: What is going on with scale on Inkscape? I am using Inkscape 0.92 and I am trying to make a 1:1 size image of a physical part. The measurements of the part are 9.875 inches wide, by 6.875
I am using Inkscape 0.92 and I am trying to make a 1:1 size image of a physical part. The measurements of the part are 9.875 inches wide, by 6.875 inches high. However, when I zoom to a 1:1 and hole the part up to it, the rectangle on screen is much bigger. So I did some googling and found edit/preferences/interface zoom correction factor. I thought, this would fix the problem. I whipped out some callipers, set it to exactly one inch, and then scaled the on-screen ruler's inch to match my calliper's inch. I then created a 1 inch rectangle and measured it with my callipers and it was a perfect 1 inch square. Then I created the full size rectangle and it is not the right size. It is longer and wider than it should be.
Anyone know whats going on here?
Below are screenshots of the issue. The blue square is set to 1 inch square. Holding a ruler up to it shows it to be exactly 1 inch square. However, putting the ruler to the red square, which is manually set to 9.875x6.875 inches, you can see its 10.5 inches on the ruler. If the one inch square is 1:1, why isnt the bigger rectangle?
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In Preferences, select Interface.
Resize the dialog box so you can see the largest measurement possible. In my example I used 11 inches as the measurement, and set the zoom correction factor so it matches that measurement measured against a ruler.
Then in the Inkscape menu hit View > Zoom > Zoom 1:1
The onscreen image should then show the image at actual size. I tried this and it worked for me, and it's pretty damned close to the actual size. 100% accuracy is probably not possible.
A small amount of error shouldn't matter much, because when printed with no scaling, the images should print to exact scale.
Your measurement is probably off, also in the image your ruler is not entirely straight. You should always erasure correction measurement is done on a BIG dimension to account for rounding and measurement error. Better yet use manufacturer information of this.
10.5/9.875 is about 6 % off
This is well withing error of measurement on small scale. Had you measured the screen by full width then youd be much ore closer to the truth as your measurement errors would fold out.
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