# The Excel function: GAMMAINV

## Syntax

GAMMAINV(probability,alpha,beta)

The GAMMAINV function syntax has the following arguments (argument: A value that provides information to an action, an event, a method, a property, a function, or a procedure.):

**Probability**Required. The probability associated with the gamma distribution.**Alpha**Required. A parameter to the distribution.**Beta**Required. A parameter to the distribution. If beta = 1, GAMMAINV returns the standard gamma distribution.