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If you would like to estimate the size of an image file,
please complete (or select an item for) each of the fields below:

Height		inches mm cm (measured in)
Width
Resolution		pixels per inch pixels per mm pixels per cm  (measured in)
Bit depth	8-bit 14-bit 16-bit 24-bit 32-bit 42-bit 48-bit 1-bit *	(8=typical for color & grayscale, 2=bitmapped image)
Type of image	color grayscale CMYK

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Number of points		(Height x Width x Resolution)
Number of bytes	x	( 1 byte for 8 or 24 bits, 2 bytes for all others)
Number of pixels per point	x	( 3 for color )
Bytes per kilobyte	÷	( 1024 )
Size of image file	=	in KB
Size of image file	=	in MB (megabytes=KB/1024)

*Depends on your scanner settings or capability of your digital camera.

Other notes:

1. If you are scanning a slide, you need to take into account the effect of any cropping.   A typical 35mm slide scans at 33mm x 22mm due to cropping and because a portion of the slide is hidden by the slide mount.
2. This calculator doesn't assume any file compression so it won't work for JPEG or GIF image files.
3. This calculator should be pretty close for TIF and PSD image files.
4. This calculator assumes your image file is flattened, i.e. there are no layers or layer masks.