This App will compute either the number of measures, piece length,
or tempo given the other two. I have found this useful in composing,
for example, if I want to create a piece that will play a certain
amount of time and I need to know about how many measures will
be required.
To use the App, enter the time signature and enter two of measures,
tempo, or time and click the button for the other item. Times
should be entered in seconds or in minutes:seconds. When all three
parameters are entered, you can change any and recompute to see the
effect (e.g. change the tempo and see the effect on time or measures).