# Error tolerance in coil design (number of turns)

## Main Question or Discussion Point

I am designing a coil which will have 2100 turns of 30AWG wire.
The bobbin diameter is 1.045" and the length is 1.28"

From my calculations I will use about 8,420 inches of wire.
I tried an online calc but they did not take into account that the wire I am using has a heavy insulation so it's diamter is about .0115".

As we know things is the real world are usually somewhat different.

My question is how much of an error tolerance I should expect in terms of wire length for the 2100 turns? And should I expect to use more or less wire than calculated?

Any help/suggestions would be greatly appreciated.

Related Electrical Engineering News on Phys.org
Layer wound or random wound?
If layer what is layer insulation?
If random wound, depends on winder. Assume maybe 60% fill?

Is this a math exercise? Like how many balls can you fit in a can?!!!

Just get extra wire and wind it, point is you want to have extra to make sure you have enough!!!

vk6kro