WDCash Loc: Milford, Delaware, USA

I have read that when posting images to Facebook the best image size is 122X630.

So I was just playing in my Lightroom Classic, Export dialog box and I seem to be challenged about how to export an image as 1200 x639.
For example, The image I am working on is 5000 x 3333. In my export dialog box I have the option of exporting any size i want but in inches or cm. with the ability to select a resolution of pixels pr in or cm. I probably am missing something very simple of mixing up what 1200X630 equates to vs what I think it means.

Can someone please point me in the right direction.

Also I seem to recall that LR had a built in tool that would allow to export directly to social media. Im not seeing that function. am I missing it or has that option been removed.
Thanks
Bill

CHG_CANON Loc: the Windy City

The screen print for the LR export at this link shows where to specify the target pixel size at:

Recommended resizing parameters for digital images

Given you're resizing for an online presentation, the ideas related to a physical print size are not relevant, pixels only. As long as you 'resize to fit' on the long side for a given pixel resolution, the resolution ratio of pixels to CM or IN is nonsensical.

When you get your parameters correct, including the sRGB colorspace and a generic output folder, then save that LR Export for reuse.

lamiaceae Loc: San Luis Obispo County, CA

As long as the JPG image is not too large, stay <20MB and FB automatically resizes it. I have found there is no need to be precise about PPI dimensions with Face Book.

John N Loc: HP14 3QF Stokenchurch, UK

Facebook suggested recommendations, a quick Google search will bring up the latest (I might have a look later and see if I'm behind the times) but I use 2048 on the longest side and under 4mb as a .jpg.

This, apparently, minimises the degradation caused by Facebooks own Algorithms. I do better looking images than mine on Facebook but I think this is primarily down to other users better understanding of content and sharpening etc.

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

You can set LR to export with 2048 px as the longest dimension, which is the highest resolution Facebook will accept. If you use a larger image, Facebook will only down-sample it to 2048. I never use the tool to export directly. I create the image and save it on my hard drive, open Facebook, create a new post, and add photos from within Facebook, navigating to the folder where the images I want to import are.

If you are trying to add a cover photo to your home page in Facebook, the correct resolution is 820x312 px.

I think you found your information on Inc.com, but I think it's inaccurate.

These guidelines are more realistic, and are the ones I've been using since first joining Facebook:

https://louisem.com/1730/how-to-optimize-photos-for-facebook

Facebook will NOT resize an image that conforms with its max dimension of 2048. Luckily, most jpeg images will be under 1 mb in size, which has never been a problem for FB, so there is no need to specify a maximum size in LR's export dialog.

WDCash Loc: Milford, Delaware, USA

Gene,
Very informative article. Thanks

WDCash Loc: Milford, Delaware, USA

Thanks Paul

WDCash Loc: Milford, Delaware, USA

Thanks Mike,
I agree but have had some images buggered up by their resizing and or compression. Aparently it works out better sometimes if the poster sizes it to fit their platform standards

WDCash Loc: Milford, Delaware, USA

Thanks John,
It looks like 2048 is the magic number.

lamiaceae Loc: San Luis Obispo County, CA

Do note I did not state a pixel size but file size in bytes.