Formula Errors

How to Fix Excel IF Formula Returning FALSE for Equal Negative Numbers

WPS Editor Oct 10, 2026 869 views

Question details

The user is trying to use an IF formula to compare two identical negative numbers, but the formula evaluates the condition as FALSE.

How to Fix Excel IF Formula Returning FALSE for Equal Negative Numbers

Product: Excel
Device & OS: not provided
Scenario: Comparing two calculated negative numerical values using an IF function to return a specific result if they match perfectly.
Observed behavior: The IF function returns FALSE even though both negative numbers appear identical on the spreadsheet screen.

Before you start

Before proceeding, check if the cells you are comparing are populated by other formulas rather than being manually typed, as formula calculations often introduce microscopic precision differences.

Solution 1Recommended

Use the ROUND Function in Your Comparison

Wrapping the cell references inside the IF formula with the ROUND function ensures that Excel compares the exact visible numbers, eliminating any hidden decimal discrepancies.

In spreadsheet software, numbers are stored with up to 15 digits of precision. Even if a cell is formatted to display only two decimal places (e.g., -2.50), the underlying calculated value might be -2.500000000001. Using the ROUND function forces Excel to evaluate the exact rounded value.

Select the formula cell

Click on the cell that contains your IF formula.

Edit the comparison logic

Modify your formula in the formula bar to round both cell references. For example, change =IF(Q51=Q35, "Rock on!", "") to =IF(ROUND(Q51,2)=ROUND(Q35,2), "Rock on!", "").

Apply the changes

Press Enter on your keyboard to apply the updated formula and check if it now evaluates to TRUE.

Use the ROUND Function in Your Comparison

Best Practice: Alternatively, you can apply the ROUND function directly to the source formulas generating the negative numbers to permanently resolve the precision issue across the entire workbook.

Solution 2

Verify Cell Data Types Using ISNUMBER

Check if one of the negative numbers is accidentally stored as text, which would cause an equality comparison with a real number to fail.

Solution 3

Increase Decimal Places to Reveal Hidden Differences

Visually inspect the exact underlying values of both cells by increasing the visible decimal precision.

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WPS Spreadsheet provides robust formula handling, intuitive error checking, and exact Microsoft Excel compatibility, making it easy to troubleshoot logical functions like IF and ROUND.

1. Open your file in WPS Spreadsheet: Launch WPS Office and open your existing .xlsx file containing the troublesome IF formula.
2. Access the formula bar: Select the target cell and click into the formula bar at the top of the workspace.
3. Apply logical fixes: Easily wrap your cell references in the ROUND function or use built-in error checking to instantly convert text to numbers.

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Frequently Asked Questions

Why does Excel show two identical numbers as different?

Spreadsheets use floating-point arithmetic and store numbers with up to 15 digits of precision. Even if a cell is formatted to show only two decimal places, the underlying calculation might possess microscopic differences (e.g., -5.000000000001 vs -5.00). An exact match comparison evaluates the underlying value, causing the IF formula to return FALSE.

Do negative numbers affect IF statements differently than positive ones?

No, negative numbers follow the exact same logical comparison rules as positive numbers. The issue almost always stems from hidden decimals, formatting, or data types (text vs. number) rather than the presence of a minus sign.

How do I permanently fix rounding errors in my spreadsheet source formulas?

Instead of rounding inside every IF statement, you can wrap the original calculation formulas in the ROUND function (for example, =ROUND(A1/B1, 2)). This ensures that the cell inherently generates and stores the cleanly rounded value.

Excel & Data Problems