Sqmm to circ mils and reverse,for magnet wire
Sqmm to circ mils and reverse,for magnet wire
(OP)
Can I have assistance in converting square millimeters (sq mm ) to circ mils.
As used to measure cross Sectional Area in magnet winding wire.
Is there a formulae for easy conversion and also in reverse.
As used to measure cross Sectional Area in magnet winding wire.
Is there a formulae for easy conversion and also in reverse.





RE: Sqmm to circ mils and reverse,for magnet wire
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Sqmm to circ mils and reverse,for magnet wire
1 circular mil = area of circle whose dia is 1/1000th of an inch.
1 circ mil is app 5/10000th of a sq mm
* Basically, I would like a full-time job on part-time basis *
RE: Sqmm to circ mils and reverse,for magnet wire
Here's a nice little free software tool that I use:
http://www.pwr-tools.com/
If you click on the menu "math" and then "conversion factors" and then scroll down to "square millimter", you have the conversion you want... Means you can do lots of conversions with ease.
RE: Sqmm to circ mils and reverse,for magnet wire
RE: Sqmm to circ mils and reverse,for magnet wire
The formulae to convert:
CM = 1974.5 * MM2
MM2 = CM / 1974.5
For instance; #1 AWG wire has 83,700 CM or
MM2 = 83700/1974.5 = 42.39
RE: Sqmm to circ mils and reverse,for magnet wire
One square millimeter is equal to 39.37" squared =1549.9969 sq mils
To convert sq mils to circular mils, multiply by 1.2732 which equals 1973.456 c. mils.
So 1 sq mm is equal to 1973.456 circ. mils.
1 circular mil is equal to 0.0005067 mm squared.
RE: Sqmm to circ mils and reverse,for magnet wire
RE: Sqmm to circ mils and reverse,for magnet wire
RE: Sqmm to circ mils and reverse,for magnet wire
respectfully
RE: Sqmm to circ mils and reverse,for magnet wire
RE: Sqmm to circ mils and reverse,for magnet wire
I think you mean to multiply by 4/pi. That's where the 1.2732 comes from in llangford's treatment above. There are (4/pi)CM per mil^2.
RE: Sqmm to circ mils and reverse,for magnet wire
squared inches(SQIN), squared meters(M2), squared centimeters(CM2), squared milimeters(MM2), circular mils (CM), etc, etc.
For the specific case of circular mils (CM), it is the area of a circle with .001 inches diameter.
1(CM) = PI x (0.001"/2)^2 = 0.000000785398163 (SQIN)
1(MM) = 1/25.4 (IN) lineal dimension
1(MM)^2 = (1/25.4)^2 =0.0015500031 (SQIN)
How many CM in 1 (MM2)?
0.0015500031/.000000785398163 = 1973.5252
RE: Sqmm to circ mils and reverse,for magnet wire
I should have done a sample calculation. That's when I always notice that I have it backwards. I'll be more careful for the next several times.
respectfully