mm to inches

[Jaycad3]

I know this is probably easy, but I can not find the answer.

We've received a dwg drawn in mm (I think) and I want to convert it to inches.
I go to format units and it says unitless. Changing it there does nothing.

I don't want to scale everything we get from them, I want to change the dimension units.

It looks like the scale factor is .0245 in alternate units - correct?
Need verification, thank you.

Jay

[hwalker]

1 inch is 25.4 millimetres. So your dimension scale factor needs to be 25.4

[Jaycad3]

That's if you're going from inches to mm, but I need mm to inches. I tried the default first, but it is not right. When I changed it to .0245, it was.
Possibly the dwg was not drawn 1:1?

Edited by: Jaycad3 on Mar 19, 2009 3:54 PM Edited by: Jaycad3 on Mar 19, 2009 3:57 PM

[Anonymous]

If you simply change the unit to inches, then a line that used to be 1mm in
the drawing will now be 25.4 millimeters. If you use a dimension style that
is set for fractional, it will still call that line 1 unit long.

Drawings in model space are normally drawn at true size.

You will need to go to model space, select the entire drawing and scale it
correctly.

Try scaling the entire drawing by 10/254.

This way what used to be 1 unit (millimeters) in the drawing will now be
1/25.4 of a unit.

What used to be 25.4 units (millimeters) in the drawing will now be one
unit, and you can now set your units for inches, and use a dimension style
that is fractional or architectural if you desire, and the dimensions will
be correct for what was originally drawin in millimeters.

Autocad draws in units. It only knows that. If the drawing was previously
drawn with the "unit" being a millimeter, then that is what a line that is
"1" unit long will be. It will be one millimeter long.

If you now call that line that is 1 unit long an inch, your dimensions will
be off by a factor or 25.4. That is why you need to scale the actual drawing
in model space.

Changing the unit for the drawing does not re-scale the drawing to a new
unit.

Man, I hope I explained this in a clear way.

GC


wrote in message news:6145303@discussion.autodesk.com...
I know this is probably easy, but I can not find the answer. We've received
a dwg drawn in mm (I think) and I want to convert it to inches. I go to
format units and it says unitless. Changing it there does nothing. I don't
want to scale everything we get from them, I want to change the dimension
units. It looks like the scale factor is .0245 in alternate units - correct?
Need verification, thank you. Jay

[Anonymous]

You can set up a dimension style or edit an existing dim style using the
conversion factor of 25.4 or 1/25.4 = 0.03937 int the linear scaling
area of dimstyles (it would normally be 1). You can use Alternate
dimensions (see the tab in dim styles)and make it dimension in both
metric and imperial.

George Drayton CD-CAD Ltd Christchurch New Zealand

[Anonymous]

As you can tell from the replies so far, your
"intent" is foggy: do you want to "...I want
to convert it to inches..." or do you want to "...I want to change the dimension
units..."

You are asking for Apples and Oranges at the same
time. Clarify.

--
Dean Saadallah

href="http://LTisACAD.blogspot.com">http://LTisACAD.blogspot.com
--

[Anonymous]

This I did not know. Thanks.

GC


"George Drayton" wrote in message
news:6145612@discussion.autodesk.com...
You can set up a dimension style or edit an existing dim style using the
conversion factor of 25.4 or 1/25.4 = 0.03937 int the linear scaling
area of dimstyles (it would normally be 1). You can use Alternate
dimensions (see the tab in dim styles)and make it dimension in both
metric and imperial.

George Drayton CD-CAD Ltd Christchurch New Zealand

[Anonymous]

Need some guidance or help,

I have an old Archive paper copy drawing that has been drawn up in inches and there is no DWG Versions of it.

So I have been doing the basic way of using the calculator and converting the written dimensions down (inches) and then doing the process of converting to mm. But this is taking too long, and im wondering is there a add on or tool that I can use that makes things more simple were I could just type in the (inches) dimension and that would draw a line or what ever is needed to be drawing as a line in mm etc 

[KateMorricalTowne]

Draw it in inches first, then scale it?

[Bob_Zurunkle]

Hey Kate, nice to see you're still around, in one form or another 🙂

[Charles_Shade]

Ethereal or corpulent?

[Bob_Zurunkle]

...or should I say, one forum or another?...

[LauraSpiegel4053]

Can someone give step-by-step instructions on how to do this? I am new to AutoCAD and have converted a PDF to DWG. The Insertion Scale lists "inches" yet the measurements on the drawing suggest metric. I have looked under UNITS and Dimension Styles but no changes have worked. I need to put the conversion factor of 10/254 or 0.039370079 in "somewhere". Help?!?!?!

[cmanzo1]

This worked great - brining in a 'derived' part in inch units... but should have been mm.....cheers, C

[Anonymous]

1 mm is 1/25.4 inches. So, your scale factor will be 25.4 you can check MM to Inches

and to do it in CAD check the reference here - Millimeters to Inches

[Anonymous]

download Length Converter / Unit Converter apknite to your phone 🤦‍:male_sign: