Resize object to precise dimensions proportionally

Hello,
I am very new to blender.

I would like to know how i can take an object and keep it in proportion but resize it.

like a cube that is 5x5x5 and how would i type in 10 and the whole cube would then grow to 10x10x10
This is an example of what i am trying to achieve.

Any help greatly appreciated.

rescale

I must be missing something.
I am trying to follow this demonstration.
Greatly appreciate your help.

the Dimensions are only accessible in object mode and are ā€œlinkedā€ with the scale.
ex: if you scale your 1m object by two. it ll be 2m large with a scale of two.

But, Really often, when you are modelling, the common use is to have a 1,1,1 scale. If not, it may occurs unwanted comportments with modifiers,materials, etcā€¦
Thatā€™s why after the resize steps, i apply the scale with CTL A. To freeze this size ā€œas this object was born like thisā€

ok.
I am not able to freeze the size then

If you know you want to double the size, you can press ā€˜Sā€™ and then ā€˜2ā€™

If your object has a dimension that is, say 5, and you want to scale it so that dimension ends up being 10, then youā€™ll have to do a bit of quick maths and divide 10 by 5 to get your scaling factor and again, press ā€˜Sā€™ followed by that factor.

Not sure what you mean by ā€˜Freeze the sizeā€™, also it would help if you told us which part of the video you canā€™t follow, or how itā€™s not showing what youā€™re trying to achieve.

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ok. lets say your create a monkey head at 5 feet tall. not want the monkey to be 6 feet 2 inches tall. how can type 74" in z and have it grow proportionaly ?

sorry i didnt type well

ok. lets say I create a monkey head at 5 feet tall. now i want the monkey to be 6 feet 2 inches tall. how can type 74" in z and have it grow proportionaly ?

Without any clues itā€™s very difficult to find how, for us.
Normally, when you try to apply scale, and it doesnā€™t workā€¦ there is a message displayed, saying whyā€¦
I guess, in an hypothetical manner that you 've got more than one object sharing the same mesh. Called instances and generated by duplicating objects with ALT D. But itā€™s an hypothesis, because i donā€™t have any info/picture/blend file, to investigate further more.

Ps: when you answer, better use the Reply button under the post where the person is writing, instead of the one by the end of the page. Without that, forum users ll not be notified about your message.

The best way I can think of getting around the metric conversion factors ( when you enter 6ā€™2" it is converted internally into 1.8796 in metric) ā€¦and the fact that scaling is +z and -z due from the origin, so you need to scale by 1/2 to totalā€¦
soā€¦
Open up your N-Panel to see the dimensions and scaleā€¦
image

Use precision scaling ( hold down Shift ) and use the slider on the z-axis to change to 75"
or Better yet enter in the z-dimension 32in+43in and enter to get 75"ā€¦
Now look at your Scale ( scale is proportional by the way ) it will read ,
X=1, Y=1, Z=2.34
so left-click in the Z-axis and hold, then drag up through Y and X, changing Scale to 2.34 in each fieldā€¦
your Dimensions will change to proportional scaling in relation to the Z-axis dimension of 75"

Then Apply scale and you got what you wantā€¦

NOTE: If you use the Scale with the mouse by entering S+Z and pulling the scale-up while holding the Shift Key, then when it reads 75 in the Z-dimension, click the Scroll Button to set Proportional, then Left Click to confirmā€¦

2 Likes

I find this addon quite handy for that:

test

Ctrl + a to apply the scale afterwards.

3 Likes

WOW. Thank you all so much.
I downloaded the add on. it works GREAT!!!
Thank you so much.

Proportional Dimensions To New Size is a great add-on, it does exactly what it claims to doā€¦ The problem is when we want to resize multiple selected objects to an exact dimension (mm, inch) without having to merge them.

So far I have found that with the help of ā€œProportional Dimensions To New Sizeā€ I can achieve that simple task with a lot of extra workā€¦

For example, we have two objects that we want to enlarge proportionally by setting the desired height.

  • select the objects that we want to enlarge proportionally
  • OBJECT > SNAP > CURSOR TO SELECTED
  • OBJECT > SET ORIGIN > ORIGIN TO 3D CURSOR
  • OBJECT > DUPLICATE OBJECTS
  • move the duplicated objects aside
  • merge duplicated objects, OBJECT > JOIN
  • select the original objects and the duplicated object, for the active object mark the duplicated
  • in field Z at ā€œProportional Dimensionsā€ panel type the desired height

We got our two objects proportionally enlarged to the desired height, now delete the duplicated.

Does anyone know of an easier way?

Video description

blender_prop_obj_resized

Iā€™m sorry that Iā€™m only making this suggestion to you:
Sabatol, the creator of the addon, has been very active on Github lately. Try your luck and create an issue with the request to extend the code with this function. If you ask nicely and give a good example why this is needed, chances are he will do it.

Good luck

*edit Iā€™m already rushed and have asked, letā€™s hope for the best

2 Likes

Thank you @cyso
Best tip regarding this issue!
xxx

Hi, you can check this solution I proposed on RCS to resolve this quirky issue. https://blender.community/c/rightclickselect/g2MG/

1 Like