hi, i am new user of this community, i find this community amazing .Is there any easy way to convert mm dwg into inches as i working in company and i use to get,autocad file in mm from architect. thanx n pls do reply to my prlm.

1" = 25.4mm

that i know i am not talking bot it, i mean how i convert my cad file whose dimension are in mm into inches so that i can get all the dimension of dwg  in inches.

The [CMD]UNITS[/CMD] command will allow you to do that.Does that help?

Note: That won't change the size of your drawing. You'll have to [CMD]SCALE[/CMD] everything in the drawing up by 25.4.

I would say scale  the drawing DOWN by 25.4. For example a part that is 25.4 units long would be 1 unit long after scaling.

The scale factor you need to use is 10/254 or 0.0393700787401.

I hve try to convert dimension by changing unit it doesn't work.Thanx  everyone for ur suggestions. By scale factor 10/254  dwg size also change and after changing format i get all the dimension in inches. john can u tell me wat we are doing actually by putting 10/254 for conversion,this is just am asking to clear my concept. THANKS.

I found the conversion factor online by doing a search, in Google, for converting from mm to inches.  If you do the same you'll learn the reasoning behind it.I recently helped someone in a Canadian architectural firm convert a building drawing they got from a client in Germany.  That's where I first came upon it.  I did not write it down though so I had to search all over again.So you got your problem solved right?

ya  my prblm is  almost solved, the only thing is there i find slight diff in measurement like 1" or 2 " difference, the measurement are not accurrate. Thanks once again, i will search from google for reasoning behind this.

prityjaiswal, remember earlier when I said you needed to scale the DWG (down) by 25.4?What that means is that you need to scale the DWG by 1/25.4. However, AutoCAD does not allow the entry of a Fraction and a Decimal. You have to enter either one or the other, but you cannot enter both. As a workaround, you can multiply by a factor of 10 to eradicate the decimal, thus having 10/254.So 1/25.4 = 10/254 = 100/2540, etc.

ok now i get it, i was not aware of this, that we cannot enter both together.My concept is clear now and i understand wat   you mean last  time. thanks.

Yes, you can have dual dimensions in one drawing.  In your dimension style you can select ALTERNATE units and AutoCAD will display both metric and imperial (one above the other).

John, I'm aware that you can have dual dimensions in one drawing. I use that all the time. What I said was that you cannot enter both fraction and decimal ("1/25.4") into the commandline at the same time. Try it.[code]Command: scSCALE 1 foundSpecify base point:Specify scale factor or [Copy/Reference] <0'-1">: 1/25.4Requires numeric distance, second point, or option keyword.Specify scale factor or [Copy/Reference] <0'-1">: [/code]


HAWDesigner2011-02-20 17:39:46

That's why I suggested 10/254.
 
Time to get off the merry-go-round.  Bye.

John, I think you missed something...like maybe the question "john can u tell me wat we are doing actually by putting 10/254 for conversion,this is just am asking to clear my concept."When you didn't answer that question, I did. And then you started going off on a tangent about dual dimensions that didn't even have anything to do with the OPs original question.Moral of the story: If you're going to jump off the Merry-go-round early, don't go and spin it faster to tick the other kids off.

[QUOTE=prityjaiswal23]ok now i get it, i was not aware of this, that we cannot enter both together.My concept is clear now and i understand wat   you mean last  time. thanks. [/QUOTE]
This is where I did not put on my reading glasses and why I went off on the tangent.  Next time I'll wear my glasses.

s'all good.

Thanks both of you for solving my problem and John pls do not wear your reading glass as you missed it,i get know more information from you and Rob.we benefited by that  debate.LOL 

Modify the dimension style with  Alternate units option of your dwg to have both measurements mm and inches.