What is the Roma Pass? Is it worth getting one?

A typical visit to Rome is about 3 days. In this time, you can see the major plazas and fountains of Rome, Vatican/Vatican Museums, Ancient Rome (Coliseum and Roman Forum) and maybe the Galleria Borghesemuseum. Since visiting the Vatican and Vatican museums will take up one day of major sight-seeing, that leaves two days to use the pass for other sites in Rome.

Most people use the pass to get into the Coliseum and the Galleria Borghese. If you pay for them separately, entry to the Coliseum is 12 Euros and entry to the Borghese museum is 9 Euros (although at times, the Borghese museum entrance fee may be higher if there is a special exhibit.) This comes to just over 20 Euros. 

Will you visit at least one other museum or monument in Rome on this list, in the 3 days? They are all discounted with the Roma Pass, so if you have a very intense schedule of museum/monument visiting, then you might get more than your money's worth out of the Roma Pass.

Using the Roma Pass to get around Rome

The pass costs 36 Euros. Remember, you also get, included in the pass, unlimited Metro/bus use.

So, will you use nearly 14 Euros of bus/metro rides? A one-way bus/metro ticket costs 1.50€, so you'd need to take at least 7 rides in 3 days for it to be worthwhile for that purpose. 

If you are staying near Termini station or in Trastevere, or near the Vatican, and need to take the metro to get into the center, or, if you have any walking issues and plan to use public transportation a lot, then maybe you will get this use out of it.

If you do not want to purchase the Rome Pass, but do want to use the Rome city bus and metro system extensively, consider purchasing a day pass for 7€, a 2-day pass for 12.50€, a 3-day pass for 18€ or a week-long pass for 24€.

You may purchase these at almost any tobacco shop or news stand.
http://www.romewise.com/roma-pass.html