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Excel NOMINAL function

The NOMINAL function is the inverse calculation of the EFFECT function.
It calculates the nominal annual interest rate for a given effective interest rate and the number of compounding periods per year.


NOMINAL(effect_rate, npery)


Effect_rate (Required): The effective interest rate (A percentage or a numeric value between 0 and 1);
Npery (Required): The number of compounding periods per year.


1. If the “npery” is a decimal, it will be truncated to an integer;
2. The #NUM! error occurs when one of the following condition is met:
-- The “effect_rate” is less than or equal to 0;
-- The “npery” is less than 1.
3. The #VALUE! error occurs if one or both of the arguments are non-numeric;
4. The relationship between NOMINAL and EFFECT is shown below:

Return Value

It returns a decimal value.


As shown in the screenshot below, there are two columns separately containing the effective interest rates and the number of compounding periods per year. To calculate the corresponding nominal interest rates, you need to do as follows.

1. Select a blank cell (here I select cell D6), copy or enter the formula below and press the Enter key to get the result. Select this result cell and then drag its AutoFill Handle down to get other results.


2. Then you need to change the cell format to percentage.

2.1 Select all result cells, right click and select Format Cells from the context menu;
2.2 In the Format Cells dialog box, under the Number tab, select Percentage in the Category list box, specify the Decimal places and finally click the OK button to save the changes.

Then you can see the effective interest rates are displayed as follows.

Related Functions

Excel EFFECT function
The EFFECT function calculates the effective annual interest rate for a given nominal annual interest rate and number of compounding periods per year.

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