Coil Wrap Calculator Guide

Coil Wrap Calculator Guide

Richard WinterCoil Building Leave a Comment

Welcome to Vaping Hardware’s Coil Wrap Calculator GUIDE! This is simply a brief explanation of how the calculator works and how to use it properly…

If you want to skip this guide and get started with coil wrapping, feel free to go straight to the Coil Wrap Calculator…

If you have any questions this guide doesn’t answer then feel free to contact us here!

Coil Wrap Calculator

Wire Type

Use this section to select the wire material you plan on using to build your coil. Our calculator allows you to select between Kanthal A1, Nichrome N80, Nickel Ni200, Stainless Steel 316 or Titanium. We also included a handy custom option, essentially allowing you to use any wire type at your disposal (if you select this option, the following AWG section is replaced by a custom field allowing you to input the specific wire diameter and resistance). Each wire type has slightly different properties, therefore it’s important that you select the correct type of wire that you’re using, otherwise the overall resistance or wraps shown in the results section won’t be correct.

Wire Profile

This will enable you to select either a single strand of wire, or up to four strands running parallel/twisted. The most commonly used is a single strand, however, using more than one strand will reduce the overall resistance or increase the surface area of the coil.

Build Deck Configuration

This is basically the number of coils you plan on installing on the build deck you’re using. This can range anywhere from a single coil to dual coils or, if you’re really looking to kick out some clouds; a triple or even quadruple coil setup. Please note, it’s important to remember if you’re installing more than one coil they must be of the same type and resistance. For example, if you’ve built a 1 ohm coil, the second coil must also be 1 ohm. This will then half your overall resistance, giving you a final resistance of 0.5 ohms.

Wire Gauge


This represents the thickness of the wire and is referred to as ‘American Wire Gauge’. You may also see the wire thickness referred to as SWG (Standard Wire Gauge) or in millimetres. The diameter of the wire in millimetres is shown on the right for the corresponding AWG selected.

Inner Coil Diameter

This is essentially the width of the tool or instrument you’re going to wrap your coil around. Some people use a drill bit while others use a purpose made ‘coil jig’ of various sizes. The most common inner coil diameter size is 2.5mm. The diameter of the wire in inches is shown to the side for the corresponding diameter in millimetres selected.

Coil Resistance

Target Resistance

This is the final resistance of your coil(s). The majority of vapers typically build between 1 – 1.5 ohms, however, if you’re interested in sub ohm vaping, you want a target resistance anywhere under 1 ohm.

Tail Lead Length (Total)

This is the length of the lead in/lead out of the coil. This is the straight part of the coil wire that is connected into the post terminals of the build deck. Typical length of each leg would be 2.5mm. When entering your length, please enter the total length of the two legs. If each leg is 2.5mm, then the overall length entered would be 5mm.

Coil Wrap Results

Number of Wraps

This is the exact number of wraps calculated based on the selections made. For information purposes only, this figure will need to be rounded to either a ‘full wrap’ or ‘half wrap’, as provided below.

Rounded to Full Wraps

This is the result of the coil to be built if the legs are pointing in the opposite direction to each other (the figure in brackets is the actual coil resistance with this number of wraps).

Rounded to Half Wraps

This is the result of the coil to be built if the legs are pointing in the same direction (the figure in brackets is the actual coil resistance with this number of wraps).

Overall Length of Wire

This tells you the overall length of wire you’ll need to cut to build the coil you’ve selected.

Resistance of Each Coil

This is the resistance of the coil(s) you’re making. If the Build Deck Configuration is ‘single’, the coil resistance will match the target resistance. If the Build Deck Configuration is ‘dual’, the resistance of each coil will be twice that of the Build Deck Resistance.

Resistance of Build Deck

This is the overall target resistance of the coil setup you’ve selected.

Surface Area of Coil

This is the overall surface area of the coil (not including the lead length) and is measured in mm². The greater the value, the bigger the clouds.

Current Drain from Battery

This tells you the current that’ll be drawn from your battery based on the coil you’re building. Please note, it’s IMPORTANT that this figure NEVER exceeds the available amps of the battery you’re using. If this figure does exceed the available amps, you run the risk of you’re battery overheating and even exploding (bad times!).

Vaping Power at 4.2V

This value indicates the level of power (Watts) you’re coil will vape at with a fully charged battery (only applicable when using a Mechanical Mod).

Happy coil building! If you have any problems we’re here to help! You can find the link for our contact page here.

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