The tip is originally published @ http://excel-inside.pro/blog/2016/06/06/bin2dec-in-power-query-implementations-of-list-accumulate-part-1/
My formula is a slight modification of this.
You can use following formula to convert from Binary Decimal where [Binary Number] is the column which holds the binary number.
List.Accumulate(Text.ToList([Binary Number]), 0, (s,c)=> s*2 + Number.From(c))
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