It depends on the width of the nib. A few of my pens have 1.1mm "stub" nibs, and those produce broader strokes on paper. They could certainly be used for calligraphy. This is a quote from Aristotle I wrote out a little while back, as an example with a stub nib:
I'm not really a calligrapher, but I really wanted to revisit and use cursive whenever I write, not just when I'm signing my name on a document. Most of the pens I have are medium or fine nib, which are more suited to everyday writing. The pen pictured above has a fine nib, so the lines will be a bit thinner than they are in the quote here.