GIMP Version: 2.8.10
Operating System: Windows
OS Version: 10 Home
GIMP Experience: New User

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I have to make an image of 7cm x 29cm and when I put the measurements in the resulting canvas at 100 percent only looks about half of what it should be. Do I need to change it somewhere else to get the proper dimensions?

7cm in pixels= 264.566929134
29cm in pixels= 1096.062992126

Gimp doesn't count fractions of pixels and will round it to the nearest pixel.

I got the cm to pixels information here...
http://www.unitconversion.org/typograph ... rsion.html

Thanks Wallace. I hadn't checked google yet. was hoping someone would give me a faster answer.

Try to create the canvas using pixels and see if that's any better.
It seems to me, that you're looking to create a tall and thin canvas, is this correct?

Hate to break the illusion but Gimp works in pixels not real world units.

The conversion to cms really comes in when printing is involved, where for quality, a higher pixels-per-inch (PPI - historically inches are used) is required.

example: making a new canvas you can have anything from typically
72 ppi 199 x 822 pix to
300 ppi 827 x 3425 pix and anything in between or over.



So the real question is, What is the purpose of the image?

Thanks Rich2005.

If it is going to be printed, then providing there is no other reson for a smaller canvas, (eg small photographs that will never print at high quality) Go for 3425 x 825 pix @ 300 ppi

Going back to the first post:



Gimp uses pixels, The default setting top of the view menu is dot-for-dot on This means each pixel on the canvas equals a pixel on your computor monitor.

Turn that off and at zoom 100% the image on your monitor equals how it will print. Try that just to see how it works, then turn dot-for-dot back on, it is the mode you need.

An actual photo of my monitor with dot-for-dot off and a ruler measuring the canvas, if you are using a laptop, you might not get 29 cm. to fit





Well, some people might be making posters / banners, even billboards and because they are viewed at a distance a suitable ppi might only be 30 or 40. Gimp can do that as well

I ended up doing one of just the third of the width
Can put three around then if they want.

Thanks rich