Need help with convert_add function please

Need help with convert_add function please.
I need to convert a whole colum of cells from lbs to grams what is the proper way to achieve this thanks?

Your weight/mass would be in Cell A1 and the convert_add formula in Cell A2. Copy it down to match however many values in column A.

=CONVERT_ADD(A1,"lbm","g")

Other conversion units are found in the help menu under convert_add. lbm (LBM) is used as pounds of mass so it is not confused with lbf (LBF) or pounds of force.

Cool thanks