Calculating weight of BIAB grain bag

In the spirit of experimentation I want to brew a BIAB batch just to compare it with MIAT (mash in a tun  :stuck_out_tongue: ). My primary concern going into this is the hassle of dealing with the bag post-mash–that it may be too heavy for me to deal with. Is there a method for calculating the weight of the bag? I will probably target a small batch anyway, but I thought it might be helpful to know going in what I’m dealing with and scale my recipe accordingly.