Coil Wrapping Calculator

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Custom materials
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mmin
The distance between each "ridge" on the twisted wire. Use 0 for non-twisted wire (parallel strands). For improved accuracy: Count 10 ridges, measure their total width, and divide by 10.
Max 4 for twisted wire.
AWG Ør mmin
mmin × mmin
The width should normally be larger than thickness. Swap them
In a multi coil setup, all coils must be identical. Two coils in parallel. Total resistance is halved. (12 R) Two coils in serial. Total resistance is doubled. (2 R) All three coils in parallel. Total resistance is divided by three. (13 R) All three coils in serial. Total resistance is tripled. (3 R) All four coils in parallel. Total resistance is quartered. (14 R) All four coils in serial. Total resistance is quadrupled. (4 R) Two coils in serial, connected in parallel to a second pair of serially connected coils. Or the other way around: Two coils in parallel, connected in serial to a second pair of parallelly connected coils. Total resistance is the same as for a single coil. (1 R)
Ra Ω
Set the desired total coil resistance for your build.
R
l
Ω
mm
Ω
in
Changing material, AWG or wire diameter updates this value.
lr mmin
Changing material, setup, target or wire resistance updates this value.
c mmin
ll mmin
Total length of wires between coil and posts.
mmin
Space between each coil loop.
Always measure your coil before you fire it!

Heat flux

mW/mm²
V
W
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