Making millions of coins every day is a complex process. People and machines have to work together smoothly. A tour through the United States Mint at Philadelphia or Denver to witness this process is well worth the visit. But if you can't make the trip, here are some online alternatives.

• Manufacturing:  Read and watch this six-step animated overview.

How Many? How Big?

Look up any current coin on the tables of Production and Sales Figures.

Get specs like size and weight for each circulating coin on the Coin Specifications page.