positive, one negative). MROUND requires both parameters to have the same sign for the calculation to work properly.

1. Check that both number and multiple are positive or both are negative 2. Use ABS() function to convert negative values to positive if needed: =MROUND(ABS(A2), ABS(B2)) 3. Validate input data to ensure sign consistency before calculation 4. Wrap formula in IFERROR for graceful error handling: =IFERROR(MROUND(A2, B2), "Sign mismatch") 5. Add IF statement to check signs: =IF(SIGN(A2)=SIGN(B2), MROUND(A2, B2), "Error")

Add data validation rules to ensure consistent signs, or use conditional logic to handle mixed signs. Document this requirement for users entering data manually.

The multiple parameter is zero or an empty cell. MROUND cannot divide by zero when calculating the nearest multiple. This often occurs when referencing empty cells or when formulas produce zero results.

1. Ensure multiple parameter is non-zero 2. Check for empty cells in your multiple reference 3. Use IF to test for zero before applying MROUND: =IF(B2=0, A2, MROUND(A2, B2)) 4. Set a default multiple value: =MROUND(A2, MAX(B2, 1)) 5. Add data validation to prevent zero entries in the multiple column

Use data validation to prevent zero entries in multiple column: Data > Data Validation > Custom > =B2<>0. Or add IF guard clause in formula.

One or both parameters contain text, logical values (TRUE/FALSE), or non-numeric data types that cannot be processed mathematically. This includes cells formatted as text with numbers, or cells with hidden characters.

1. Verify both parameters are numeric values 2. Check for hidden characters or formatting issues using CLEAN() and TRIM() 3. Use VALUE() to convert text numbers to numeric: =MROUND(VALUE(A2), VALUE(B2)) 4. Apply proper number formatting to cells 5. Use ISNUMBER() to validate before processing: =IF(AND(ISNUMBER(A2), ISNUMBER(B2)), MROUND(A2, B2), "Invalid")

Apply proper number formatting to cells and use data validation to restrict input to numbers only. Use Data > Data Validation > Decimal or Whole Number.

Floating-point precision issues with Excel's 15-digit limit, or misunderstanding of rounding behavior at midpoints. MROUND rounds away from zero when exactly halfway between two multiples.

1. Understand midpoint behavior: values exactly halfway round away from zero 2. For very large numbers, consider scaling before rounding 3. Use ROUND for decimal precision instead of MROUND for multiples 4. Verify your multiple is correct (0.01 for pennies, not 0.1) 5. Test with simple values first to confirm expected behavior

Document the rounding behavior in your spreadsheet, especially the midpoint rule. Test edge cases during development. Consider using CEILING or FLOOR if you need consistent up/down rounding instead of nearest.