This is a great utility for DVD creation. Is there an equivalent for Blu-Ray?
There are a few ways to calculate the bitrate for a Blu-ray. You can either do it with online scripts hosted on various websites, or simply use an application from the database of Software Informer. To access the results list, access the link below. If you don't want to install an application, then use the online script.
Database with applications: http://software.informer.com/search/bitrate+calculator
Online script: http://dvd-hq.info/bitrate_calculator.php