I was just poking around in the metronome that comes in the latest 10-pak. You guys probably know about it. It's got various gizmos. Here's the Help section on the "Tempo Calculator."

"Tempo Calculator

This opens the Tempo Calculator dialog, which will automatically calculate the tempo needed to play a given number of bars in a certain length of time. If the Tempo Calculator is enabled, the metronome will always use this calculated tempo. The calculator will also tell you the number of bars played for a given tempo and duration, and how long it will take to play a given number of bars at a given tempo."

It's got several pre-loaded time signatures, and you can define your own, in 16th, 8th, 4tr, or half notes. The calculator honors any time signature you set.

FWIW. -Ron