If you're getting into coil building, Kanthal A-1 is the wire you want to start with, and 24 or 26 gauge is the place to begin. It's forgiving, easy to work with, stable at vaping temperatures, and compatible with virtually every rebuildable atomizer on the market. It's the industry standard for a reason. Here's how to choose a gauge, how it compares with the alternatives, and what else you need on the bench.
Why Kanthal A-1 is the standard
Kanthal A-1 is an iron-chromium-aluminium alloy rated for continuous use up to 2550°F, far beyond anything a coil sees. It holds its shape once wrapped, doesn't spring back much, and its resistance barely moves as it heats. That stability is why it's so predictable in wattage mode, and also why it can't be used for temperature control, which depends on resistance changing with heat. If you run a variable wattage mod, Kanthal is the easy choice; our beginner's guide to VV and VW mods covers the settings side.
Understanding Kanthal wire gauge
Kanthal wire is measured in AWG (American Wire Gauge): the higher the number, the thinner the wire, and the more resistance you get per foot. These are the gauges we stock, with the figures from the spool:
| Gauge | Diameter | Resistance | Typical use |
|---|---|---|---|
| 24 AWG | 0.50 mm | 2.07 Ω/ft | Versatile middle ground, good resistance range, easy to work with |
| 26 AWG | 0.40 mm | 3.31 Ω/ft | Thinner, higher resistance per wrap, popular for MTL builds |
| 28 AWG | 0.32 mm | 5.60 Ω/ft | Higher-resistance builds or tight spaces |
| 30 AWG | 0.26 mm | 8.30 Ω/ft | Very fine; twisted or parallel builds, or high-resistance single coils |
| 32 AWG | 0.20 mm | 14.53 Ω/ft | Small MTL coils and as the wrap wire in clapton-style builds |
| 34 AWG | 0.16 mm | 26.7 Ω/ft | Finest we carry; specialty wraps only |
Thicker wire (lower AWG) needs more wraps to reach a given resistance and takes a moment longer to heat; thinner wire reaches the same resistance in fewer wraps and ramps faster but is more delicate. For a first build, 24 AWG on a 2.5–3 mm jig is hard to get wrong.
Kanthal vs nichrome vs stainless steel
| Wire | Resistance per foot | Ramp-up | Modes | Notes |
|---|---|---|---|---|
| Kanthal A-1 | Highest of the three | Slowest | Wattage / voltage | Forgiving, holds shape, the beginner standard. What we stock. |
| Nichrome 80 | Lower | Fast | Wattage / voltage | Fewer wraps for the same ohms; less tolerant of dry firing |
| Stainless 316L | Lowest | Fast | Wattage and temperature control | The only one of the three that works in TC mode |
We currently stock Kanthal only, in round and ribbon form. If you're building for a wattage mod, that's all you need.
Calculating resistance
Your final coil resistance depends on three things: wire gauge, coil diameter (from your jig), and number of wraps. There are free online coil calculators that take the guesswork out of this: plug in your wire gauge, inner diameter and target resistance, and it tells you how many wraps to make.
A rough example from the spool figures above: 26 AWG at 3.31 Ω/ft, six wraps on a 2.5 mm jig plus the two legs, uses a little under three inches of wire and lands somewhere around 0.7–0.8 Ω. Treat that as a starting point, not a promise. Always confirm the real number with an ohm reader before the coil goes anywhere near a battery.
Ribbon wire
We also carry Kanthal A-1 flat ribbon wire (0.5 mm wide by 0.1 mm thick, 9.2 Ω/ft). Its larger surface area produces more vapor for a given resistance, and the flat profile makes it easy to wrap tidily. It's a clearance item, so it's available while stock lasts.
What you'll need alongside the wire
| Item | Why |
|---|---|
| Tobeco Coil Jig V2 | Wraps consistent coils at a set diameter. See our write-up. |
| Ceramic-tip tweezers | Compress the coil and pinch out hot spots while it's glowing without shorting it |
| Japanese organic cotton | Clean-tasting wick that saturates evenly |
| An ohm reader | Verify resistance before use. We stock the DT830D multimeter for the job. |
| A deck to build on | APO, Zenith V2 or IGO-W6 RDAs are user-friendly starting points |
For the full bench list, read coil building tools: what you actually need to get started. And if you decide building isn't for you, pre-made heads in our replacement coils collection drop straight into any tank in advanced mods and tank kits.
Frequently asked questions
What gauge Kanthal should a beginner use?
24 or 26 AWG. 24 is the versatile middle ground and the easiest to wrap; 26 gives more resistance per wrap, which suits mouth-to-lung builds. Go thinner only when you have a reason to.
Can I use Kanthal in temperature control mode?
No. Kanthal A-1's resistance barely changes with heat, which is exactly what temperature control relies on. Run Kanthal in wattage or voltage mode only.
Kanthal vs nichrome: which is better?
Neither is better, they're different. Kanthal has more resistance per foot and ramps up more slowly, so it's forgiving and predictable. Nichrome 80 ramps faster and needs fewer wraps for the same resistance, but is less tolerant of dry firing. Beginners are better served by Kanthal.
How long does a 32ft spool last?
A long time. A typical single coil uses well under a foot of wire, so even a builder rewrapping every week gets months from one spool.
Shop Kanthal A-1 resistance wire at SmokTek → 32ft spools, six gauges, same or next business day shipping. Family-run since 2011.
SmokTek products are for adults 21 and over. WARNING: These products contain nicotine. Nicotine is an addictive chemical. Vaping is intended as a better smoking alternative for adult smokers. It is not a safe product, and nothing in this article is a health or cessation claim. Rebuildable atomizers and resistance wire are for experienced users; learn about rebuilding before you attempt it. In line with the PACT Act, all shipments require an adult signature on delivery.