No, because it depends on the size of the pearls, smaller pearls have more pearls in a strand than larger pearls have. A 9mm pearl strand of 17 inches can be guessed by doing the math. 9mm times x centimeters of length. I can't remember what 17" is in mm, though. And the pearls are often a tiny bit smaller in the back than the front which complicates things beyond my ability to do math. I think you might need algebra or calculus or something. LOL!
Here's a chart for beads per strand, from Fire Mountain (sorry, I wasn't able to save or copy and paste the chart). It wouldn't account for smaller pearls by the clasps or the clasps themselves, but maybe it would give you a ballpark figure, if that helps: