Confusion on file size

[LynnPassionart]

I have an image that needs to be not greater than 3.5MB but the longest side has to be at least 1800 pixels to qualify for an art entry, I called for help this morning but just as the tech was making progress the call dropped. When I view the metadata in a finder window (Mac) it meets those criteria, however when I open it, and look at it using Image>ImageSize, the number of pixels on the longest side is ok but the file size is 11.7mb.

Thanks for any suggestions.

[kglad]

what app?

[LynnPassionart]

Photoshop, but I think I just got an answer. Thanks much!

[Christal5C77]

Hey

[kglad]

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.

<"moved from using the community">

[LynnPassionart]

Thanks!

[davescm · Accepted solution]

@LynnPassionart The 3.5MB criteria you have been given is likely to be the filesize as saved to a disk. On saving files can be heavily compressed to save disk space, especially when using jpeg, and to cut down filesize when sending online.

The data you see in Image > Image size is a simple calculation of pixel width x pixel height x 3 (for an RGB 8 bit image) or x 6 (for an RGB 16 bit image). It has nothing to do with the compressed file size on disk.

Dave

[LynnPassionart]

Dave,

you made that so much clearer than either of the tech support people I spoke with today ( they did fine, I just didn't understand it as well as I do now)

Thank you, I appreciate you.

Lynn

[davescm]

You're welcome 🙂

Dave

[Trevor.Dennis]

We've marked his answer as Correct Lynn.  That means one of those Amazon drones will shortly drop a big box of chocolates off at his house.  He'll be reet pleased pet.  It'll help him get over that oop north weather.

[davescm]

Haha - I see you have our weather spot on Trevor.  Apparantly Amazon have been testing drones here, I hope they aren't that big though! 🙂

Dave