If you've worked the counter long enough, you've had the same conversation a hundred times. Someone walks in with a rebuildable tank, holds up a spool of wire, and asks, "How many wraps should I do?" The honest answer is: it depends on what ohms you're chasing, and that depends on your device's power range.

For e-commerce operators, the stakes are a bit different. You're not just helping one customer; you're writing product listings, answering support tickets, and maybe even building sample coils for photos. If you can explain wraps in plain terms, you'll save yourself a lot of back-and-forth.

Let's break down the myths first, then I'll point you to a tool that does the heavy lifting.