HOW TO CONVERT DIMENSION MM INTO INCHES
Printed From: CAD Forum
Category: EN
Forum Name: AutoCAD
Forum Description: Discussion about AutoCAD and AutoCAD LT, viewers, DWG and DWF formats, Design Review, AutoCAD 360, add-ons
URL: https://www.cadforum.cz/forum_en/forum_posts.asp?TID=5339
Printed Date: 30.Apr.2026 at 12:14
Topic: HOW TO CONVERT DIMENSION MM INTO INCHES
Posted By: prityjaiswal23
Subject: HOW TO CONVERT DIMENSION MM INTO INCHES
Date Posted: 18.Feb.2011 at 20:36
|
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. |
Replies:
Posted By: HAWDesigner
Date Posted: 18.Feb.2011 at 21:01
|
1" = 25.4mm
------------- -- R. Williams AutoCAD 2010 Certified Professional <!-- If all else fails hit F1 --> <<AutoCAD 2009 |
Posted By: prityjaiswal23
Date Posted: 18.Feb.2011 at 21:08
| 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. |
Posted By: HAWDesigner
Date Posted: 18.Feb.2011 at 21:29
|
The [CMD]UNITS[/CMD] command will allow you to do that. Does that help? ------------- -- R. Williams AutoCAD 2010 Certified Professional <!-- If all else fails hit F1 --> <<AutoCAD 2009 |
Posted By: HAWDesigner
Date Posted: 18.Feb.2011 at 21:30
|
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.
------------- -- R. Williams AutoCAD 2010 Certified Professional <!-- If all else fails hit F1 --> <<AutoCAD 2009 |
Posted By: CarlB
Date Posted: 18.Feb.2011 at 22:44
| 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. |
Posted By: John Connor
Date Posted: 19.Feb.2011 at 00:46
|
The scale factor you need to use is 10/254 or 0.0393700787401.
------------- "Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance." <<AutoCAD 2015>> |
Posted By: prityjaiswal23
Date Posted: 19.Feb.2011 at 09:35
| 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. |
Posted By: John Connor
Date Posted: 19.Feb.2011 at 12:32
|
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? ------------- "Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance." <<AutoCAD 2015>> |
Posted By: prityjaiswal23
Date Posted: 19.Feb.2011 at 13:56
| 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. |
Posted By: HAWDesigner
Date Posted: 19.Feb.2011 at 14:49
|
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. ------------- -- R. Williams AutoCAD 2010 Certified Professional <!-- If all else fails hit F1 --> <<AutoCAD 2009 |
Posted By: prityjaiswal23
Date Posted: 20.Feb.2011 at 09:44
| 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. |
Posted By: John Connor
Date Posted: 20.Feb.2011 at 12:49
|
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).
------------- "Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance." <<AutoCAD 2015>> |
Posted By: HAWDesigner
Date Posted: 20.Feb.2011 at 17:38
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.
------------- -- R. Williams AutoCAD 2010 Certified Professional <!-- If all else fails hit F1 --> <<AutoCAD 2009 |
Posted By: John Connor
Date Posted: 22.Feb.2011 at 12:16
|
That's why I suggested 10/254.
Time to get off the merry-go-round. Bye. ------------- "Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance." <<AutoCAD 2015>> |
Posted By: HAWDesigner
Date Posted: 22.Feb.2011 at 14:33
|
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.  ------------- -- R. Williams AutoCAD 2010 Certified Professional <!-- If all else fails hit F1 --> <<AutoCAD 2009 |
Posted By: John Connor
Date Posted: 22.Feb.2011 at 16:14
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. ------------- "Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance." <<AutoCAD 2015>> |
prityjaiswal23 wrote:Posted By: HAWDesigner
Date Posted: 22.Feb.2011 at 16:21
 s'all good.
------------- -- R. Williams AutoCAD 2010 Certified Professional <!-- If all else fails hit F1 --> <<AutoCAD 2009 |
Posted By: prityjaiswal23
Date Posted: 23.Feb.2011 at 18:46
| 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 |
Posted By: jmontesmx
Date Posted: 25.Feb.2011 at 03:26
|
Modify the dimension style with Alternate units option of your dwg to have both measurements mm and inches. |