# How to get Average annual growth rate formula in Excel In this article, we will learn How to get the Average annual growth rate formula in Excel.

What is Average Annual growth rate (AAGR)?

Average of the annual growth is a business investment term. It is used to understand a company's financial portfolio. For example if a stock portfolio has grown with an AAGR of 20% in the last 5 years, it means that you have added 20% of the value every year (at the end of the year as compared with the beginning of the year). Let's understand how excel helps in calculating the Average Annual growth rate value here.

AAGR formula in Excel

Like the Compound annual growth rate, AAGR is also a two step formula.

First each year growth rate is calculated. To find each year % growth rate use the below formula.

% growth rate each year formula

 =(cur_amount/ prev_amount) - 1

Cur_amount : current year amount value

Prev_amount : previous year amount value

Secondly now you have the list of % growth rate of each year. To get the average annual growth rate just take the average of the values in the list.

AAGR formula

 =AVERAGE(list of each year growth rate)

Example :

All of these might be confusing to understand. Let's understand how to use the function using an example. Here we list stock value over the past 5 years. It's sales will boost if it would have the average annual growth rate of the stock above 18%.

So to calculate first we calculate the growth rate of stock each year. Starting from the first year value.

Use the formula:

 =B3/B2 -1 As you can see each year the growth rate has fluctuated and can get more results out of it until we get the average of the values. These values may appear in decimal, change the cell format from general to percentage.

This is the second step of the process. To get the average of the given values, use the below mentioned formula.

Use the formula:

 =AVERAGE(C3:C7) The equivalent compound annual growth rate comes out to be 19%. It's clearly above 18% we wished.

The formula might not return the value in percentage, it might be showing 0.19.. (in decimals). Change the format of the cell from Number to Percentage.

What is the compound annual growth rate and how is it calculated?

Compound annual growth rate (CAGR) is the business and investment term that provides the constant rate of return over some years. It can be thought of as the growth rate that gets you from the initial investment value to the ending investment value if you assume that the investment has been compounding over the time.

Use RRI to calculate the CAGR :

RRI is the equivalent interest rate for growth of an investment. Generally it is used to calculate the Compound Annual Growth Rate (CAGR). It returns the interest rate for the given period of time having future and present value of investment. The mathematical formula to calculate CAGR or RRI value is shown below.

RRI or CAGR Formula in Excel:

 = [(FV/PV) ^ (1/nper)] - 1

FV : future value

PV : present value

nper is the time period over which the rri value is calculated. Let's understand how to calculate CAGR in excel.

RRI function in Excel

RRI function in excel returns the equivalent interest rate over a given period of time. This interest rate is calculated for the difference between present value and future value of investment. Let's see the below function syntax to understand.

RRI Function syntax:

 =RRI (nper, pv, fv)

nper : period of time in years

pv : present value of investment

fv : future value of investment

Example :

All of these might be confusing to understand. Let's understand how to use the function using an example. Here we are given a list of amounts over a period of 9 years. We need to calculate the Annual Growth Rate for the following data. First we will calculate the annual growth percentage for the first year.

Use the formula:

 =RRI (1, C4, C5) As you can see there is 4 percent growth in Sales for the first year. Now extend this formula to the remaining cells using the Ctrl + D or dragging down from the right bottom of the formula acquired cell. This array indicates the annual growth in each year comparing value in the start of period (pv) with the value at the end of period (fv). This function allows you to choose the time interval between two values. Now we will calculate the equivalent interest for the whole 9 years.

Use the formula:

 =RRI (9, C4, C13) The equivalent compound annual growth rate comes out to be 14%. The formula might not return the value in percentage, it might be showing 0.141 (in decimals). Change the format of the cell from Number to Percentage.

Calculate CAGR using simple formula in excel

Calculate the same result using the mathematical formula stated formula. CAGR = [(FV/PV) ^ (1/nper)] - 1. This ^ character indicates the power of the base value.

Use the formula:

 =(C13/C4)^(1/9)-1

C13 : future value

C4 : present value

9 : period of investment The formula returns 14%, the same value returned by the RRI function. Functions are easy to use and there are less chances of error, than using the mathematical formula.

Here are some observational notes using the RRI function shown below.
Notes :

1. The function returns the equivalent interest rate in decimal (0.12) or percent (12%) value. The both are considered same in Excel
2. If any argument of the function has negative value, the function returns #NUM! Error.
3. If any argument of the function has non numeric value, the function returns #VALUE! error.

Here are all the observational notes using the formula in Excel
Notes :

Hope this article about How to use the ... function in Excel is explanatory. Find more articles on calculating values and related Excel formulas here. If you liked our blogs, share it with your friends on Facebook. And also you can follow us on Twitter and Facebook. We would love to hear from you, do let us know how we can improve, complement or innovate our work and make it better for you. Write to us at info@exceltip.com.

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