Maybe I'm more mathematical than I thought.

I'm pleating my printed cotton petticoat right now, and it's kind of awesome! I found it a bit difficult to do on the skirt panels for my gown, but with a flat, very straight-forward piece of fabric, it's really rather easy to do.

That may change when I have to do them backwards on the back panel, though!

I had to piece together the petticoat as my fabric was only about 46 inches wide. This makes it more accurate and authentic, as looms back in the 18thc. were much, much smaller then modern ones. 60 inches of fabric may make it really easy, but maybe consider buying smaller pieces of fabric or chopping up the larger fabrics to make it accurate!

The center front box pleat.
I made it about 4 inches.

The seam where I had to
piece together the petticoat.

These are my photographs. Please do not take or use them without permission.