New answers tagged conversion
There is a feature request for metric units here https://forums.loseit.com/posts/list/60/178.page which is active since 2009. So according to the forum thread, as of writing this answer,metric units are not available for Lose it! yet.
@Michael's solution is good. But here is another way: Facebook provide an option for the storing High Resolution images. I had seen while uploading multiple images (while creating an album) Snapshot:
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