This is meant as a guide, but it might help those out that are always wondering how much others gained by what week. It was posted on this board or another board a while back and I had it bookmarked. You can change it from the metric system too, just use the pull downs.
https://www.gurgle.com/tools_PregnancyWeight.aspx
(I can't make it clicky, sorry)
Re: Handy Weight Gain Calculator
heres another I like...
https://www.indiacurry.com/women/pregcalc.htm