Re: Calculating Scan Size

From: patrick kelley ^lt;>
Date: 02/20/04-01:11:13 PM Z
Message-id: <>

part of the problem is the need to incorporate color depth as well.

a 5 x 7 inch, 300 dpi scan equates to 3,150,000 total pixels.

  if it is 24-bit color:

3,150,000 * 24 = 75,600,000

and then, as there are 8 bits in a 'byte': 75,600,000 divided by 8:

= 9,450,000 or about 9.4 megabytes.

pat kelley

patrick kelley
assistant professor
department of art
st. olaf college

On Feb 20, 2004, at 12:41 PM, Sandy King wrote:

> I know there must be a fairly simple way to figure out the total size
> of a file in mb based on scan resolution and size in inches but when I
> do the calcuation the way I think it should work it never agrees with
> the size of the actual scan.
> So how is the calculation made?
> Sandy King
Received on Fri Feb 20 13:11:30 2004

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