How many calories in a slice of unsmoked ham?

It depends on how thin the slice is and the type of ham. A wafer-thin slice of plain deli type ham, for example, can be as little as 10 calories. A slightly thicker slice of a different type of ham can be approximately 45 calories per slice, ounce, or 28g.

To view the examples, see the page link, further down this page, listed under Related Questions.