This article describes the formula syntax and usage of the LOGNORMDIST function in Microsoft Excel. Description Returns the cumulative lognormal distribution of x, where ln(x) is normally distributed with parameters mean and standard_dev. Use this function to analyze data that has been logarithmically transformed. Important: This function has been replaced with one or more new functions that may provide improved accuracy and whose names better reflect their usage. Although this function is still available for backward compatibility, you should consider using the new functions from now on, because this function may not be available in future versions of Excel. For more information about the new function, see LOGNORM.DIST function . Syntax LOGNORMDIST(x,mean,standard_dev) The LOGNORMDIST function syntax has the following arguments: ...