I just made a coil/wick using 32 gauge wire. Wanted to see if I could guestimate and get close to 3.0 ohms. I wrapped 9 wraps around the screwdriver and came out with a 2.7 ohm coil. I'm thinking that each wrap equals around .3 ohms or so. Of course, that's on the screwdriver I use (and I sent you.) Different size screwdrivers would yield a little different results. It's all about the amount of wire you use.