Error in power query editor

Hi Arpitpawar, I don't know how exactly is your column with that time or duration stored but you can do something like this:

Result

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMsooKlYwMsjNzFPSUTKyMjJQio0FAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t, Column2 = _t]),
    Ad_Col1ToMinutes = Table.AddColumn(Source, "Col1 to Minutes", each 
     [ l = List.Transform(Splitter.SplitTextByCharacterTransition({"0".."9"}, {"a".."z", "A".."Z"})([Column1]), (x)=> Number.From(Text.Select(x, {"0".."9"}))),
       m = l{0} * 60 + l{1}
     ][m], Int64.Type
),
    Ad_Col2ToMinutes = Table.AddColumn(Ad_Col1ToMinutes, "Col2 to Minutes", each 
     [ l = List.Transform(Text.Split([Column2], ":"), (x)=> Number.From(Text.Trim(x))),
       m = l{0} * 60 + l{1}
     ][m], Int64.Type)
in
    Ad_Col2ToMinutes

Hi Arpitpawar ,

Here is my sample data:

The data type is Duration.
Please follow the screenshot below:

The final output is as below:

Best Regards,
Dino Tao
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.