# Excel BETAINV Function

This post will guide you how to use the BETAINV function with syntax and examples in Microsoft excel.

### Description

The Excel BETAINV function returns the inverse of the beta cumulative probability density function. So if the probability is equal to BETADIST(x,…), then the BETAINV(probability,…) will return x. and this function has been replaced by the new function BETA.INV function.

The BETAINV function is a build-in function in Microsoft Excel and it is categorized as a Statistical Function.

The BETAINV function is available in Excel 2016, Excel 2013, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000, Excel 2011 for Mac.

### Syntax

The syntax of the BETAINV function is as below:

`= BETAINV(probability, alpha, beta, [A], [B])`

Where the BETAINV function arguments are:

• Probability -This is a required argument.  A probability associated with the beta distribution, for which you wish to find the value of x.
• Alpha – This is a required argument.  It is a parameter of the distribution.
• Beta – This is a required argument.  It is a parameter of the distribution.
• A – This is an optional argument. A lower bound to the interval of x. If it is omitted, it will be set the default value 0.
• B – This is an optional argument. A upper bound to the interval of x. If it is omitted, it will be set the default value 1.

Note:

• If any argument is non-numeric, the BETAINV function will return the #VALUE! Error.
• If the Alpha or Beta argument is smaller than or equal to 0, then the BETAINV function will return #NUM! Error.
• If the argument probability is small than or equal to 0 or greater than 1, the BETAINV function will Return #NUM! Error.

### Excel BETAINV Function Examples

The below examples will show you how to use Excel BETAINV Function to calculate the cumulative beta distribution or beta probability density function.

1# to calculate the inverse of the cumulative beta probability density function for a supplied set of parameters, using the following formula:

`=BETAINV(0.52,3,4,1,3)` ### Related Functions

• Excel BETA.DIST function
The Excel BETA.DIST function can be used to calculate the cumulative beta distribution or beta probability density function.The syntax of the BETA.DIST function is as below:= BETA.DIST(x, alpha, beta, cumulative, [A], [B]).… 