Method 1 – Predicting Exponential Growth Using Excel GROWTH Formula:
Description:
 The GROWTH function in Excel predicts future exponential growth based on existing data.
 Given a set of x and y values, it calculates the relationship between them and uses it to predict y values for new x values.
 The formula for GROWTH is:
$y=bâ‹…m_{x}$
 Here, $y$ is the intercept from the yaxis, and $m$ is the slope of the curve.
Syntax:
=GROWTH(known_ys, [known_xs],[new_xs],const )
Here:
known_ys – A set of known y values that is a required argument.
known_xs– A set of known x values of the same dimension as of the set of y values and it is an optional argument.
new_xs A set of new x values for which the function should calculate the predicted y values. It is also optional. If not given the function assumes it as the same length as the set of known x values.
const– If TRUE or omitted, b is calculated normally.
If FALSE, b is set to 1 and the equation is adjusted to y= m^{x}
Example 1: Inputonly known_ys
Steps:
 Suppose we have y values in cells B3:B8.
 In cell D3, enter =GROWTH( and select cells B3:B8 as known_ys argument.
 Press Enter.
We have the growth in cells D3:D8.
Notes:
You can round these values using the following formula in cell D3:
=ROUND(GROWTH(C3:C8),0)
Example 2: Input known_ys and known_xs
 Use both known_ys and known_xs arguments in the GROWTH function.
 The growth will be the same as in Example 1.
Example 3: Input known_ys, known_xs, and new_xs
 Add a new_xs column for prediction.
 In cell E3, use the formula:
=GROWTH(C3:C8,B3:B8,D3:D8)
where D3:D8 represents new_xs values.
As we described earlier, the GROWTH function predicts values based on the relationship (equation) is found from the existing data, which is illustrated in the following screenshot.
Example 4: Input known_ys, known_xs, new_xs, and const
 Omitting the const argument defaults to TRUE.
 The following screenshot shows growth values for different const arguments.
Read More: How to Calculate Monthly Growth Rate in Excel
Method 2 – Estimating Future Value Using Exponential Growth Formula in Excel:
Description:
 If we have a quantity (such as population, profit, or investment) that grows at a constant rate over time intervals, we can use the exponential growth formula to predict future values.
 The formula for exponential growth is:
(y) = a*(1+r)^x
 Here:
 $a$ represents the initial value of the quantity (e.g., initial investment).
 $r$ is the constant annual growth rate.
 $x$ denotes the number of time intervals.
 Here:
Example:

 Suppose we have an initial investment of $10,000.
 We want to find the value after 4 years at a constant growth rate of 6%.
 Applying the formula:
$y=10,000*(1+0.06_{4}$
 The outcome will give us the predicted value.
Notes
Different types of Errors in the GROWTH function:
 #NUM!: Occurs when any known_ys value is zero or less than zero.
 #VALUE!: Appears if the known_ys values or known_xs or new_xs contain nonnumeric values.
 #REF!: Is another error that can occur while using the GROWTH function.
This error occurs when the lengths (dimensions) of known_ys and known_xs values are not equal.
Using the GROWTH Function as an Array:
 To calculate multiple y values, use the GROWTH function as an array:
 Enter the formula in a cell and press Ctrl + Shift + Enter.
Read More: How to Calculate Revenue Growth Rate in Excel
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