View Full Version : Physical Screen Size

Nov 5, 2005, 11:25 AM
How big are the screens on the 17" iMac and 12" iBook. I'm guessing that the iMac is about 9.2" by 14.3" and the iBook being 9.6" by 7.2". Am I right, I don't have one to measure my self and couldn't see it on the sepcs on the apple site.

Anonymous Freak
Nov 5, 2005, 05:50 PM
Sorry, I'm too lazy to do the math right now, but you can figure it out if you know the diagonal size (you do,) and the aspect ratio (which I'm about to tell you.)

For Apple's Widescreens, the aspect ratio is 16:10. For 'regular' screens, it's 4:3. For the old 17" Studio Display LCD, it's 5:4.

How do you figure out the actual sizes? Well, remember triangles from back in math class, x^2+y^2=z^2? Basically, if you take that, and do the math for the aspect ratios, you get that the diagonal size of a 4:3 screen is 5 'units'. If your diagnoal size is 12.1" (The actual diagonal size of Apple's "12 inch" screens,) divide by 5 to get how many inches is a 'unit'. Multiply by 4 for the width in inches, multiply by 3 for height in inches. For a 16:10, the diagonal size is 18.87 units (square root of 16^2+10^2.) So... Divide your 17" screen by 18.87 to find out how many inches in a 'unit'. Mulitply by 16 for the width, 10 for the height.

Well, screw it. I had to launch calculator to figure out that 18.87, so I might as well do all the math now.

Your 17" screen is 14.41" wide, 9" tall. Your 12" screen is 9.68" wide, 7.26" tall.

Nov 5, 2005, 06:17 PM
Thanks, you didn't need to give me the maths lesson though, I've just sent off my university appication for a maths course :cool:, but you wern't to know. I was using that to work out the sizes, just wasn't sure of the ratios (I got the reg. one right, but used 16:9 for the widescreen). Thanks again.